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efm8 laser bee family efm8lb1 data sheet the efm8lb1, part of the laser bee family of mcus, is a per- formance line of 8-bit microcontrollers with a comprehensive ana- log and digital feature set in small packages. these devices offer state-of-the-art performance by integrating 14-bit adc, internal calibrated temperature sensor (3 c), and up to four 12-bit dacs into small packages, making them ideal for the most stringent analog requirement applications. with an effi- cient, pipelined 8051 core with maximum operating frequency at 72 mhz, various com- munication interfaces, and four channels of configurable logic, the efm8lb1 family is optimal for many embedded applications. efm8lb1 applications include the following: key features ? pipelined 8-bit 8051 mcu core with 72 mhz operating frequency ? up to 29 multifunction i/o pins ? one 14-bit, 900 ksps adc ? up to four 12-bit dacs with synchronization and pwm capabilities ? two low-current analog comparators with built-in reference dacs ? internal calibrated temperature sensor (3 c) ? internal 72 mhz and 24.5 mhz oscillators accurate to 2% ? four channels of configurable logic ? 6-channel pwm / pca ? six 16-bit general-purpose timers ? optical network modules ? precision instrumentation ? industrial control and automation ? smart sensors i/o ports core / memory clock management cip-51 8051 core (72 mhz) high frequency 72 mhz rc oscillator energy management brown-out detector 8-bit sfr bus serial interfaces timers and triggers analog interfaces spi security pin reset adc 2 x comparators internal voltage reference 16-bit crc flash program memory (up to 64 kb) ram memory (up to 4352 bytes) debug interface with c2 lowest power mode with peripheral operational: idle normal shutdown suspend snooze timer 3/4 up to 4 x voltage dac high frequency 24.5 mhz rc oscillator pin wakeup external interrupts general purpose i/o i 2 c / smbus 2 x uart high-speed i2c slave external oscillator low frequency rc oscillator 4 x configurable logic units watchdog timer pca/pwm timers 0/1/2/5 internal ldo regulator power-on reset silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 this information applies to a product under development. its characteristics and specifications are subject to change without notice.
1. feature list the efm8lb1 device family are fully integrated, mixed-signal system-on-a-chip mcus. highlighted features are listed below. ? core: ? pipelined cip-51 core ? fully compatible with standard 8051 instruction set ? 70% of instructions execute in 1-2 clock cycles ? 72 mhz maximum operating frequency ? memory: ? up to 64 kb flash memory (63 kb user-accessible), in-sys- tem re-programmable from firmware in 512-byte sectors ? up to 4352 bytes ram (including 256 bytes standard 8051 ram and 4096 bytes on-chip xram) ? power: ? internal ldo regulator for cpu core voltage ? power-on reset circuit and brownout detectors ? i/o: up to 29 total multifunction i/o pins: ? up to 25 pins 5 v tolerant under bias ? selectable state retention through reset events ? flexible peripheral crossbar for peripheral routing ? 5 ma source, 12.5 ma sink allows direct drive of leds ? clock sources: ? internal 72 mhz oscillator with accuracy of 2% ? internal 24.5 mhz oscillator with 2% accuracy ? internal 80 khz low-frequency oscillator ? external cmos clock option ? external crystal/rc/c oscillator (up to 25 mhz) ? analog: ? 14/12/10-bit analog-to-digital converter (adc) ? internal calibrated temperature sensor (3 c) ? 4 x 12-bit digital-to-analog converters (dac) ? 2 x low-current analog comparators with adjustable refer- ence ? communications and digital peripherals: ? 2 x uart, up to 3 mbaud ? spi? master / slave, up to 12 mbps ? smbus?/i2c? master / slave, up to 400 kbps ? i 2 c high-speed slave, up to 3.4 mbps ? 16-bit crc unit, supporting automatic crc of flash at 256- byte boundaries ? 4 configurable logic units ? timers/counters and pwm: ? 6-channel programmable counter array (pca) supporting pwm, capture/compare, and frequency output modes ? 6 x 16-bit general-purpose timers ? independent watchdog timer, clocked from the low frequen- cy oscillator ? on-chip, non-intrusive debugging ? full memory and register inspection ? four hardware breakpoints, single-stepping with on-chip power-on reset, voltage supply monitor, watchdog timer, and clock oscillator, the efm8lb1 devices are truly standalone system-on-a-chip solutions. the flash memory is reprogrammable in-circuit, providing nonvolatile data storage and allowing field up- grades of the firmware. the on-chip debugging interface (c2) allows non-intrusive (uses no on-chip resources), full speed, in-circuit debugging using the production mcu installed in the final application. this debug logic supports inspection and modification of memory and registers, setting breakpoints, single stepping, and run and halt commands. all analog and digital peripherals are fully functional while debugging. device operation is specified from 2.2 v up to a 3.6 v supply. devices are aec-q100 qualified (pending) and availa- ble in 4x4 mm 32-pin qfn, 3x3 mm 24-pin qfn, 32-pin qfp, or 24-pin qsop packages. all package options are lead-free and rohs compliant. efm8lb1 data sheet feature list silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 1
2. ordering information efm8 lb1 C 2 f 64 e a C qfn32 r tape and reel (optional) package type revision temperature grade e (-40 to +105) flash memory size C 64 kb memory type (flash) family feature set laser bee 1 family silicon labs efm8 product line figure 2.1. efm8lb1 part numbering all efm8lb1 family members have the following features: ? cip-51 core running up to 72 mhz ? three internal oscillators (72 mhz, 24.5 mhz and 80 khz) ? smbus ? i2c slave ? spi ? 2 uarts ? 6-channel programmable counter array (pwm, clock generation, capture/compare) ? six 16-bit timers ? four configurable logic units ? 14-bit analog-to-digital converter with integrated multiplexer, voltage reference, temperature sensor, channel sequencer, and direct- to-xram data transfer ? two analog comparators ? 16-bit crc unit ? aec-q100 qualified (pending) in addition to these features, each part number in the efm8lb1 family has a set of features that vary across the product line. the product selection guide shows the features available on each family member. table 2.1. product selection guide ordering part number flash memory (kb) ram (bytes) digital port i/os (total) adc0 channels voltage dacs comparator 0 inputs comparator 1 inputs pb-free (rohs compliant) temperature range package efm8lb12f64e-a-qfn32 64 4352 29 20 4 10 9 yes -40 to +105 c qfn32 efm8lb12f64e-a-qfp32 64 4352 28 20 4 10 9 yes -40 to +105 c qfp32 efm8lb12f64e-a-qfn24 64 4352 20 12 4 6 6 yes -40 to +105 c qfn24 efm8lb12f64e-a-qsop24 64 4352 21 13 4 6 7 yes -40 to +105 c qsop24 efm8lb1 data sheet ordering information silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 2
ordering part number flash memory (kb) ram (bytes) digital port i/os (total) adc0 channels voltage dacs comparator 0 inputs comparator 1 inputs pb-free (rohs compliant) temperature range package efm8lb12f32e-a-qfn32 32 2304 29 20 4 10 9 yes -40 to +105 c qfn32 efm8lb12f32e-a-qfp32 32 2304 28 20 4 10 9 yes -40 to +105 c qfp32 efm8lb12f32e-a-qfn24 32 2304 20 12 4 6 6 yes -40 to +105 c qfn24 efm8lb12f32e-a-qsop24 32 2304 21 13 4 6 7 yes -40 to +105 c qsop24 efm8lb11f32e-a-qfn32 32 2304 29 20 2 10 9 yes -40 to +105 c qfn32 efm8lb11f32e-a-qfp32 32 2304 28 20 2 10 9 yes -40 to +105 c qfp32 efm8lb11f32e-a-qfn24 32 2304 20 12 2 6 6 yes -40 to +105 c qfn24 efm8lb11f32e-a-qsop24 32 2304 21 13 2 6 7 yes -40 to +105 c qsop24 efm8lb11f16e-a-qfn32 16 1280 29 20 2 10 9 yes -40 to +105 c qfn32 efm8lb11f16e-a-qfp32 16 1280 28 20 2 10 9 yes -40 to +105 c qfp32 efm8lb11f16e-a-qfn24 16 1280 20 12 2 6 6 yes -40 to +105 c qfn24 EFM8LB11F16E-A-QSOP24 16 1280 21 13 2 6 7 yes -40 to +105 c qsop24 efm8lb10f16e-a-qfn32 16 1280 29 20 0 10 9 yes -40 to +105 c qfn32 efm8lb10f16e-a-qfp32 16 1280 28 20 0 10 9 yes -40 to +105 c qfp32 efm8lb10f16e-a-qfn24 16 1280 20 12 0 6 6 yes -40 to +105 c qfn24 efm8lb10f16e-a-qsop24 16 1280 21 13 0 6 7 yes -40 to +105 c qsop24 efm8lb1 data sheet ordering information silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 3
3. system overview 3.1 introduction system clock configuration cip-51 8051 controller core 64 kb isp flash program memory 256 byte sram sfr bus 4096 byte xram sysclk independent watchdog timer power net voltage regulator vdd vregin gnd extclk power-on reset supply monitor c2ck/rstb reset debug / programming hardware c2d analog peripherals digital peripherals amux priority crossbar decoder crossbar control port i/o configuration crc 2 comparators 14/12/10- bit adc temp sensor vref vdd vdd internal reference + - + - uart1 timers 0, 1, 2, 3, 4, 5 6-ch pca i2c / smbus spi port 0 drivers port 1 drivers p0.n port 2 drivers p2.n p1.n port 3 drivers p3.n uart0 i2c slave vio xtal1 xtal2 config. logic units (4) 24.5 mhz 2% oscillator cmos clock input 72 mhz 2% oscillator low freq. oscillator external crystal / rc oscillator 4 12-bit dacs figure 3.1. detailed efm8lb1 block diagram efm8lb1 data sheet system overview silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 4
