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| Features * Incorporates the ARM7TDMI(R) ARM(R) Thumb(R) Processor - High-performance 32-bit RISC Architecture - High-density 16-bit Instruction Set - Leader in MIPS/Watt - Embedded*ICETM In-circuit Emulation, Debug Communication Channel Support Internal High-speed Flash - 256 kbytes, organized in 1024 Pages of 256 Bytes (AT91SAM7S256) - 128 kbytes, organized in 512 Pages of 256 Bytes (AT91SAM7S128) - 64 kbytes, organized in 512 Pages of 128 Bytes (AT91SAM7S64) - 32 kbytes, organized in 256 Pages of 128 Bytes (AT91SAM7S321/32) - Single Cycle Access at Up to 30 MHz in Worst Case Conditions - Prefetch Buffer Optimizing Thumb Instruction Execution at Maximum Speed - Page Programming Time: 6 ms, Including Page Auto-erase, Full Erase Time: 15 ms - 10,000 Write Cycles, 10-year Data Retention Capability, Sector Lock Capabilities, Flash Security Bit - Fast Flash Programming Interface for High Volume Production Internal High-speed SRAM, Single-cycle Access at Maximum Speed - 64 kbytes (AT91SAM7S256) - 32 kbytes (AT91SAM7S128) - 16 kbytes (AT91SAM7S64) - 8 kbytes (AT91SAM7S321/32) Memory Controller (MC) - Embedded Flash Controller, Abort Status and Misalignment Detection Reset Controller (RSTC) - Based on Power-on Reset and Low-power Factory-calibrated Brown-out Detector - Provides External Reset Signal Shaping and Reset Source Status Clock Generator (CKGR) - Low-power RC Oscillator, 3 to 20 MHz On-chip Oscillator and one PLL Power Management Controller (PMC) - Software Power Optimization Capabilities, Including Slow Clock Mode (Down to 500 Hz) and Idle Mode - Three Programmable External Clock Signals Advanced Interrupt Controller (AIC) - Individually Maskable, Eight-level Priority, Vectored Interrupt Sources - Two (AT91SAM7S256/128/64/321) or One (AT91SAM7S32) External Interrupt Sources and One Fast Interrupt Source, Spurious Interrupt Protected Debug Unit (DBGU) - 2-wire UART and Support for Debug Communication Channel interrupt, Programmable ICE Access Prevention Periodic Interval Timer (PIT) - 20-bit Programmable Counter plus 12-bit Interval Counter Windowed Watchdog (WDT) - 12-bit key-protected Programmable Counter - Provides Reset or Interrupt Signals to the System - Counter May Be Stopped While the Processor is in Debug State or in Idle Mode Real-time Timer (RTT) - 32-bit Free-running Counter with Alarm - Runs Off the Internal RC Oscillator * AT91 ARM(R) Thumb(R)-based Microcontrollers AT91SAM7S256 AT91SAM7S128 AT91SAM7S64 AT91SAM7S321 AT91SAM7S32 * * * * * Summary * * * * * 6175BS-ATARM-04-Nov-05 * One Parallel Input/Output Controller (PIOA) - Thirty-two (AT91SAM7S256/128/64/321) or twenty-one (AT91SAM7S32) Programmable I/O Lines Multiplexed with up to Two Peripheral I/Os - Input Change Interrupt Capability on Each I/O Line - Individually Programmable Open-drain, Pull-up resistor and Synchronous Output Eleven (AT91SAM7S256/128/64/321) or Nine (AT91SAM7S32) Peripheral DMA Controller (PDC) Channels One USB 2.0 Full Speed (12 Mbits per Second) Device Port (Except for the AT91SAM7S32). - On-chip Transceiver, 328-byte Configurable Integrated FIFOs One Synchronous Serial Controller (SSC) - Independent Clock and Frame Sync Signals for Each Receiver and Transmitter - IS Analog Interface Support, Time Division Multiplex Support - High-speed Continuous Data Stream Capabilities with 32-bit Data Transfer Two (AT91SAM7S256/128/64/321) or One (AT91SAM7S32) Universal Synchronous/Asynchronous Receiver Transmitters (USART) - Individual Baud Rate Generator, IrDA(R) Infrared Modulation/Demodulation - Support for ISO7816 T0/T1 Smart Card, Hardware Handshaking, RS485 Support - Manchester Encoder/Decoder (AT91SAM7S256/128) - Full Modem Line Support on USART1 (AT91SAM7S256/128/64/321) One Master/Slave Serial Peripheral Interface (SPI) - 8- to 16-bit Programmable Data Length, Four External Peripheral Chip Selects One Three (AT91SAM7S256/128/64/321)-channel or Two (AT91SAM7S32)-channel 16-bit Timer/Counter (TC) - Three (AT91SAM7S256/128/64/321) or One (AT91SAM7S32) External Clock Inputs, Two Multi-purpose I/O Pins per Channel - Double PWM Generation, Capture/Waveform Mode, Up/Down Capability One Four-channel 16-bit PWM Controller (PWMC) One Two-wire Interface (TWI) - Master Mode Support Only, All Two-wire Atmel EEPROMs Supported One 8-channel 10-bit Analog-to-Digital Converter, Four Channels Multiplexed with Digital I/Os SAM-BATM Boot Assistant - Default Boot program - Interface with SAM-BA Graphic User Interface IEEE 1149.1 JTAG Boundary Scan on All Digital Pins 5V-tolerant I/Os, including Four High-current Drive I/O lines, Up to 16 mA Each Power Supplies - Embedded 1.8V Regulator, Drawing up to 100 mA for the Core and External Components - 3.3V or 1.8V VDDIO I/O Lines Power Supply, Independent 3.3V VDDFLASH Flash Power Supply - 1.8V VDDCORE Core Power Supply with Brown-out Detector Fully Static Operation: Up to 55 MHz at 1.65V and 85 C Worst Case Conditions Available in a 64-lead LQFP Green Package (AT91SAM7S256/128/64/321) and 48-lead LQFP Green Package (AT91SAM7S32) * * * * * * * * * * * * * * * 2 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 AT91SAM7S Series Summary 1. Description Atmel's AT91SAM7S is a series of low pincount Flash microcontrollers based on the 32-bit ARM RISC processor. It features a high-speed Flash and an SRAM, a large set of peripherals, including a USB 2.0 device (except for the AT91SAM7S32), and a complete set of system functions minimizing the number of external components. The device is an ideal migration path for 8-bit microcontroller users looking for additional performance and extended memory. The embedded Flash memory can be programmed in-system via the JTAG-ICE interface or via a parallel interface on a production programmer prior to mounting. Built-in lock bits and a security bit protect the firmware from accidental overwrite and preserves its confidentiality. The AT91SAM7S Series system controller includes a reset controller capable of managing the power-on sequence of the microcontroller and the complete system. Correct device operation can be monitored by a built-in brownout detector and a watchdog running off an integrated RC oscillator. The AT91SAM7S Series are general-purpose microcontrollers. Their integrated USB Device port makes them ideal devices for peripheral applications requiring connectivity to a PC or cellular phone. Their aggressive price point and high level of integration pushes their scope of use far into the cost-sensitive, high-volume consumer market. 2. Configuration Summary of the AT91SAM7S256, AT91SAM7S128, AT91SAM7S64, AT91SAM7S321 and AT91SAM7S32 The AT91SAM7S256, AT91SAM7S128, AT91SAM7S64, AT91SAM7S321 and AT91SAM7S32 differ in memory size, peripheral set and package. Table 2-1 summarizes the configuration of the five devices. Except for the AT91SAM7S32, all other AT91SAM7S devices are package and pinout compatible. Table 2-1. Configuration Summary USB Device Port 1 1 1 1 not present External Interrupt Source 2 2 2 2 1 PDC Channels 11 11 11 11 9 TC Channels 3 3 3 3 2 Device AT91SAM7S256 AT91SAM7S128 AT91SAM7S64 AT91SAM7S321 AT91SAM7S32 Notes: Flash 256K byte 128K byte 64K byte 32K byte 32K byte SRAM 64K byte 32K byte 16K byte 8K byte 8K byte USART 2(1) (2) 2 2 (1) (2) (2) (2) I/O Lines 32 32 32 32 21 Package LQFP 64 LQFP 64 LQFP 64 LQFP 64 LQFP 48 2 1 1. Manchester Encoder/Decoder, Fractional Baud Rate. 2. Full modem line support on USART1. 3 6175BS-ATARM-04-Nov-05 3. Block Diagram Figure 3-1. AT91SAM7S256/128/64/321 Block Diagram TDI TDO TMS TCK JTAGSEL JTAG SCAN ICE ARM7TDMI Processor 1.8 V Voltage Regulator VDDIN GND VDDOUT VDDCORE TST FIQ System Controller AIC PIO IRQ0-IRQ1 Memory Controller Embedded Flash Controller Address Decoder Misalignment Detection VDDIO SRAM 64/32/16/8 Kbytes PCK0-PCK2 PLLRC XIN XOUT PLL OSC RCOSC PMC Abort Status VDDFLASH Flash 256/128/64/32 Kbytes ERASE VDDCORE BOD POR Reset Controller Peripheral Bridge VDDCORE NRST Peripheral Data Controller 11 Channels ROM Fast Flash Programming Interface PIT WDT RTT DRXD DTXD APB PGMRDY PGMNVALID