3.2 power all internal circuitry draws power from the vdd supply pin. external i/o pins are powered from the vio supply voltage (or vdd on devi- ces without a separate vio connection), while most of the internal circuitry is supplied by an on-chip ldo regulator. control over the device power can be achieved by enabling/disabling individual peripherals as needed. each analog peripheral can be disabled when not in use and placed in low power mode. digital peripherals, such as timers and serial buses, have their clocks gated off and draw little power when they are not in use. table 3.1. power modes power mode details mode entry wake-up sources normal core and all peripherals clocked and fully operational idle ? core halted ? all peripherals clocked and fully operational ? code resumes execution on wake event set idle bit in pcon0 any interrupt suspend ? core and peripheral clocks halted ? hfosc0 and hfosc1 oscillators stopped ? regulator in normal bias mode for fast wake ? timer 3 and 4 may clock from lfosc0 ? code resumes execution on wake event 1. switch sysclk to hfosc0 2. set suspend bit in pcon1 ? timer 4 event ? spi0 activity ? i2c0 slave activity ? port match event ? comparator 0 rising edge ? clun interrupt-enabled event stop ? all internal power nets shut down ? pins retain state ? exit on any reset source 1. clear stopcf bit in reg0cn 2. set stop bit in pcon0 any reset source snooze ? core and peripheral clocks halted ? hfosc0 and hfosc1 oscillators stopped ? regulator in low bias current mode for energy sav- ings ? timer 3 and 4 may clock from lfosc0 ? code resumes execution on wake event 1. switch sysclk to hfosc0 2. set snooze bit in pcon1 ? timer 4 event ? spi0 activity ? i2c0 slave activity ? port match event ? comparator 0 rising edge ? clun interrupt-enabled event shutdown ? all internal power nets shut down ? pins retain state ? exit on pin or power-on reset 1. set stopcf bit in reg0cn 2. set stop bit in pcon0 ? rstb pin reset ? power-on reset 3.3 i/o digital and analog resources are externally available on the devices multi-purpose i/o pins. port pins p0.0-p2.3 can be defined as gen- eral-purpose i/o (gpio), assigned to one of the internal digital resources through the crossbar or dedicated channels, or assigned to an analog function. port pins p2.4 to p3.7 can be used as gpio. additionally, the c2 interface data signal (c2d) is shared with p3.0 or p3.7, depending on the package option. the port control block offers the following features: ? up to 29 multi-functions i/o pins, supporting digital and analog functions. ? flexible priority crossbar decoder for digital peripheral assignment. ? two drive strength settings for each port. ? state retention feature allows pins to retain configuration through most reset sources. ? two direct-pin interrupt sources with dedicated interrupt vectors (int0 and int1). ? up to 24 direct-pin interrupt sources with shared interrupt vector (port match). efm8lb1 data sheet system overview silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 5
3.4 clocking the cpu core and peripheral subsystem may be clocked by both internal and external oscillator resources. by default, the system clock comes up running from the 24.5 mhz oscillator divided by 8. the clock control system offers the following features: ? provides clock to core and peripherals. ? 24.5 mhz internal oscillator (hfosc0), accurate to 2% over supply and temperature corners. ? 72 mhz internal oscillator (hfosc1), accurate to 2% over supply and temperature corners. ? 80 khz low-frequency oscillator (lfosc0). ? external crystal / rc / c oscillator. ? external cmos clock input (extclk). ? clock divider with eight settings for flexible clock scaling: ? divide the selected clock source by 1, 2, 4, 8, 16, 32, 64, or 128. ? hfosc0 and hfosc1 include 1.5x pre-scalers for further flexibility. 3.5 counters/timers and pwm programmable counter array (pca0) the programmable counter array (pca) provides multiple channels of enhanced timer and pwm functionality while requiring less cpu intervention than standard counter/timers. the pca consists of a dedicated 16-bit counter/timer and one 16-bit capture/compare mod- ule for each channel. the counter/timer is driven by a programmable timebase that has flexible external and internal clocking options. each capture/compare module may be configured to operate independently in one of five modes: edge-triggered capture, software timer, high-speed output, frequency output, or pulse-width modulated (pwm) output. each capture/compare module has its own associated i/o line (cexn) which is routed through the crossbar to port i/o when enabled. ? 16-bit time base ? programmable clock divisor and clock source selection ? up to six independently-configurable channels ? 8, 9, 10, 11 and 16-bit pwm modes (center or edge-aligned operation) ? output polarity control ? frequency output mode ? capture on rising, falling or any edge ? compare function for arbitrary waveform generation ? software timer (internal compare) mode ? can accept hardware kill signal from comparator 0 or comparator 1 efm8lb1 data sheet system overview silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 6
timers (timer 0, timer 1, timer 2, timer 3, timer 4, and timer 5) several counter/timers are included in the device: two are 16-bit counter/timers compatible with those found in the standard 8051, and the rest are 16-bit auto-reload timers for timing peripherals or for general purpose use. these timers can be used to measure time inter- vals, count external events and generate periodic interrupt requests. timer 0 and timer 1 are nearly identical and have four primary modes of operation. the other timers offer both 16-bit and split 8-bit timer functionality with auto-reload and capture capabilities. timer 0 and timer 1 include the following features: ? standard 8051 timers, supporting backwards-compatibility with firmware and hardware. ? clock sources include sysclk, sysclk divided by 12, 4, or 48, the external clock divided by 8, or an external pin. ? 8-bit auto-reload counter/timer mode ? 13-bit counter/timer mode ? 16-bit counter/timer mode ? dual 8-bit counter/timer mode (timer 0) timer 2, timer 3, timer 4, and timer 5 are 16-bit timers including the following features: ? clock sources for all timers include sysclk, sysclk divided by 12, or the external clock divided by 8 ? lfosc0 divided by 8 may be used to clock timer 3 and timer 4 in active or suspend/snooze power modes ? timer 4 is a low-power wake source, and can be chained together with timer 3 ? 16-bit auto-reload timer mode ? dual 8-bit auto-reload timer mode ? external pin capture ? lfosc0 capture ? comparator 0 capture ? configurable logic output capture watchdog timer (wdt0) the device includes a programmable watchdog timer (wdt) running off the low-frequency oscillator. a wdt overflow forces the mcu into the reset state. to prevent the reset, the wdt must be restarted by application software before overflow. if the system experiences a software or hardware malfunction preventing the software from restarting the wdt, the wdt overflows and causes a reset. following a reset, the wdt is automatically enabled and running with the default maximum time interval. if needed, the wdt can be disabled by system software or locked on to prevent accidental disabling. once locked, the wdt cannot be disabled until the next system reset. the state of the rst pin is unaffected by this reset. the watchdog timer has the following features: ? programmable timeout interval ? runs from the low-frequency oscillator ? lock-out feature to prevent any modification until a system reset 3.6 communications and other digital peripherals universal asynchronous receiver/transmitter (uart0) uart0 is an asynchronous, full duplex serial port offering modes 1 and 3 of the standard 8051 uart. enhanced baud rate support allows a wide range of clock sources to generate standard baud rates. received data buffering allows uart0 to start reception of a second incoming data byte before software has finished reading the previous data byte. the uart module provides the following features: ? asynchronous transmissions and receptions ? baud rates up to sysclk/2 (transmit) or sysclk/8 (receive) ? 8- or 9-bit data ? automatic start and stop generation ? single-byte buffer on transmit and receive efm8lb1 data sheet system overview silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 7
universal asynchronous receiver/transmitter (uart1) uart1 is an asynchronous, full duplex serial port offering a variety of data formatting options. a dedicated baud rate generator with a 16-bit timer and selectable prescaler is included, which can generate a wide range of baud rates. a received data fifo allows uart1 to receive multiple bytes before data is lost and an overflow occurs. uart1 provides the following features: ? asynchronous transmissions and receptions ? dedicated baud rate generator supports baud rates up to sysclk/2 (transmit) or sysclk/8 (receive) ? 5, 6, 7, 8, or 9 bit data ? automatic start and stop generation ? automatic parity generation and checking ? single-byte buffer on transmit and receive ? auto-baud detection ? lin break and sync field detection ? cts / rts hardware flow control serial peripheral interface (spi0) the serial peripheral interface (spi) module provides access to a flexible, full-duplex synchronous serial bus. the spi can operate as a master or slave device in both 3-wire or 4-wire modes, and supports multiple masters and slaves on a single spi bus. the slave-select (nss) signal can be configured as an input to select the spi in slave mode, or to disable master mode operation in a multi-master environment, avoiding contention on the spi bus when more than one master attempts simultaneous data transfers. nss can also be configured as a firmware-controlled chip-select output in master mode, or disabled to reduce the number of pins required. additional general purpose port i/o pins can be used to select multiple slave devices in master mode. ? supports 3- or 4-wire master or slave modes ? supports external clock frequencies up to 12 mbps in master or slave mode ? support for all clock phase and polarity modes ? 8-bit programmable clock rate (master) ? programmable receive timeout (slave) ? two byte fifo on transmit and receive ? can operate in suspend or snooze modes and wake the cpu on reception of a byte ? support for multiple masters on the same data lines system management bus / i2c (smb0) the smbus i/o interface is a two-wire, bi-directional serial bus. the smbus is compliant with the system management bus specifica- tion, version 1.1, and compatible with the i 2 c serial bus. the smbus module includes the following features: ? standard (up to 100 kbps) and fast (400 kbps) transfer speeds ? support for master, slave, and multi-master modes ? hardware synchronization and arbitration for multi-master mode ? clock low extending (clock stretching) to interface with faster masters ? hardware support for 7-bit slave and general call address recognition ? firmware support for 10-bit slave address decoding ? ability to inhibit all slave states ? programmable data setup/hold times ? transmit and receive buffers to help increase throughput in faster applications efm8lb1 data sheet system overview silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 8