PGMNOE PGMCK PGMM0-PGMM3 PGMD0-PGMD15 PGMNCMD PGMEN0-PGMEN SAM-BA PDC PDC FIFO Transceiver PIO DBGU USB Device DDM DDP PIOA RXD0 TXD0 SCK0 RTS0 CTS0 RXD1 TXD1 SCK1 RTS1 CTS1 DCD1 DSR1 DTR1 RI1 NPCS0 NPCS1 NPCS2 NPCS3 MISO MOSI SPCK ADTRG AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 ADVREF PDC PWMC PDC USART0 PDC PDC SSC PDC USART1 Timer Counter PIO PDC PDC TC0 TC1 SPI PDC PDC TC2 TWI PWM0 PWM1 PWM2 PWM3 TF TK TD RD RK RF TCLK0 TCLK1 TCLK2 TIOA0 TIOB0 TIOA1 TIOB1 TIOA2 TIOB2 TWD TWCK ADC 4 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 PIO AT91SAM7S Series Summary Figure 3-2. AT91SAM7S32 Block Diagram TDI TDO TMS TCK JTAGSEL JTAG SCAN ICE ARM7TDMI Processor 1.8 V Voltage Regulator VDDIN GND VDDOUT TST FIQ System Controller PIO IRQ0 AIC Memory Controller Embedded Flash Controller PLL PMC OSC Abort Status Misalignment Detection Address Decoder VDDCORE VDDIO SRAM 8 Kbytes PCK0-PCK2 PLLRC XIN XOUT VDDFLASH RCOSC Flash 32 Kbytes Peripheral Bridge ERASE VDDCORE BOD POR Reset Controller VDDCORE NRST Peripheral DMA Controller 9 Channels ROM Fast Flash Programming Interface PGMRDY PGMNVALID PGMNOE PGMCK PGMM0-PGMM3 PGMD0-PGMD7 PGMNCMD PGMEN0-PGMEN2 PIT APB WDT RTT DRXD DTXD PIO PDC DBGU PDC PIOA SAM-BA PWMC RXD0 TXD0 SCK0 RTS0 CTS0 NPCS0 NPCS1 NPCS2 NPCS3 MISO MOSI SPCK ADTRG AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 ADVREF PDC USART0 PIO PDC PDC PIO PDC SPI Timer Counter PDC PDC TC0 TC1 ADC TC2 TWI PDC SSC PWM0 PWM1 PWM2 PWM3 TF TK TD RD RK RF TCLK0 TIOA0 TIOB0 TIOA1 TIOB1 TWD TWCK 5 6175BS-ATARM-04-Nov-05 4. Signal Description Table 4-1. Signal Name Signal Description List Function Power Type Active Level Comments VDDIN VDDOUT VDDFLASH VDDIO VDDCORE VDDPLL GND Voltage and ADC Regulator Power Supply Input Voltage Regulator Output Flash Power Supply I/O Lines Power Supply Core Power Supply PLL Ground Power Power Power Power Power Power Ground 3.0 to 3.6V 1.85V nominal 3.0V to 3.6V 3.0V to 3.6V or 1.65V to 1.95V 1.65V to 1.95V 1.65V to 1.95V Clocks, Oscillators and PLLs XIN XOUT PLLRC PCK0 - PCK2 Main Oscillator Input Main Oscillator Output PLL Filter Programmable Clock Output Input Output Input Output ICE and JTAG TCK TDI TDO TMS JTAGSEL Test Clock Test Data In Test Data Out Test Mode Select JTAG Selection Flash Memory ERASE Flash and NVM Configuration Bits Erase Command Reset/Test NRST TST Microcontroller Reset Test Mode Select Debug Unit DRXD DTXD Debug Receive Data Debug Transmit Data AIC IRQ0 - IRQ1 FIQ External Interrupt Inputs Fast Interrupt Input PIO PA0 - PA31 Parallel IO Controller A I/O Pulled-up input at reset PA0 - PA20 only on AT91SAM7S32 Input Input IRQ1 not present on Input Output I/O Input Low High Open-drain with pull-Up resistor Pull-down resistor Input High Pull-down resistor Input Input Output Input Input No pull-up resistor Pull-down resistor No pull-up resistor No pull-up resistor AT91SAM7S32 6 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 AT91SAM7S Series Summary Table 4-1. Signal Name Signal Description List (Continued) Function Type USB Device Port Active Level Comments DDM DDP USB Device Port Data USB Device Port Data + USART Analog Analog not present on AT91SAM7S32 not present on AT91SAM7S32 SCK0 - SCK1 TXD0 - TXD1 RXD0 - RXD1 RTS0 - RTS1 CTS0 - CTS1 DCD1 DTR1 DSR1 RI1 Serial Clock Transmit Data Receive Data Request To Send Clear To Send Data Carrier Detect Data Terminal Ready Data Set Ready Ring Indicator I/O I/O Input Output Input Input Output Input Input Synchronous Serial Controller SCK1 not present on AT91SAM7S32 TXD1 not present on AT91SAM7S32 RXD1 not present on AT91SAM7S32 RTS1 not present on AT91SAM7S32 CTS1 not present on AT91SAM7S32 not present on AT91SAM7S32 not present on AT91SAM7S32 not present on AT91SAM7S32 not present on AT91SAM7S32 TD RD TK RK TF RF Transmit Data Receive Data Transmit Clock Receive Clock Transmit Frame Sync Receive Frame Sync Output Input I/O I/O I/O I/O Timer/Counter TCLK0 - TCLK2 TIOA0 - TIOA2 TIOB0 - TIOB2 External Clock Inputs I/O Line A I/O Line B Input I/O I/O PWM Controller TCLK1 and TCLK2 not present on AT91SAM7S32 TIOA2 not present on AT91SAM7S32 TIOB2 not present on AT91SAM7S32 PWM0 - PWM3 PWM Channels SPI Output MISO MOSI SPCK NPCS0 NPCS1-NPCS3 Master In Slave Out Master Out Slave In SPI Serial Clock SPI Peripheral Chip Select 0 SPI Peripheral Chip Select 1 to 3 I/O I/O I/O I/O Output Low Low 7 6175BS-ATARM-04-Nov-05 Table 4-1. Signal Name Signal Description List (Continued) Function Type Two-Wire Interface Active Level Comments TWD TWCK Two-wire Serial Data Two-wire Serial Clock I/O I/O Analog-to-Digital Converter AD0-AD3 AD4-AD7 ADTRG ADVREF Analog Inputs Analog Inputs ADC Trigger ADC Reference Analog Analog Input Analog Fast Flash Programming Interface Digital pulled-up inputs at reset Analog Inputs PGMEN0-PGMEN2 PGMM0-PGMM3 PGMD0-PGMD15 PGMRDY PGMNVALID PGMNOE PGMCK PGMNCMD Programming Enabling Programming Mode Programming Data Programming Ready Data Direction Programming Read Programming Clock Programming Command Input Input I/O Output Output Input Input Input Low High Low Low PGMD0-PGMD7 only on AT91SAM7S32 8 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 AT91SAM7S Series Summary 5. Package and Pinout The AT91SAM7S256/128/64/321 are available in a 64-lead LQFP package. The AT91SAM7S32 is available in a 48-lead LQFP package. 5.1 64-lead LQFP Mechanical Overview Figure 5-1 shows the orientation of the 64-lead LQFP package. A detailed mechanical description is given in the section Mechanical Characteristics of the full datasheet. Figure 5-1. 64-lead LQFP Package Pinout (Top View) 48 49 33 32 64 1 16 17 5.2 64-lead LQFP Pinout AT91SAM7S256/128/64/321 Pinout in 64-lead LQFP Package ADVREF GND AD4 AD5 AD6 AD7 VDDIN VDDOUT PA17/PGMD5/AD0 PA18/PGMD6/AD1 PA21/PGMD9 VDDCORE PA19/PGMD7/AD2 PA22/PGMD10 PA23/PGMD11 PA20/PGMD8/AD3 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 GND VDDIO PA16/PGMD4 PA15/PGMD3 PA14/PGMD2 PA13/PGMD1 PA24/PGMD12 VDDCORE PA25/PGMD13 PA26/PGMD14 PA12/PGMD0 PA11/PGMM3 PA10/PGMM2 PA9/PGMM1 PA8/PGMM0 PA7/PGMNVALID 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 TDI PA6/PGMNOE PA5/PGMRDY PA4/PGMNCMD PA27/PGMD15 PA28 NRST TST PA29 PA30 PA3 PA2/PGMEN2 VDDIO GND PA1/PGMEN1 PA0/PGMEN0 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 TDO JTAGSEL TMS PA31 TCK VDDCORE ERASE DDM DDP VDDIO VDDFLASH GND XOUT XIN/PGMCK PLLRC VDDPLL Table 5-1. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 9 6175BS-ATARM-04-Nov-05 5.3 48-lead LQFP Mechanical Overview Figure 5-1 shows the orientation of the 48-lead LQFP package. A detailed mechanical description is given in the section Mechanical Characteristics of the product datasheet. Figure 5-2. 48-lead LQFP Package Pinout (Top View) 36 37 25 24 48 1 12 13 5.4 48-lead LQFP Pinout AT91SAM7S32 Pinout in 48-lead LQFP Package ADVREF GND AD4 AD5 AD6 AD7 VDDIN VDDOUT PA17/PGMD5/AD0 PA18/PGMD6/AD1 PA19/PGMD7/AD2 PA20/AD3 13 14 15 16 17 18 19 20 21 22 23 24 VDDIO PA16/PGMD4 PA15/PGMD3 PA14/PGMD2 PA13/PGMD1 VDDCORE PA12/PGMD0 PA11/PGMM3 PA10/PGMM2 PA9/PGMM1 PA8/PGMM0 PA7/PGMNVALID 25 26 27 28 29 30 31 32 33 34 35 36 TDI PA6/PGMNOE PA5/PGMRDY PA4/PGMNCMD NRST TST PA3 PA2/PGMEN2 VDDIO GND PA1/PGMEN1 PA0/PGMEN0 37 38 39 40 41 42 43 44 45 46 47 48 TDO JTAGSEL TMS TCK VDDCORE ERASE VDDFLASH GND XOUT XIN/PGMCK PLLRC VDDPLL Table 5-2. 1 2 3 4 5 6 7 8 9 10 11 12 10 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 AT91SAM7S Series Summary 6. Power Considerations 6.1 Power Supplies The AT91SAM7S Series has six types of power supply pins and integrates a voltage regulator, allowing the device to be supplied with only one voltage. The six power supply pin types are: * VDDIN pin. It powers the voltage regulator and the ADC; voltage ranges from 3.0V to 3.6V, 3.3V nominal. * VDDOUT pin. It is the output of the 1.8V voltage regulator. * VDDIO pin. It powers the I/O lines and the USB transceivers; dual voltage range is supported. Ranges from 3.0V to 3.6V, 3.3V nominal or from 1.65V to 1.95V, 1.8V nominal. Note that supplying less than 3.0V to VDDIO prevents any use of the USB transceivers. * VDDFLASH pin. It