i2c slave (i2cslave0) the i2c slave interface is a 2-wire, bidirectional serial bus that is compatible with the i2c bus specification 3.0. it is capable of transfer- ring in high-speed mode (hs-mode) at speeds of up to 3.4 mbps. firmware can write to the i2c interface, and the i2c interface can autonomously control the serial transfer of data. the interface also supports clock stretching for cases where the core may be tempora- rily prohibited from transmitting a byte or processing a received byte during an i2c transaction. this module operates only as an i2c slave device. the i2c module includes the following features: ? standard (up to 100 kbps), fast (400 kbps), fast plus (1 mbps), and high-speed (3.4 mbps) transfer speeds ? support for slave mode only ? clock low extending (clock stretching) to interface with faster masters ? hardware support for 7-bit slave address recognition ? hardware support for multiple slave addresses with the option to save the matching address in the receive fifo 16-bit crc (crc0) the cyclic redundancy check (crc) module performs a crc using a 16-bit polynomial. crc0 accepts a stream of 8-bit data and posts the 16-bit result to an internal register. in addition to using the crc block for data manipulation, hardware can automatically crc the flash contents of the device. the crc module is designed to provide hardware calculations for flash memory verification and communications protocols. the crc module supports the standard ccitt-16 16-bit polynomial (0x1021), and includes the following features: ? support for ccitt-16 polynomial ? byte-level bit reversal ? automatic crc of flash contents on one or more 256-byte blocks ? initial seed selection of 0x0000 or 0xffff configurable logic units (clu0, clu1, clu2, and clu3) the configurable logic block consists of multiple configurable logic units (clus). clus are flexible logic functions which may be used for a variety of digital functions, such as replacing system glue logic, aiding in the generation of special waveforms, or synchronizing system event triggers. ? four configurable logic units (clus), with direct-pin and internal logic connections ? each unit supports 256 different combinatorial logic functions (and, or, xor, muxing, etc.) and includes a clocked flip-flop for syn- chronous operations ? units may be operated synchronously or asynchronously ? may be cascaded together to perform more complicated logic functions ? can operate in conjunction with serial peripherals such as uart and spi or timing peripherals such as timers and pca channels ? can be used to synchronize and trigger multiple on-chip resources (adc, dac, timers, etc.) ? asynchronous output may be used to wake from low-power states efm8lb1 data sheet system overview silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 9
3.7 analog 14/12/10-bit analog-to-digital converter (adc0) the adc is a successive-approximation-register (sar) adc with 14-, 12-, and 10-bit modes, integrated track-and hold and a program- mable window detector. the adc is fully configurable under software control via several registers. the adc may be configured to measure different signals using the analog multiplexer. the voltage reference for the adc is selectable between internal and external reference sources. ? up to 20 external inputs ? single-ended 14-bit, 12-bit and 10-bit modes ? supports an output update rate of up to 1 msps in 12-bit mode ? channel sequencer logic with direct-to-xdata output transfers ? operation in a low power mode at lower conversion speeds ? asynchronous hardware conversion trigger, selectable between software, external i/o and internal timer and configurable logic sour- ces ? output data window comparator allows automatic range checking ? support for output data accumulation ? conversion complete and window compare interrupts supported ? flexible output data formatting ? includes a fully-internal fast-settling 1.65 v reference and an on-chip precision 2.4 / 1.2 v reference, with support for using the sup- ply as the reference, an external reference and signal ground ? integrated factory-calibrated temperature sensor 12-bit digital-to-analog converters (dac0, dac1, dac2, dac3) the dac modules are 12-bit digital-to-analog converters with the capability to synchronize multiple outputs together. the dacs are fully configurable under software control. the voltage reference for the dacs is selectable between internal and external reference sources. ? voltage output with 12-bit performance ? hardware conversion trigger, selectable between software, external i/o and internal timer and configurable logic sources ? outputs may be configured to persist through reset and maintain output state to avoid system disruption ? multiple dac outputs can be synchronized together ? dac pairs (dac0 and 1 or dac2 and 3) support complementary output waveform generation ? outputs may be switched between two levels according to state of configurable logic / pwm input trigger ? flexible input data formatting ? supports references from internal supply, on-chip precision reference, or external vref pin low current comparators (cmp0, cmp1) an analog comparator is used to compare the voltage of two analog inputs, with a digital output indicating which input voltage is higher. external input connections to device i/o pins and internal connections are available through separate multiplexers on the positive and negative inputs. hysteresis, response time, and current consumption may be programmed to suit the specific needs of the application. the comparator includes the following features: ? up to 10 (cmp0) or 9 (cmp1) external positive inputs ? up to 10 (cmp0) or 9 (cmp1) external negative inputs ? additional input options: ? internal connection to ldo output ? direct connection to gnd ? direct connection to vdd ? dedicated 6-bit reference dac ? synchronous and asynchronous outputs can be routed to pins via crossbar ? programmable hysteresis between 0 and 20 mv ? programmable response time ? interrupts generated on rising, falling, or both edges ? pwm output kill feature efm8lb1 data sheet system overview silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 10
3.8 reset sources reset circuitry allows the controller to be easily placed in a predefined default condition. on entry to this reset state, the following occur: ? the core halts program execution. ? module registers are initialized to their defined reset values unless the bits reset only with a power-on reset. ? external port pins are forced to a known state. ? interrupts and timers are disabled. all registers are reset to the predefined values noted in the register descriptions unless the bits only reset with a power-on reset. the contents of ram are unaffected during a reset; any previously stored data is preserved as long as power is not lost. by default, the port i/o latches are reset to 1 in open-drain mode, with weak pullups enabled during and after the reset. optionally, firmware may configure the port i/o, dac outputs, and precision reference to maintain state through system resets other than power-on resets. for supply monitor and power-on resets, the rstb pin is driven low until the device exits the reset state. on exit from the reset state, the program counter (pc) is reset, and the system clock defaults to an internal oscillator. the watchdog timer is enabled, and program execution begins at location 0x0000. reset sources on the device include the following: ? power-on reset ? external reset pin ? comparator reset ? software-triggered reset ? supply monitor reset (monitors vdd supply) ? watchdog timer reset ? missing clock detector reset ? flash error reset 3.9 debugging the efm8lb1 devices include an on-chip silicon labs 2-wire (c2) debug interface to allow flash programming and in-system debug- ging with the production part installed in the end application. the c2 interface uses a clock signal (c2ck) and a bi-directional c2 data signal (c2d) to transfer information between the device and a host system. see the c2 interface specification for details on the c2 protocol. efm8lb1 data sheet system overview silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 11
3.10 bootloader all devices come pre-programmed with a uart0 bootloader. this bootloader resides in the code security page, which is the last page of code flash; it can be erased if it is not needed. the byte before the lock byte is the bootloader signature byte. setting this byte to a value of 0xa5 indicates the presence of the boot- loader in the system. any other value in this location indicates that the bootloader is not present in flash. when a bootloader is present, the device will jump to the bootloader vector after any reset, allowing the bootloader to run. the boot- loader then determines if the device should stay in bootload mode or jump to the reset vector located at 0x0000. when the bootloader is not present, the device will jump to the reset vector of 0x0000 after any reset. bootloader code security page 512 bytes lock byte bootloader signature byte 62.5 kb code (125 x 512 byte pages) read-only 64 bytes reserved bootloader vector reset vector 0x0000 0xffff 0xffc0 0xffbf 0xfbff 0xfc00 0xfbfe 0xf9ff 0xfa00 0xfbfd figure 3.2. flash memory map with bootloader 62.5 kb devices efm8lb1 data sheet system overview silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 12