powers a part of the Flash and is required for the Flash to operate correctly; voltage ranges from 3.0V to 3.6V, 3.3V nominal. * VDDCORE pins. They power the logic of the device; voltage ranges from 1.65V to 1.95V, 1.8V typical. It can be connected to the VDDOUT pin with decoupling capacitor. VDDCORE is required for the device, including its embedded Flash, to operate correctly. During startup, core supply voltage (VDDCORE) slope must be superior or equal to 6V/ms. * VDDPLL pin. It powers the oscillator and the PLL. It can be connected directly to the VDDOUT pin. No separate ground pins are provided for the different power supplies. Only GND pins are provided and should be connected as shortly as possible to the system ground plane. In order to decrease current consumption, if the voltage regulator and the ADC are not used, VDDIN, ADVREF, AD4, AD5, AD6 and AD7 should be connected to GND. In this case VDDOUT should be left unconnected. 6.2 Power Consumption The AT91SAM7S Series has a static current of less than 60 A on VDDCORE at 25C, including the RC oscillator, the voltage regulator and the power-on reset. When the brown-out detector is activated, 20 A static current is added. The dynamic power consumption on VDDCORE is less than 50 mA at full speed when running out of the Flash. Under the same conditions, the power consumption on VDDFLASH does not exceed 10 mA. 6.3 Voltage Regulator The AT91SAM7S Series embeds a voltage regulator that is managed by the System Controller. In Normal Mode, the voltage regulator consumes less than 100 A static current and draws 100 mA of output current. The voltage regulator also has a Low-power Mode. In this mode, it consumes less than 25 A static current and draws 1 mA of output current. Adequate output supply decoupling is mandatory for VDDOUT to reduce ripple and avoid oscillations. The best way to achieve this is to use two capacitors in parallel: one external 470 pF (or 1 nF) NPO capacitor must be connected between VDDOUT and GND as close to the chip as 11 6175BS-ATARM-04-Nov-05 possible. One external 2.2 F (or 3.3 F) X7R capacitor must be connected between VDDOUT and GND. Adequate input supply decoupling is mandatory for VDDIN in order to improve startup stability and reduce source voltage drop. The input decoupling capacitor should be placed close to the chip. For example, two capacitors can be used in parallel: 100 nF NPO and 4.7 F X7R. 6.4 Typical Powering Schematics The AT91SAM7S Series supports a 3.3V single supply mode. The internal regulator is connected to the 3.3V source and its output feeds VDDCORE and the VDDPLL. Figure 6-1 shows the power schematics to be used for USB bus-powered systems. Figure 6-1. 3.3V System Single Power Supply Schematic VDDFLASH Power Source ranges from 4.5V (USB) to 18V DC/DC Converter VDDIO VDDIN 3.3V VDDOUT Voltage Regulator VDDCORE VDDPLL 12 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 AT91SAM7S Series Summary 7. I/O Lines Considerations 7.1 JTAG Port Pins TMS, TDI and TCK are schmitt trigger inputs. TMS and TCK are 5-V tolerant, TDI is not. TMS, TDI and TCK do not integrate a pull-up resistor. TDO is an output, driven at up to VDDIO, and has no pull-up resistor. The JTAGSEL pin is used to select the JTAG boundary scan when asserted at a high level. The JTAGSEL pin integrates a permanent pull-down resistor of about 15 k to GND, so that it can be left unconnected for normal operations. 7.2 Test Pin The TST pin is used for manufacturing test, fast programming mode or SAM-BA Boot Recovery of the AT91SAM7S Series when asserted high. The TST pin integrates a permanent pull-down resistor of about 15 k to GND, so that it can be left unconnected for normal operations. To enter fast programming mode, the TST pin and the PA0 and PA1 pins should be tied high and PA2 tied to low. To enter SAM-BA Boot Recovery, the TST pin and the PA0, PA1 and PA2 pins should be tied high. Driving the TST pin at a high level while PA0 or PA1 is driven at 0 leads to unpredictable results. 7.3 Reset Pin The NRST pin is bidirectional with an open drain output buffer. It is handled by the on-chip reset controller and can be driven low to provide a reset signal to the external components or asserted low externally to reset the microcontroller. There is no constraint on the length of the reset pulse, and the reset controller can guarantee a minimum pulse length. This allows connection of a simple push-button on the pin NRST as system user reset, and the use of the signal NRST to reset all the components of the system. The NRST pin integrates a permanent pull-up resistor to VDDIO. 7.4 ERASE Pin The ERASE pin is used to re-initialize the Flash content and some of its NVM bits. It integrates a permanent pull-down resistor of about 15 k to GND, so that it can be left unconnected for normal operations. 7.5 PIO Controller A Lines All the I/O lines PA0 to PA31 (PA0 to PA20 on AT91SAM7S32) are 5V-tolerant and all integrate a programmable pull-up resistor. Programming of this pull-up resistor is performed independently for each I/O line through the PIO controllers. 5V-tolerant means that the I/O lines can drive voltage level according to VDDIO, but can be driven with a voltage of up to 5.5V. However, driving an I/O line with a voltage over VDDIO while the programmable pull-up resistor is enabled will create a current path through the pull-up resistor from the I/O line to VDDIO. Care should be taken, in particular at reset, as all the I/O lines default to input with pull-up resistor enabled at reset. 13 6175BS-ATARM-04-Nov-05 7.6 I/O Line Drive Levels The PIO lines PA0 to PA3 are high-drive current capable. Each of these I/O lines can drive up to 16 mA permanently. The remaining I/O lines can draw only 8 mA. However, the total current drawn by all the I/O lines cannot exceed 150 mA (100mA for AT91SAM7S32). 14 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 AT91SAM7S Series Summary 8. Processor and Architecture 8.1 ARM7TDMI Processor * RISC processor based on ARMv4T Von Neumann architecture - Runs at up to 55 MHz, providing 0.9 MIPS/MHz * Two instruction sets - ARM(R) high-performance 32-bit instruction set - Thumb(R) high code density 16-bit instruction set * Three-stage pipeline architecture - Instruction Fetch (F) - Instruction Decode (D) - Execute (E) 8.2 Debug and Test Features * Integrated Embedded ICE (embedded in-circuit emulator) - Two watchpoint units - Test access port accessible through a JTAG protocol - Debug communication channel * Debug Unit - Two-pin UART - Debug communication channel interrupt handling - Chip ID Register * IEEE1149.1 JTAG Boundary-scan on all digital pins 8.3 Memory Controller * Bus Arbiter - Handles requests from the ARM7TDMI and the Peripheral DMA Controller * Address decoder provides selection signals for - Three internal 1 Mbyte memory areas - One 256 Mbyte embedded peripheral area * Abort Status Registers - Source, Type and all parameters of the access leading to an abort are saved - Facilitates debug by detection of bad pointers * Misalignment Detector - Alignment checking of all data accesses - Abort generation in case of misalignment * Remap Command - Remaps the SRAM in place of the embedded non-volatile memory - Allows handling of dynamic exception vectors * Embedded Flash Controller - Embedded Flash interface, up to three programmable wait states 15 6175BS-ATARM-04-Nov-05 - Prefetch buffer, buffering and anticipating the 16-bit requests, reducing the required wait states - Key-protected program, erase and lock/unlock sequencer - Single command for erasing, programming and locking operations - Interrupt generation in case of forbidden operation 8.4 Peripheral DMA Controller * Handles data transfer between peripherals and memories * Eleven channels: AT91SAM7S256/128/64/321 * Nine channels: AT91SAM7S32 - Two for each USART - Two for the Debug Unit - Two for the Serial Synchronous Controller - Two for the Serial Peripheral Interface - One for the Analog-to-digital Converter * Low bus arbitration overhead - One Master Clock cycle needed for a transfer from memory to peripheral - Two Master Clock cycles needed for a transfer from peripheral to memory * Next Pointer management for reducing interrupt latency requirements 16 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 AT91SAM7S Series Summary 9. Memory 9.1 AT91SAM7S256 * 256 Kbytes of Flash Memory single plane - - - - - - - - * - 1024 pages of 256 bytes Fast access time, 30 MHz single-cycle access in Worst Case conditions Page programming time: 6 ms, including page auto-erase Page programming without auto-erase: 3 ms Full chip erase time: 15 ms 10,000 write cycles, 10-year data retention capability 16 lock bits, protecting 16 sectors of 64 pages Protection Mode to secure contents of the Flash Single-cycle access at full speed 64 Kbytes of Fast SRAM 9.2 AT91SAM7S128 * 128 Kbytes of Flash Memory single plane - - - - - - - - * - 512 pages of 256 bytes Fast access time, 30 MHz single-cycle access in Worst Case conditions Page programming time: 6 ms, including page auto-erase Page programming without auto-erase: 3 ms Full chip erase time: 15 ms 10,000 write cycles, 10-year data retention capability 8 lock bits, protecting 8 sectors of 64 pages Protection Mode to secure contents of the Flash Single-cycle access at full speed 32 Kbytes of Fast SRAM 9.3 AT91SAM7S64 * 64 Kbytes of Flash Memory single plane - - - - - - - - * - 512 pages of 128 bytes Fast access time, 30 MHz single-cycle access in Worst Case conditions Page programming time: 6 ms, including page auto-erase Page programming without auto-erase: 3 ms Full chip erase time: 15 ms 10,000 write cycles, 10-year data retention capability 16 lock bits, protecting 16 sectors of 32 pages Protection Mode to secure contents of the Flash Single-cycle access at full speed 16 Kbytes of Fast SRAM 17 6175BS-ATARM-04-Nov-05 9.4 AT91SAM7S321/32 * 32 Kbytes of Flash Memory single plane - - - - - - - - * - 256 pages of 128 bytes Fast access time, 30 MHz single-cycle access in Worst Case conditions Page programming time: 6 ms, including page auto-erase Page programming without auto-erase: 3 ms Full chip erase time: 15 ms 10,000 write cycles, 10-year data retention capability 8 lock bits, protecting 8 sectors of 32 pages Protection Mode to secure contents of the Flash Single-cycle access at full speed 8 Kbytes of Fast SRAM 9.5 9.5.1 Memory Mapping Internal SRAM The AT91SAM7S256/128/64/321/32 embeds a high-speed 64/32/16/8/8-Kbyte SRAM bank. After reset and until the Remap Command is performed, the SRAM is only accessible at address 0x0020 0000. After Remap, the SRAM also becomes available at address 0x0. 9.5.2 Internal ROM The AT91SAM7S Series embeds an Internal ROM. The ROM contains the FFPI and the SAM-BA program. The internal ROM is not mapped by default. 9.5.3 Internal Flash The AT91SAM7S256/128/64/321/32 features one bank of 256/128/64/32/32 Kbytes of Flash. At any time, the Flash is mapped to address 0x0010 0000. It is also accessible at address 0x0 after the reset and before the Remap Command. Figure 9-1. Internal Memory Mapping 0x0000 0000 0x000F FFFF Flash Before Remap SRAM After Remap Internal Flash 1 M Bytes 0x0010 0000 1 M Bytes 0x001F FFFF 0x0020 0000 256M Bytes 0x002F FFFF 0x0030 0000 Internal SRAM 1 M Bytes Undefined Areas (Abort) 253 M Bytes 0x0FFF FFFF 18 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 AT91SAM7S Series Summary 9.6 9.6.1 Embedded Flash Flash Overview * The Flash of the AT91SAM7S256 is organized in 1024 pages of 256 bytes. The 262,144 bytes are organized in 32-bit words. * The Flash of the AT91SAM7S128 is organized in 512 pages of 256 bytes. The 131,072 bytes are organized in 32-bit words. * The Flash of the AT91SAM7S64 is organized in 512 pages of 128 bytes. The 65,536 bytes are organized in 32-bit words. * The Flash of the AT91SAM7S321/32 is organized in 256 pages of 128 bytes. The 32,768 bytes are organized in 32-bit words. * The Flash of the AT91SAM7S256/128 contains a 256-byte write buffer, accessible through a 32-bit interface. * The Flash of the AT91SAM7S64/321/32 contains a 128-byte write buffer, accessible through a 32-bit