4. electrical specifications 4.1 electrical characteristics all electrical parameters in all tables are specified under the conditions listed in table 4.1 recommended operating conditions on page 13 , unless stated otherwise. 4.1.1 recommended operating conditions table 4.1. recommended operating conditions parameter symbol test condition min typ max unit operating supply voltage on vdd v dd 2.2 3.6 v operating supply voltage on vio 2, 3 v io tbd v dd v system clock frequency f sysclk 0 73.5 mhz operating ambient temperature t a -40 105 c note: 1. all voltages with respect to gnd 2. in certain package configurations, the vio and vdd supplies are bonded to the same pin. 3. gpio levels are undefined whenever vio is less than 1 v. efm8lb1 data sheet electrical specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 13
4.1.2 power consumption table 4.2. power consumption parameter symbol test condition min typ max unit digital core supply current normal mode-full speed with code executing from flash i dd f sysclk = 72 mhz 2 12.9 15 ma f sysclk = 24.5 mhz 2 4.2 5 ma f sysclk = 1.53 mhz 2 625 1050 a f sysclk = 80 khz 3 155 575 a idle mode-core halted with periph- erals running i dd f sysclk = 72 mhz 2 9.6 10.75 ma f sysclk = 24.5 mhz 2 3.14 3.8 ma f sysclk = 1.53 mhz 2 520 950 a f sysclk = 80 khz 3 135 550 a suspend mode-core halted and high frequency clocks stopped, supply monitor off. i dd lfo running 125 545 a lfo stopped 120 535 a snooze mode-core halted and high frequency clocks stopped. regulator in low-power state, sup- ply monitor off. i dd lfo running 23 430 a lfo stopped 19 425 a stop modecore halted and all clocks stopped,internal ldo on, supply monitor off. i dd 120 535 a shutdown modecore halted and all clocks stopped,internal ldo off, supply monitor off. i dd 0.2 2.1 a analog peripheral supply currents high-frequency oscillator 0 i hfosc0 operating at 24.5 mhz, t a = 25 c 120 135 a high-frequency oscillator 1 i hfosc1 operating at 72 mhz, t a = 25 c tbd tbd a low-frequency oscillator i lfosc operating at 80 khz, t a = 25 c 3.7 6 a adc0 high speed mode 4 i adc 1 msps, 12-bit conversions normal bias settings v dd = 3.0 v tbd tbd a adc0 low power mode 4 i adc high speed mode tbd tbd a low power mode tbd tbd a internal adc0 reference 5 i vreffs high speed mode 700 790 a low power mode 170 210 a efm8lb1 data sheet electrical specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 14
parameter symbol test condition min typ max unit on-chip precision reference i vrefp 75 a temperature sensor i tsense 68 120 a digital-to-analog converters (dac0, dac1, dac2, dac3) 6 i dac 125 a comparators (cmp0, cmp1) i cmp cpmd = 11 0.5 a cpmd = 10 3 a cpmd = 01 10 a cpmd = 00 25 a comparator reference i cpref tbd a voltage supply monitor (vmon0) i vmon 15 20 a note: 1. currents are additive. for example, where i dd is specified and the mode is not mutually exclusive, enabling the functions increa- ses supply current by the specified amount. 2. includes supply current from internal ldo regulator, supply monitor, and high frequency oscillator. 3. includes supply current from internal ldo regulator, supply monitor, and low frequency oscillator. 4. adc0 power excludes internal reference supply current. 5. the internal reference is enabled as-needed when operating the adc in low power mode. total adc + reference current will depend on sampling rate. 6. dac supply current for each enabled da and not including external load on pin. 4.1.3 reset and supply monitor table 4.3. reset and supply monitor parameter symbol test condition min typ max unit vdd supply monitor threshold v vddm 1.85 1.95 2.1 v power-on reset (por) threshold v por rising voltage on vdd 1.4 v falling voltage on vdd 0.75 1.36 v vdd ramp time t rmp time to v dd > 2.2 v 10 s reset delay from por t por relative to v dd > v por 3 10 31 ms reset delay from non-por source t rst time between release of reset source and code execution 50 s rst low time to generate reset t rstl 15 s missing clock detector response time (final rising edge to reset) t mcd f sysclk >1 mhz 0.625 1.2 ms missing clock detector trigger frequency f mcd 7.5 13.5 khz vdd supply monitor turn-on time t mon 2 s efm8lb1 data sheet electrical specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 15
4.1.4 flash memory table 4.4. flash memory parameter symbol test condition min typ max units write time 1 ,2 t write one byte, f sysclk = 24.5 mhz 19 20 21 s erase time 1 ,2 t erase one page, f sysclk = 24.5 mhz 5.2 5.35 5.5 ms v dd voltage during programming 3 v prog 2.2 3.6 v endurance (write/erase cycles) n we 20k 100k cycles note: 1. does not include sequencing time before and after the write/erase operation, which may be multiple sysclk cycles. 2. the internal high-frequency oscillator 0 has a programmable output frequency, which is factory programmed to 24.5 mhz. if user firmware adjusts the oscillator speed, it must be between 22 and 25 mhz during any flash write or erase operation. it is recommended to write the hfo0cal register back to its reset value when writing or erasing flash. 3. flash can be safely programmed at any voltage above the supply monitor threshold (v vddm ). 4. data retention information is published in the quarterly quality and reliability report. 4.1.5 power management timing table 4.5. power management timing parameter symbol test condition min typ max units idle mode wake-up time t idlewk 2 3 sysclks suspend mode wake-up time t sus- pendwk sysclk = hfosc0 clkdiv = 0x00 170 ns snooze mode wake-up time t sleepwk sysclk = hfosc0 clkdiv = 0x00 12 s efm8lb1 data sheet electrical specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 16
4.1.6 internal oscillators table 4.6. internal oscillators parameter symbol test condition min typ max unit high frequency oscillator 0 (24.5 mhz) oscillator frequency f hfosc0 full temperature and supply range 24 24.5 25 mhz power supply sensitivity pss hfos c0 t a = 25 c 0.5 %/v temperature sensitivity ts hfosc0 v dd = 3.0 v 40 ppm/c high frequency oscillator 1 (72 mhz) oscillator frequency f hfosc1 full temperature and supply range 70.5 72 73.5 mhz power supply sensitivity pss hfos c1 t a = 25 c tbd %/v temperature sensitivity ts hfosc1 v dd = 3.0 v tbd ppm/c low frequency oscillator (80 khz) oscillator frequency f lfosc full temperature and supply range 75 80 85 khz power supply sensitivity pss lfosc t a = 25 c 0.05 %/v temperature sensitivity ts lfosc v dd = 3.0 v 65 ppm/c 4.1.7 external clock input table 4.7. external clock input parameter symbol test condition min typ max unit external input cmos clock frequency (at extclk pin) f cmos 0 50 mhz external input cmos clock high time t cmosh 9 ns external input cmos clock low time t cmosl 9 ns efm8lb1 data sheet electrical specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 17
4.1.8 crystal oscillator table 4.8. crystal oscillator parameter symbol test condition min typ max unit crystal frequency f xtal 0.02 25 mhz crystal drive current i xtal xfcn = 0 0.5 a xfcn = 1 1.5 a xfcn = 2 4.8 a xfcn = 3 14 a xfcn = 4 40 a xfcn = 5 120 a xfcn = 6 550 a xfcn = 7 2.6 ma efm8lb1 data sheet electrical specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 18
4.1.9 adc table 4.9. adc parameter symbol test condition min typ max unit resolution n bits 14 bit mode 14 bits 12 bit mode 12 bits 10 bit mode 10 bits throughput rate (high speed mode) f s 14 bit mode 900 ksps 12 bit mode 1 msps 10 bit mode 1.125 msps throughput rate (low power mode) f s 14 bit mode tbd ksps 12 bit mode 350 ksps 10 bit mode tbd ksps tracking time t trk high speed mode 217.8 1 ns low power mode 450 ns power-on time t pwr 1.2 s sar clock frequency f sar high speed mode 18.36 mhz low power mode tbd mhz conversion time 2 t cnv 14-bit conversion, sar clock =18 mhz, system clock = 72 mhz. 0.81 s 12-bit conversion, sar clock =18 mhz, system clock = 72 mhz. 0.7 s 10-bit conversion, sar clock =18 mhz, system clock = 72 mhz. 0.59 s sample/hold capacitor c sar gain = 1 5.2 pf gain = 0.75 3.9 pf gain = 0.5 2.6 pf gain = 0.25 1.3 pf input pin capacitance c in high quality input tbd pf normal input 20 pf input mux impedance r mux high quality input tbd normal input 550 voltage reference range v ref 1 v io v input voltage range 3 v in 0 v ref / gain v efm8lb1 data sheet electrical specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 19
parameter symbol test condition min typ max unit power supply rejection ratio psrr adc tbd db dc performance integral nonlinearity inl 14 bit mode -3.5 4 -1.2 / +5 8.5 4 lsb 12 bit mode -1.9 -0.35 / +1 1.9 lsb 10 bit mode -0.6 0.2 0.6 lsb differential nonlinearity (guaran- teed monotonic) dnl 14 bit mode -1 4 1 2.5 4 lsb 12 bit mode -0.9 0.3 0.9 lsb 10 bit mode -0.5 0.2 0.5 lsb offset error e off 14 bit mode -8 4 -2.5 8 4 lsb 12 bit mode -2 0 2 lsb 10 bit mode -1 0 1 lsb offset temperature coefficient tc off tbd lsb/c slope error e m 14 bit mode -15 4 15 4 lsb 12 bit mode -2.5 2.5 lsb 10 bit mode -1.1 1.1 lsb dynamic performance 10 khz sine wave input 1 db below full scale, max throughput, using agnd pin signal-to-noise snr 14 bit mode 66 4 72 db 12 bit mode 64 68 db 10 bit mode 59 61 db signal-to-noise plus distortion sndr 14 bit mode 66 4 72 db 12 bit mode 64 68 db 10 bit mode 59 61 db total harmonic distortion (up to 5th harmonic) thd 14 bit mode -74 db 12 bit mode -72 db 10 bit mode -69 db spurious-free dynamic range sfdr 14 bit mode 74 db 12 bit mode 74 db 10 bit mode 71 db note: 1. this time is equivalent to four periods of a clock running at 18 mhz + 2%. 2. conversion time does not include tracking time. total conversion time is: total conversion time = rpt ( adtk + numbits + 1 ) t(sarclk) + ( t(adcclk) 4 ) where rpt is the number of conversions represented by the adrpt field and adcclk is the clock selected for the adc. 3. absolute input pin voltage is limited by the v io supply. 4. measured with characterization data and not production tested. efm8lb1 data sheet electrical specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 20
4.1.10 voltage reference table 4.10. voltage reference parameter symbol test condition min typ max unit internal fast settling reference output voltage (full temperature and supply range) v reffs 1.62 1.65 1.68 v temperature coefficient tc reffs 50 ppm/c turn-on time t reffs 1.5 s power supply rejection psrr ref fs 400 ppm/v on-chip precision reference valid supply range v dd 1.2 v output 2.2 3.6 v 2.4 v output 2.7 3.6 v output voltage v refp 1.2 v output, v dd = 3.3 v, t = 25 c 1.195 1.2 1.205 v 1.2 v output 1.18 1.2 1.22 v 2.4 v output, v dd = 3.3 v, t = 25 c 2.39 2.4 2.41 v 2.4 v output 2.36 2.4 2.44 v turn-on time, settling to 0.5 lsb t vrefp 4.7 f tantalum + 0.1 f ceramic bypass on vref pin 3 ms 0.1 f ceramic bypass on vref pin 100 s load regulation lr vrefp load = 0 to 200 a to gnd tbd v/a load capacitor c vrefp load = 0 to 200 a to gnd 0.1 f short-circuit current isc vrefp 8 ma power supply rejection psrr vre fp tbd ppm/v external reference input current i extref adc sample rate = 1 msps; vref = 3.0 v 5 a efm8lb1 data sheet electrical specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 21
4.1.11 temperature sensor table 4.11. temperature sensor parameter symbol test condition min typ max unit uncalibrated offset v off t a = 0 c 749 mv uncalibrated offset error 1 e off t a = 0 c 19 mv slope m 2.835 mv/c slope error 1 e m 25 v/c linearity tbd c turn-on time tbd s temp sensor error using typical slope and factory-calibrated off- set 2, 3 t = 0 c to 70 c tbd tbd c t = -20 c to 85 c -3 3 c t = -40 c to 105 c tbd tbd c note: 1. represents one standard deviation from the mean. 2. the factory-calibrated offset value is stored in the read-only area of flash in locations 0xffd4 (low byte) and 0xffd5 (high byte). the 14-bit result represents the output of the adc when sampling the temp sensor using the 1.65 v internal voltage reference. 3. temp sensor error is based upon characterization and is not tested across temperature in production. the values represent three standard deviations above and below the mean. efm8lb1 data sheet electrical specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 22
4.1.12 dacs table 4.12. dacs parameter symbol test condition min typ max unit resolution n bits 12 bits throughput rate f s 200 ksps integral nonlinearity inl tbd tbd tbd lsb differential nonlinearity dnl tbd tbd lsb output noise vref = 2.4 v f s = 0.1 hz to 300 khz 110 v rms slew rate slew 1 v/s output settling time to 1% full- scale t settle v out change between 25% and 75% full scale 2.6 5 s power-on time t pwr 10 s voltage reference range v ref 1.15 v dd v power supply rejection ratio psrr dc, v out = 50% full scale 78 db total harmonic distortion thd v out = 10 khz sine wave, 10% to 90% tbd db offset error e off vref = 2.4 v -8 0 8 lsb full-scale error e fs vref = 2.4 v -13 5 13 lsb external load impedance r load 2 k external load capacitance c load tbd 100 pf load regulation v out = 50% full scale i out = -2 to 2 ma 100 tbd v/ma efm8lb1 data sheet electrical specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 23
4.1.13 comparators table 4.13. comparators parameter symbol test condition min typ max unit response time, cpmd = 00 (highest speed) t resp0 +100 mv differential 100 ns -100 mv differential 150 ns response time, cpmd = 11 (low- est power) t resp3 +100 mv differential 1.5 s -100 mv differential 3.5 s positive hysteresis mode 0 (cpmd = 00) hys cp+ cphyp = 00 0.4 mv cphyp = 01 8 mv cphyp = 10 16 mv cphyp = 11 32 mv negative hysteresis mode 0 (cpmd = 00) hys cp- cphyn = 00 -0.4 mv cphyn = 01 -8 mv cphyn = 10 -16 mv cphyn = 11 -32 mv positive hysteresis mode 1 (cpmd = 01) hys cp+ cphyp = 00 0.5 mv cphyp = 01 6 mv cphyp = 10 12 mv cphyp = 11 24 mv negative hysteresis mode 1 (cpmd = 01) hys cp- cphyn = 00 -0.5 mv cphyn = 01 -6 mv cphyn = 10 -12 mv cphyn = 11 -24 mv positive hysteresis mode 2 (cpmd = 10) hys cp+ cphyp = 00 0.7 mv cphyp = 01 4.5 mv cphyp = 10 9 mv cphyp = 11 18 mv negative hysteresis mode 2 (cpmd = 10) hys cp- cphyn = 00 -0.6 mv cphyn = 01 -4.5 mv cphyn = 10 -9 mv cphyn = 11 -18 mv positive hysteresis mode 3 (cpmd = 11) hys cp+ cphyp = 00 1.5 mv cphyp = 01 4 mv cphyp = 10 8 mv cphyp = 11 16 mv efm8lb1 data sheet electrical specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 24
parameter symbol test condition min typ max unit negative hysteresis mode 3 (cpmd = 11) hys cp- cphyn = 00 -1.5 mv cphyn = 01 -4 mv cphyn = 10 -8 mv cphyn = 11 -16 mv input range (cp+ or cp-) v in -0.25 v io +0.25 v input pin capacitance c cp 7.5 pf internal reference dac resolution n bits 6 bits common-mode rejection ratio cmrr cp 70 db power supply rejection ratio psrr cp 72 db input offset voltage v off t a = 25 c -10 0 10 mv input offset tempco tc off 3.5 v/ 4.1.14 configurable logic table 4.14. configurable logic parameter symbol test condition min typ max unit propagation delay t dly through single clu 35.3 ns clocking frequency f clk 1 or 2 clus cascaded 73.5 mhz 3 or 4 clus cascaded 36.75 mhz efm8lb1 data sheet electrical specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 25
4.1.15 port i/o table 4.15. port i/o parameter symbol test condition min typ max unit output high voltage (high drive) v oh i oh = -7 ma, v io 3.0 v v io - 0.7 v i oh = -3.3 ma, 2.2 v v io < 3.0 v i oh = -1.8 ma, 1.71 v v io < 2.2 v v io x 0.8 v output low voltage (high drive) v ol i ol = 13.5 ma, v io 3.0 v 0.6 v i ol = 7 ma, 2.2 v v io < 3.0 v i ol = 3.6 ma, 1.71 v v io < 2.2 v v io x 0.2 v output high voltage (low drive) v oh i oh = -4.75 ma, v io 3.0 v v io - 0.7 v i oh = -2.25 ma, 2.2 v v io < 3.0 v i oh = -1.2 ma, 1.71 v v io < 2.2 v v io x 0.8 v output low voltage (low drive) v ol i ol = 6.5 ma, v io 3.0 v 0.6 v i ol = 3.5 ma, 2.2 v v io < 3.0 v i ol = 1.8 ma, 1.71 v v io < 2.2 v v io x 0.2 v input high voltage v ih 0.7 x v io v input low voltage v il 0.3 x v io v pin capacitance c io 7 pf weak pull-up current (v in = 0 v) i pu v dd = 3.6 -30 -20 -10 a input leakage (pullups off or ana- log) i lk gnd < v in < v io tbd tbd a input leakage current with v in above v io i lk v io < v in < v io +2.5 v any pin except p3.0, p3.1, p3.2, or p3.3 0 5 150 a efm8lb1 data sheet electrical specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 26
4.2 thermal conditions table 4.16. thermal conditions parameter symbol test condition min typ max unit thermal resistance ja qfn24 packages tbd c/w qfn32 packages tbd c/w qfp32 packages 80 c/w qsop24 packages 65 c/w note: 1. thermal resistance assumes a multi-layer pcb with any exposed pad soldered to a pcb pad. 4.3 absolute maximum ratings stresses above those listed in table 4.17 absolute maximum ratings on page 27 may cause permanent damage to the device. this is a stress rating only and functional operation of the devices at those or any other conditions above those indicated in the operation listings of this specification is not implied. exposure to maximum rating conditions for extended periods may affect device reliability. for more information on the available quality and reliability data, see the quality and reliability monitor report at http://www.silabs.com/ support/quality/pages/default.aspx . table 4.17. absolute maximum ratings parameter symbol test condition min max unit ambient temperature under bias t bias -55 125 c storage temperature t stg -65 150 c voltage on vdd v dd gnd-0.3 4.2 v voltage on vio 2 v io gnd-0.3 v dd +0.3 v voltage on i/o pins or rstb, excluding p2.0-p2.3 (qfn24 and qsop24) or p3.0-p3.3 (qfn32 and qfp32) v in v io > tbd v gnd-0.3 tbd v v io < tbd v gnd-0.3 tbd v voltage on p2.0-p2.3 (qfn24 and qsop24) or p3.0-p3.3 (qfn32 and qfp32) v in gnd-0.3 v dd +0.3 v total current sunk into supply pin i vdd 400 ma total current sourced out of ground pin i gnd 400 ma current sourced or sunk by any i/o pin or rstb i io -100 100 ma note: 1. exposure to maximum rating conditions for extended periods may affect device reliability. 2. in certain package configurations, the vio and vdd supplies are bonded to the same pin. efm8lb1 data sheet electrical specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 27
5. typical connection diagrams 5.1 power figure 5.1 power connection diagram on page 28 shows a typical connection diagram for the power pins of the device. efm8lb1 device vio gnd 4.7 f and 0.1 f bypass capacitors required for each power pin placed as close to the pins as possible. 2.2 - 3.6 v 1.8 - vdd v vdd figure 5.1. power connection diagram efm8lb1 data sheet typical connection diagrams silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 28
5.2 debug the diagram below shows a typical connection diagram for the debug connections pins. the pin sharing resistors are only required if the functionality on the c2d (a gpio pin) and the c2ck (rstb) is routed to external circuitry. for example, if the rstb pin is connec- ted to an external switch with debouncing filter or if the gpio sharing with the c2d pin is connected to an external circuit, the pin shar- ing resistors and connections to the debug adapter must be placed on the hardware. otherwise, these components and connections can be omitted. for more information on debug connections, see the example schematics and information available in an127: "pin sharing techniques for the c2 interface." application notes can be found on the silicon labs website ( http://www.silabs.com/8bit-appnotes ) or in simplicity studio. efm8lb1 device external system (if pin sharing) 1 k 1 k (if pin sharing) c2ck 1 k 1 k debug adapter 1 k vio c2d gnd figure 5.2. debug connection diagram 5.3 other connections other components or connections may be required to meet the system-level requirements. application note an203: "8-bit mcu printed circuit board design notes" contains detailed information on these connections. application notes can be accessed on the silicon labs website ( www.silabs.com/8bit-appnotes ). efm8lb1 data sheet typical connection diagrams silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 29
6. pin definitions 6.1 efm8lb1x-qfn32 pin definitions 32 pin qfn (top view) 17 25 16 8 32 31 30 29 28 27 26 1 2 3 4 5 6 7 9 10 11 12 13 14 15 24 23 22 21 20 19 18 p0.0 vio vdd rstb / c2ck p3.7 / c2d p3.4 p3.3 p3.2 p3.1 p3.0 p2.4 p2.3 p2.2 p2.1 p1.7 p2.0 p1.1 p1.2 p1.3 p1.4 p1.5 p1.6 p0.7 p1.0 p0.1 p0.2 p0.3 p0.4 p0.5 p0.6 gnd p2.6 p2.5 figure 6.1. efm8lb1x-qfn32 pinout efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 30
table 6.1. pin definitions for efm8lb1x-qfn32 pin number pin name description crossbar capability additional digital functions analog functions 1 p0.0 multifunction i/o yes p0mat.0 int0.0 int1.0 clu0a.8 clu2a.8 clu3b.8 vref 2 vio i/o supply power input 3 vdd supply power input 4 rstb / c2ck active-low reset / c2 debug clock 5 p3.7 / c2d multifunction i/o / c2 debug data 6 p3.4 multifunction i/o 7 p3.3 multifunction i/o dac3 8 p3.2 multifunction i/o dac2 9 p3.1 multifunction i/o dac1 10 p3.0 multifunction i/o dac0 11 p2.6 multifunction i/o adc0.19 cmp1p.8 cmp1n.8 12 p2.5 multifunction i/o clu3out adc0.18 cmp1p.7 cmp1n.7 13 p2.4 multifunction i/o adc0.17 cmp1p.6 cmp1n.6 14 p2.3 multifunction i/o yes p2mat.3 clu1b.15 clu2b.15 clu3a.15 adc0.16 cmp1p.5 cmp1n.5 efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 31
pin number pin name description crossbar capability additional digital functions analog functions 15 p2.2 multifunction i/o yes p2mat.2 clu2out clu1a.15 clu2b.14 clu3a.14 adc0.15 cmp1p.4 cmp1n.4 16 p2.1 multifunction i/o yes p2mat.1 i2c0_scl clu1b.14 clu2a.15 clu3b.15 adc0.14 cmp1p.3 cmp1n.3 17 p2.0 multifunction i/o yes p2mat.0 i2c0_sda clu1a.14 clu2a.14 clu3b.14 cmp1p.2 cmp1n.2 18 p1.7 multifunction i/o yes p1mat.7 clu0b.15 clu1b.13 clu2a.13 adc0.13 cmp0p.9 cmp0n.9 19 p1.6 multifunction i/o yes p1mat.6 clu0a.15 clu1b.12 clu2a.12 adc0.12 20 p1.5 multifunction i/o yes p1mat.5 clu0b.14 clu1a.13 clu2b.13 adc0.11 21 p1.4 multifunction i/o yes p1mat.4 clu0a.14 clu1a.12 clu2b.12 adc0.10 22 p1.3 multifunction i/o yes p1mat.3 clu0b.13 clu1b.11 clu2b.11 clu3a.13 adc0.9 efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 32
pin number pin name description crossbar capability additional digital functions analog functions 23 p1.2 multifunction i/o yes p1mat.2 clu0a.13 clu1a.11 clu2b.10 clu3a.12 adc0.8 cmp0p.8 cmp0n.8 24 p1.1 multifunction i/o yes p1mat.1 clu0b.12 clu1b.10 clu2a.11 clu3b.13 adc0.7 cmp0p.7 cmp0n.7 25 p1.0 multifunction i/o yes p1mat.0 clu1out clu0a.12 clu1a.10 clu2a.10 clu3b.12 adc0.6 cmp0p.6 cmp0n.6 cmp1p.1 cmp1n.1 26 p0.7 multifunction i/o yes p0mat.7 int0.7 int1.7 clu0b.11 clu1b.9 clu3a.11 adc0.5 cmp0p.5 cmp0n.5 cmp1p.0 cmp1n.0 27 p0.6 multifunction i/o yes p0mat.6 cnvstr int0.6 int1.6 clu0a.11 clu1b.8 clu3a.10 adc0.4 cmp0p.4 cmp0n.4 28 p0.5 multifunction i/o yes p0mat.5 int0.5 int1.5 uart0_rx clu0b.10 clu1a.9 clu3b.11 adc0.3 cmp0p.3 cmp0n.3 efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 33
pin number pin name description crossbar capability additional digital functions analog functions 29 p0.4 multifunction i/o yes p0mat.4 int0.4 int1.4 uart0_tx clu0a.10 clu1a.8 clu3b.10 adc0.2 cmp0p.2 cmp0n.2 30 p0.3 multifunction i/o yes p0mat.3 extclk int0.3 int1.3 clu0b.9 clu2b.9 clu3a.9 xtal2 31 p0.2 multifunction i/o yes p0mat.2 int0.2 int1.2 clu0out clu0a.9 clu2b.8 clu3a.8 xtal1 adc0.1 cmp0p.1 cmp0n.1 32 p0.1 multifunction i/o yes p0mat.1 int0.1 int1.1 clu0b.8 clu2a.9 clu3b.9 adc0.0 cmp0p.0 cmp0n.0 agnd center gnd ground efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 34
6.2 efm8lb1x-qfp32 pin definitions 24 23 22 21 20 19 18 17 p0.0 gnd vio vdd rstb / c2ck p3.7 / c2d p3.3 p3.2 p3.1 p3.0 p2.6 p2.5 p2.4 p2.3 p2.2 p2.1 p1.1 p1.2 p1.3 p1.4 p1.5 p1.6 p1.7 p2.0 p0.1 p0.2 p0.3 p0.4 p0.5 p0.6 p0.7 p1.0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 32 pin qfp figure 6.2. efm8lb1x-qfp32 pinout table 6.2. pin definitions for efm8lb1x-qfp32 pin number pin name description crossbar capability additional digital functions analog functions 1 p0.0 multifunction i/o yes p0mat.0 int0.0 int1.0 clu0a.8 clu2a.8 clu3b.8 vref 2 gnd ground 3 vio i/o supply power input 4 vdd supply power input 5 rstb / c2ck active-low reset / c2 debug clock efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 35
pin number pin name description crossbar capability additional digital functions analog functions 6 p3.7 / c2d multifunction i/o / c2 debug data 7 p3.3 multifunction i/o dac3 8 p3.2 multifunction i/o dac2 9 p3.1 multifunction i/o dac1 10 p3.0 multifunction i/o dac0 11 p2.6 multifunction i/o adc0.19 cmp1p.8 cmp1n.8 12 p2.5 multifunction i/o clu3out adc0.18 cmp1p.7 cmp1n.7 13 p2.4 multifunction i/o adc0.17 cmp1p.6 cmp1n.6 14 p2.3 multifunction i/o yes p2mat.3 clu1b.15 clu2b.15 clu3a.15 adc0.16 cmp1p.5 cmp1n.5 15 p2.2 multifunction i/o yes p2mat.2 clu2out clu1a.15 clu2b.14 clu3a.14 adc0.15 cmp1p.4 cmp1n.4 16 p2.1 multifunction i/o yes p2mat.1 i2c0_scl clu1b.14 clu2a.15 clu3b.15 adc0.14 cmp1p.3 cmp1n.3 17 p2.0 multifunction i/o yes p2mat.0 i2c0_sda clu1a.14 clu2a.14 clu3b.14 cmp1p.2 cmp1n.2 efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 36
pin number pin name description crossbar capability additional digital functions analog functions 18 p1.7 multifunction i/o yes p1mat.7 clu0b.15 clu1b.13 clu2a.13 adc0.13 cmp0p.9 cmp0n.9 19 p1.6 multifunction i/o yes p1mat.6 clu0a.15 clu1b.12 clu2a.12 adc0.12 20 p1.5 multifunction i/o yes p1mat.5 clu0b.14 clu1a.13 clu2b.13 adc0.11 21 p1.4 multifunction i/o yes p1mat.4 clu0a.14 clu1a.12 clu2b.12 adc0.10 22 p1.3 multifunction i/o yes p1mat.3 clu0b.13 clu1b.11 clu2b.11 clu3a.13 adc0.9 23 p1.2 multifunction i/o yes p1mat.2 clu0a.13 clu1a.11 clu2b.10 clu3a.12 adc0.8 cmp0p.8 cmp0n.8 24 p1.1 multifunction i/o yes p1mat.1 clu0b.12 clu1b.10 clu2a.11 clu3b.13 adc0.7 cmp0p.7 cmp0n.7 efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 37
pin number pin name description crossbar capability additional digital functions analog functions 25 p1.0 multifunction i/o yes p1mat.0 clu1out clu0a.12 clu1a.10 clu2a.10 clu3b.12 adc0.6 cmp0p.6 cmp0n.6 cmp1p.1 cmp1n.1 26 p0.7 multifunction i/o yes p0mat.7 int0.7 int1.7 clu0b.11 clu1b.9 clu3a.11 adc0.5 cmp0p.5 cmp0n.5 cmp1p.0 cmp1n.0 27 p0.6 multifunction i/o yes p0mat.6 cnvstr int0.6 int1.6 clu0a.11 clu1b.8 clu3a.10 adc0.4 cmp0p.4 cmp0n.4 28 p0.5 multifunction i/o yes p0mat.5 int0.5 int1.5 uart0_rx clu0b.10 clu1a.9 clu3b.11 adc0.3 cmp0p.3 cmp0n.3 29 p0.4 multifunction i/o yes p0mat.4 int0.4 int1.4 uart0_tx clu0a.10 clu1a.8 clu3b.10 adc0.2 cmp0p.2 cmp0n.2 efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 38
pin number pin name description crossbar capability additional digital functions analog functions 30 p0.3 multifunction i/o yes p0mat.3 extclk int0.3 int1.3 clu0b.9 clu2b.9 clu3a.9 xtal2 31 p0.2 multifunction i/o yes p0mat.2 int0.2 int1.2 clu0out clu0a.9 clu2b.8 clu3a.8 xtal1 adc0.1 cmp0p.1 cmp0n.1 32 p0.1 multifunction i/o yes p0mat.1 int0.1 int1.1 clu0b.8 clu2a.9 clu3b.9 adc0.0 cmp0p.0 cmp0n.0 agnd efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 39
6.3 efm8lb1x-qfn24 pin definitions 24 23 22 21 2 3 4 5 8 9 10 11 18 17 16 15 13 19 6 14 20 12 24 pin qfn (top view) p0.1 p0.0 gnd vdd / vio rstb / c2ck p2.3 p0.7 p1.0 p1.1 p1.2 gnd p1.4 p0.2 p0.3 p0.4 p0.5 gnd 1 7 p2.2 p2.1 p2.0 p1.6 p3.0 / c2d p1.3 p0.6 p1.5 figure 6.3. efm8lb1x-qfn24 pinout table 6.3. pin definitions for efm8lb1x-qfn24 pin number pin name description crossbar capability additional digital functions analog functions 1 p0.1 multifunction i/o yes p0mat.1 int0.1 int1.1 clu0b.8 clu2a.9 clu3b.9 adc0.0 cmp0p.0 cmp0n.0 agnd efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 40
pin number pin name description crossbar capability additional digital functions analog functions 2 p0.0 multifunction i/o yes p0mat.0 int0.0 int1.0 clu0a.8 clu2a.8 clu3b.8 vref 3 gnd ground 4 vdd / vio supply power input 5 rstb / c2ck active-low reset / c2 debug clock 6 p3.0 / c2d multifunction i/o / c2 debug data 7 p2.3 multifunction i/o yes p2mat.3 clu1b.15 clu2b.15 clu3a.15 dac3 8 p2.2 multifunction i/o yes p2mat.2 clu1a.15 clu2b.14 clu3a.14 dac2 9 p2.1 multifunction i/o yes p2mat.1 clu1b.14 clu2a.15 clu3b.15 dac1 10 p2.0 multifunction i/o yes p2mat.0 clu1a.14 clu2a.14 clu3b.14 dac0 11 p1.6 multifunction i/o yes p1mat.6 clu3out clu0a.15 clu1b.12 clu2a.12 adc0.11 cmp1p.5 cmp1n.5 efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 41
pin number pin name description crossbar capability additional digital functions analog functions 12 p1.5 multifunction i/o yes p1mat.5 clu2out clu0b.14 clu1a.13 clu2b.13 adc0.10 cmp1p.4 cmp1n.4 13 p1.4 multifunction i/o yes p1mat.4 i2c0_scl clu0a.14 clu1a.12 clu2b.12 adc0.9 cmp1p.3 cmp1n.3 14 p1.3 multifunction i/o yes p1mat.3 i2c0_sda clu0b.13 clu1b.11 clu2b.11 clu3a.13 cmp1p.2 cmp1n.2 15 gnd ground 16 p1.2 multifunction i/o yes p1mat.2 clu0a.13 clu1a.11 clu2b.10 clu3a.12 adc0.8 17 p1.1 multifunction i/o yes p1mat.1 clu0b.12 clu1b.10 clu2a.11 clu3b.13 adc0.7 18 p1.0 multifunction i/o yes p1mat.0 clu0a.12 clu1a.10 clu2a.10 clu3b.12 adc0.6 efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 42
pin number pin name description crossbar capability additional digital functions analog functions 19 p0.7 multifunction i/o yes p0mat.7 int0.7 int1.7 clu1out clu0b.11 clu1b.9 clu3a.11 adc0.5 cmp0p.5 cmp0n.5 cmp1p.1 cmp1n.1 20 p0.6 multifunction i/o yes p0mat.6 cnvstr int0.6 int1.6 clu0a.11 clu1b.8 clu3a.10 adc0.4 cmp0p.4 cmp0n.4 cmp1p.0 cmp1n.0 21 p0.5 multifunction i/o yes p0mat.5 int0.5 int1.5 uart0_rx clu0b.10 clu1a.9 clu3b.11 adc0.3 cmp0p.3 cmp0n.3 22 p0.4 multifunction i/o yes p0mat.4 int0.4 int1.4 uart0_tx clu0a.10 clu1a.8 clu3b.10 adc0.2 cmp0p.2 cmp0n.2 23 p0.3 multifunction i/o yes p0mat.3 extclk int0.3 int1.3 clu0b.9 clu2b.9 clu3a.9 xtal2 efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 43
pin number pin name description crossbar capability additional digital functions analog functions 24 p0.2 multifunction i/o yes p0mat.2 int0.2 int1.2 clu0out clu0a.9 clu2b.8 clu3a.8 xtal1 adc0.1 cmp0p.1 cmp0n.1 center gnd ground efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 44
6.4 efm8lb1x-qsop24 pin definitions p0.2 p0.1 p0.0 gnd vdd / vio rstb / c2ck p3.0 / c2d p1.7 p0.4 p0.5 p0.6 p0.7 p1.0 p1.1 p1.2 p1.3 p1.4 p1.5 p1.6 2 1 4 3 5 6 7 24 pin qsop (top view) 8 9 10 11 12 23 24 21 22 20 19 18 17 16 15 14 13 p0.3 p2.0 p2.1 p2.2 p2.3 figure 6.4. efm8lb1x-qsop24 pinout table 6.4. pin definitions for efm8lb1x-qsop24 pin number pin name description crossbar capability additional digital functions analog functions 1 p0.3 multifunction i/o yes p0mat.3 extclk int0.3 int1.3 clu0b.9 clu2b.9 clu3a.9 xtal2 efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 45
pin number pin name description crossbar capability additional digital functions analog functions 2 p0.2 multifunction i/o yes p0mat.2 int0.2 int1.2 clu0out clu0a.9 clu2b.8 clu3a.8 xtal1 adc0.1 cmp0p.1 cmp0n.1 3 p0.1 multifunction i/o yes p0mat.1 int0.1 int1.1 clu0b.8 clu2a.9 clu3b.9 adc0.0 cmp0p.0 cmp0n.0 agnd 4 p0.0 multifunction i/o yes p0mat.0 int0.0 int1.0 clu0a.8 clu2a.8 clu3b.8 vref 5 gnd ground 6 vdd / vio supply power input 7 rstb / c2ck active-low reset / c2 debug clock 8 p3.0 / c2d multifunction i/o / c2 debug data 9 p2.3 multifunction i/o yes p2mat.3 clu1b.15 clu2b.15 clu3a.15 dac3 10 p2.2 multifunction i/o yes p2mat.2 clu1a.15 clu2b.14 clu3a.14 dac2 efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 46
pin number pin name description crossbar capability additional digital functions analog functions 11 p2.1 multifunction i/o yes p2mat.1 clu1b.14 clu2a.15 clu3b.15 dac1 12 p2.0 multifunction i/o yes p2mat.0 clu1a.14 clu2a.14 clu3b.14 dac0 13 p1.7 multifunction i/o yes p1mat.7 clu0b.15 clu1b.13 clu2a.13 adc0.12 cmp1p.6 cmp1n.6 14 p1.6 multifunction i/o yes p1mat.6 clu3out clu0a.15 clu1b.12 clu2a.12 adc0.11 cmp1p.5 cmp1n.5 15 p1.5 multifunction i/o yes p1mat.5 clu2out clu0b.14 clu1a.13 clu2b.13 adc0.10 cmp1p.4 cmp1n.4 16 p1.4 multifunction i/o yes p1mat.4 i2c0_scl clu0a.14 clu1a.12 clu2b.12 adc0.9 cmp1p.3 cmp1n.3 17 p1.3 multifunction i/o yes p1mat.3 i2c0_sda clu0b.13 clu1b.11 clu2b.11 clu3a.13 cmp1p.2 cmp1n.2 efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 47
pin number pin name description crossbar capability additional digital functions analog functions 18 p1.2 multifunction i/o yes p1mat.2 clu0a.13 clu1a.11 clu2b.10 clu3a.12 adc0.8 19 p1.1 multifunction i/o yes p1mat.1 clu0b.12 clu1b.10 clu2a.11 clu3b.13 adc0.7 20 p1.0 multifunction i/o yes p1mat.0 clu0a.12 clu1a.10 clu2a.10 clu3b.12 adc0.6 21 p0.7 multifunction i/o yes p0mat.7 int0.7 int1.7 clu1out clu0b.11 clu1b.9 clu3a.11 adc0.5 cmp0p.5 cmp0n.5 cmp1p.1 cmp1n.1 22 p0.6 multifunction i/o yes p0mat.6 cnvstr int0.6 int1.6 clu0a.11 clu1b.8 clu3a.10 adc0.4 cmp0p.4 cmp0n.4 cmp1p.0 cmp1n.0 23 p0.5 multifunction i/o yes p0mat.5 int0.5 int1.5 uart0_rx clu0b.10 clu1a.9 clu3b.11 adc0.3 cmp0p.3 cmp0n.3 efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 48
pin number pin name description crossbar capability additional digital functions analog functions 24 p0.4 multifunction i/o yes p0mat.4 int0.4 int1.4 uart0_tx clu0a.10 clu1a.8 clu3b.10 adc0.2 cmp0p.2 cmp0n.2 efm8lb1 data sheet pin definitions silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 49
7. qfn32 package specifications 7.1 qfn32 package dimensions figure 7.1. qfn32 package drawing table 7.1. qfn32 package dimensions dimension min typ max a 0.45 0.50 0.55 a1 0.00 0.035 0.05 b 0.15 0.20 0.25 d 4.00 bsc. d2 2.80 2.90 3.00 e 0.40 bsc. e 4.00 bsc. e2 2.80 2.90 3.00 l 0.20 0.30 0.40 aaa 0.10 bbb 0.10 ccc 0.08 ddd 0.10 eee 0.10 ggg 0.05 efm8lb1 data sheet qfn32 package specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 50
dimension min typ max note: 1. all dimensions shown are in millimeters (mm) unless otherwise noted. 2. dimensioning and tolerancing per ansi y14.5m-1994. 3. this drawing conforms to jedec solid state outline mo-220. 4. recommended card reflow profile is per the jedec/ipc j-std-020c specification for small body components. efm8lb1 data sheet qfn32 package specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 51
7.2 qfn32 pcb land pattern figure 7.2. qfn32 pcb land pattern drawing table 7.2. qfn32 pcb land pattern dimensions dimension min max c1 4.00 c2 4.00 x1 0.2 x2 2.8 y1 0.75 y2 2.8 e 0.4 efm8lb1 data sheet qfn32 package specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 52
dimension min max note: 1. all dimensions shown are in millimeters (mm) unless otherwise noted. 2. dimensioning and tolerancing is per the ansi y14.5m-1994 specification. 3. this land pattern design is based on the ipc-7351 guidelines. 4. all dimensions shown are at maximum material condition (mmc). least material condition (lmc) is calculated based on a fabri- cation allowance of 0.05mm. 5. all metal pads are to be non-solder mask defined (nsmd). clearance between the solder mask and the metal pad is to be 60 m minimum, all the way around the pad. 6. a stainless steel, laser-cut and electro-polished stencil with trapezoidal walls should be used to assure good solder paste release. 7. the stencil thickness should be 0.125 mm (5 mils). 8. the ratio of stencil aperture to land pad size should be 1:1 for all perimeter pads. 9. a 2 x 2 array of 1.10 mm square openings on a 1.30 mm pitch should be used for the center pad. 10. a no-clean, type-3 solder paste is recommended. 11. the recommended card reflow profile is per the jedec/ipc j-std-020 specification for small body components. 7.3 qfn32 package marking pppppppp yyww tttttt # efm8 figure 7.3. qfn32 package marking the package marking consists of: ? pppppppp C the part number designation. ? tttttt C a trace or manufacturing code. ? yy C the last 2 digits of the assembly year. ? ww C the 2-digit workweek when the device was assembled. ? # C the device revision (a, b, etc.). efm8lb1 data sheet qfn32 package specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 53
8. qfp32 package specifications 8.1 qfp32 package dimensions figure 8.1. qfp32 package drawing table 8.1. qfp32 package dimensions dimension min typ max a 1.20 a1 0.05 0.15 a2 0.95 1.00 1.05 b 0.30 0.37 0.45 c 0.09 0.20 d 9.00 bsc d1 7.00 bsc e 0.80 bsc e 9.00 bsc e1 7.00 bsc l 0.50 0.60 0.70 efm8lb1 data sheet qfp32 package specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 54
dimension min typ max aaa 0.20 bbb 0.20 ccc 0.10 ddd 0.20 theta 0 3.5 7 note: 1. all dimensions shown are in millimeters (mm) unless otherwise noted. 2. dimensioning and tolerancing per ansi y14.5m-1994. 3. this drawing conforms to jedec outline ms-026. 4. recommended card reflow profile is per the jedec/ipc j-std-020 specification for small body components. efm8lb1 data sheet qfp32 package specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 55
8.2 qfp32 pcb land pattern figure 8.2. qfp32 pcb land pattern drawing table 8.2. qfp32 pcb land pattern dimensions dimension min max c1 8.40 8.50 c2 8.40 8.50 e 0.80 bsc x1 0.55 y1 1.5 note: 1. all dimensions shown are in millimeters (mm) unless otherwise noted. 2. this land pattern design is based on the ipc-7351 guidelines. 3. all metal pads are to be non-solder mask defined (nsmd). clearance between the solder mask and the metal pad is to be 60 m minimum, all the way around the pad. 4. a stainless steel, laser-cut and electro-polished stencil with trapezoidal walls should be used to assure good solder paste release. 5. the stencil thickness should be 0.125 mm (5 mils). 6. the ratio of stencil aperture to land pad size should be 1:1 for all perimeter pads. 7. a no-clean, type-3 solder paste is recommended. 8. the recommended card reflow profile is per the jedec/ipc j-std-020c specification for small body components. efm8lb1 data sheet qfp32 package specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 56
8.3 qfp32 package marking ppppppppppp yywwtttttt# e3 efm8 figure 8.3. qfp32 package marking the package marking consists of: ? pppppppp C the part number designation. ? tttttt C a trace or manufacturing code. ? yy C the last 2 digits of the assembly year. ? ww C the 2-digit workweek when the device was assembled. ? # C the device revision (a, b, etc.). efm8lb1 data sheet qfp32 package specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 57
9. qfn24 package specifications 9.1 qfn24 package dimensions figure 9.1. qfn24 package drawing table 9.1. qfn24 package dimensions dimension min typ max a 0.8 0.85 0.9 a1 0.00 0.05 a2 0.65 a3 0.203 ref b 0.15 0.2 0.25 b1 0.25 0.3 0.35 d 3.00 bsc e 3.00 bsc efm8lb1 data sheet qfn24 package specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 58
dimension min typ max e 0.40 bsc e1 0.45 bsc j 1.60 1.70 1.80 k 1.60 1.70 1.80 l 0.35 0.40 0.45 l1 0.25 0.30 0.35 aaa 0.10 bbb 0.10 ccc 0.08 ddd 0.1 eee 0.1 note: 1. all dimensions shown are in millimeters (mm) unless otherwise noted. 2. dimensioning and tolerancing per ansi y14.5m-1994. 3. this drawing conforms to jedec solid state outline mo-248 but includes custom features which are toleranced per supplier designation. 4. recommended card reflow profile is per the jedec/ipc j-std-020 specification for small body components. efm8lb1 data sheet qfn24 package specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 59
9.2 qfn24 pcb land pattern y2 x2 c1 c2 c x1 y1 c y3 e f figure 9.2. qfn24 pcb land pattern drawing table 9.2. qfn24 pcb land pattern dimensions dimension min max c1 3.00 c2 3.00 e 0.4 ref x1 0.20 x2 1.80 y1 0.80 y2 1.80 y3 0.4 f 2.50 ref c 0.25 0.35 efm8lb1 data sheet qfn24 package specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 60
dimension min max note: 1. all dimensions shown are in millimeters (mm) unless otherwise noted. 2. dimensioning and tolerancing is per the ansi y14.5m-1994 specification. 3. this land pattern design is based on the ipc-sm-782 guidelines. 4. all metal pads are to be non-solder mask defined (nsmd). clearance between the solder mask and the metal pad is to be 60 m minimum, all the way around the pad. 5. a stainless steel, laser-cut and electro-polished stencil with trapezoidal walls should be used to assure good solder paste release. 6. the stencil thickness should be 0.125 mm (5 mils). 7. the ratio of stencil aperture to land pad size should be 1:1 for all perimeter pads. 8. a 2 x 1 array of 1.20 mm x 0.95 mm openings on a 1.15 mm pitch should be used for the center pad. 9. a no-clean, type-3 solder paste is recommended. 10. the recommended card reflow profile is per the jedec/ipc j-std-020 specification for small body components. 9.3 qfn24 package marking pppp pppppp tttttt yyww # figure 9.3. qfn24 package marking the package marking consists of: ? pppppppp C the part number designation. ? tttttt C a trace or manufacturing code. ? yy C the last 2 digits of the assembly year. ? ww C the 2-digit workweek when the device was assembled. ? # C the device revision (a, b, etc.). efm8lb1 data sheet qfn24 package specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 61
10. qsop24 package specifications 10.1 qsop24 package dimensions figure 10.1. qsop24 package drawing table 10.1. qsop24 package dimensions dimension min typ max a 1.75 a1 0.10 0.25 b 0.20 0.30 c 0.10 0.25 d 8.65 bsc e 6.00 bsc e1 3.90 bsc e 0.635 bsc l 0.40 1.27 theta 0o 8o efm8lb1 data sheet qsop24 package specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 62
dimension min typ max aaa 0.20 bbb 0.18 ccc 0.10 ddd 0.10 note: 1. all dimensions shown are in millimeters (mm) unless otherwise noted. 2. dimensioning and tolerancing per ansi y14.5m-1994. 3. this drawing conforms to jedec outline mo-137, variation ae. 4. recommended card reflow profile is per the jedec/ipc j-std-020 specification for small body components. efm8lb1 data sheet qsop24 package specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 63
10.2 qsop24 pcb land pattern figure 10.2. qsop24 pcb land pattern drawing table 10.2. qsop24 pcb land pattern dimensions dimension min max c 5.20 5.30 e 0.635 bsc x 0.30 0.40 y 1.50 1.60 note: 1. all dimensions shown are in millimeters (mm) unless otherwise noted. 2. this land pattern design is based on the ipc-7351 guidelines. 3. all metal pads are to be non-solder mask defined (nsmd). clearance between the solder mask and the metal pad is to be 60 m minimum, all the way around the pad. 4. a stainless steel, laser-cut and electro-polished stencil with trapezoidal walls should be used to assure good solder paste release. 5. the stencil thickness should be 0.125 mm (5 mils). 6. the ratio of stencil aperture to land pad size should be 1:1 for all perimeter pads. 7. a no-clean, type-3 solder paste is recommended. 8. the recommended card reflow profile is per the jedec/ipc j-std-020 specification for small body components. efm8lb1 data sheet qsop24 package specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 64
10.3 qsop24 package marking pppppppp # yywwtttttt efm8 figure 10.3. qsop24 package marking the package marking consists of: ? pppppppp C the part number designation. ? tttttt C a trace or manufacturing code. ? yy C the last 2 digits of the assembly year. ? ww C the 2-digit workweek when the device was assembled. ? # C the device revision (a, b, etc.). efm8lb1 data sheet qsop24 package specifications silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 65
11. revision history 11.1 revision 0.1 initial release. 11.3 revision 0.4 updated specification tables based on current device characterization status and production test limits. added bootloader section. added typical connection diagrams. corrected clu connections in pin function tables. efm8lb1 data sheet revision history silabs.com | smart. connected. energy-friendly. preliminary rev. 0.4 | 66
table of contents 1. feature list ................................ 1 2. ordering information ............................ 2 3. system overview .............................. 4 3.1 introduction ............................... 4 3.2 power ................................ 5 3.3 i/o .................................. 5 3.4 clocking ................................ 6 3.5 counters/timers and pwm ......................... 6 3.6 communications and other digital peripherals ................... 7 3.7 analog ................................ 10 3.8 reset sources ............................. 11 3.9 debugging ............................... 11 3.10 bootloader .............................. 12 4. electrical specifications .......................... 13 4.1 electrical characteristics .......................... 13 4.1.1 recommended operating conditions ..................... 13 4.1.2 power consumption ........................... 14 4.1.3 reset and supply monitor ......................... 15 4.1.4 flash memory ............................. 16 4.1.5 power management timing ........................ 16 4.1.6 internal oscillators ............................ 17 4.1.7 external clock input ........................... 17 4.1.8 crystal oscillator ............................ 18 4.1.9 adc ................................ 19 4.1.10 voltage reference ........................... 21 4.1.11 temperature sensor .......................... 22 4.1.12 dacs ............................... 23 4.1.13 comparators ............................. 24 4.1.14 configurable logic ........................... 25 4.1.15 port i/o ............................... 26 4.2 thermal conditions ............................ 27 4.3 absolute maximum ratings ......................... 27 5. typical connection diagrams ........................ 28 5.1 power ................................ 28 5.2 debug ................................ 29 5.3 other connections ............................ 29 6. pin definitions .............................. 30 6.1 efm8lb1x-qfn32 pin definitions ....................... 30 6.2 efm8lb1x-qfp32 pin definitions ....................... 35 table of contents 67
6.3 efm8lb1x-qfn24 pin definitions ....................... 40 6.4 efm8lb1x-qsop24 pin definitions ...................... 45 7. qfn32 package specifications ........................ 50 7.1 qfn32 package dimensions ........................ 50 7.2 qfn32 pcb land pattern ......................... 52 7.3 qfn32 package marking .......................... 53 8. qfp32 package specifications ........................ 54 8.1 qfp32 package dimensions ........................ 54 8.2 qfp32 pcb land pattern ......................... 56 8.3 qfp32 package marking .......................... 57 9. qfn24 package specifications ........................ 58 9.1 qfn24 package dimensions ........................ 58 9.2 qfn24 pcb land pattern ......................... 60 9.3 qfn24 package marking .......................... 61 10. qsop24 package specifications ...................... 62 10.1 qsop24 package dimensions ....................... 62 10.2 qsop24 pcb land pattern ........................ 64 10.3 qsop24 package marking ......................... 65 11. revision history ............................. 66 11.1 revision 0.1 .............................. 66 11.3 revision 0.4 .............................. 66 table of contents .............................. 67 table of contents 68
disclaimer silicon laboratories intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers using or intending to use the silicon laboratories products. characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific device, and "typical" parameters provided can and do vary in different applications. application examples described herein are for illustrative purposes only. silicon laboratories reserves the right to make changes without further notice and limitation to product information, specifications, and descriptions herein, and does not give warranties as to the accuracy or completeness of the included information. silicon laboratories shall have no liability for the consequences of use of the information supplied herein. this document does not imply or express copyright licenses granted hereunder to design or fabricate any integrated circuits. the products must not be used within any life support system without the specific written consent of silicon laboratories. a "life support system" is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected to result in significant personal injury or death. silicon laboratories products are generally not intended for military applications. silicon laboratories products shall under no circumstances be used in weapons of mass destruction including (but not limited to) nuclear, biological or chemical weapons, or missiles capable of delivering such weapons. trademark information silicon laboratories inc., silicon laboratories, silicon labs, silabs and the silicon labs logo, cmems?, efm, efm32, efr, energy micro, energy micro logo and combinations thereof, "the world?s most energy friendly microcontrollers", ember?, ezlink?, ezmac?, ezradio?, ezradiopro?, dspll?, isomodem ?, precision32?, proslic?, siphy?, usbxpress? and others are trademarks or registered trademarks of silicon laboratories inc. arm, cortex, cortex-m3 and thumb are trademarks or registered trademarks of arm holdings. keil is a registered trademark of arm limited. all other products or brand names mentioned herein are trademarks of their respective holders. http://www.silabs.com silicon laboratories inc. 400 west cesar chavez austin, tx 78701 usa simplicity studio one-click access to mcu tools, documentation, software, source code libraries & more. available for windows, mac and linux! www.silabs.com/simplicity mcu portfolio www.silabs.com/mcu sw/hw www.silabs.com/simplicity quality www.silabs.com/quality support and community community.silabs.com

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