interface. The Flash benefits from the integration of a power reset cell and from the brownout detector. This prevents code corruption during power supply changes, even in the worst conditions. When Flash is not used (read or write access), it is automatically placed into standby mode. 9.6.2 Embedded Flash Controller The Embedded Flash Controller (EFC) manages accesses performed by the masters of the system. It enables reading the Flash and writing the write buffer. It also contains a User Interface, mapped within the Memory Controller on the APB. The User Interface allows: * programming of the access parameters of the Flash (number of wait states, timings, etc.) * starting commands such as full erase, page erase, page program, NVM bit set, NVM bit clear, etc. * getting the end status of the last command * getting error status * programming interrupts on the end of the last commands or on errors The Embedded Flash Controller also provides a dual 32-bit Prefetch Buffer that optimizes 16-bit access to the Flash. This is particularly efficient when the processor is running in Thumb mode. 9.6.3 Lock Regions The Embedded Flash Controller manages 16/8 lock bits to protect 16/8 regions of the flash against inadvertent flash erasing or programming commands. Table 9-1 summarizes the configuration of the five devices. Table 9-1. Device Flash Configuration Summary Number of Lock Bits 16 8 16 8 Number of Pages in the Lock Region 64 64 32 32 Page Size 256 bytes 256 bytes 128 bytes 128 bytes AT91SAM7S256 AT91SAM7S128 AT91SAM7S64 AT91SAM7S321/32 19 6175BS-ATARM-04-Nov-05 If a locked-regions erase or program command occurs, the command is aborted and the EFC trigs an interrupt. The 16 NVM bits are software programmable through the EFC User Interface. The command "Set Lock Bit" enables the protection. The command "Clear Lock Bit" unlocks the lock region. Asserting the ERASE pin clears the lock bits, thus unlocking the entire Flash. 9.6.4 Security Bit Feature The AT91SAM7S Series features a security bit, based on a specific NVM-Bit. When the security is enabled, any access to the Flash, either through the ICE interface or through the Fast Flash Programming Interface, is forbidden. This ensures the confidentiality of the code programmed in the Flash. This security bit can only be enabled, through the Command "Set Security Bit" of the EFC User Interface. Disabling the security bit can only be achieved by asserting the ERASE pin at 1, and after a full flash erase is performed. When the security bit is deactivated, all accesses to the flash are permitted. It is important to note that the assertion of the ERASE pin should always be longer than 50 ms. As the ERASE pin integrates a permanent pull-down, it can be left unconnected during normal operation. However, it is safer to connect it directly to GND for the final application. 9.6.5 Non-volatile Brownout Detector Control Two general purpose NVM (GPNVM) bits are used for controlling the brownout detector (BOD), so that even after a power loss, the brownout detector operations remain in their state. These two GPNVM bits can be cleared or set respectively through the commands "Clear General-purpose NVM Bit" and "Set General-purpose NVM Bit" of the EFC User Interface. * GPNVM Bit 0 is used as a brownout detector enable bit. Setting the GPNVM Bit 0 enables the BOD, clearing it disables the BOD. Asserting ERASE clears the GPNVM Bit 0 and thus disables the brownout detector by default. * The GPNVM Bit 1 is used as a brownout reset enable signal for the reset controller. Setting the GPNVM Bit 1 enables the brownout reset when a brownout is detected, Clearing the GPNVM Bit 1 disables the brownout reset. Asserting ERASE disables the brownout reset by default. 9.6.6 Calibration Bits Eight NVM bits are used to calibrate the brownout detector and the voltage regulator. These bits are factory configured and cannot be changed by the user. The ERASE pin has no effect on the calibration bits. 9.7 Fast Flash Programming Interface The Fast Flash Programming Interface allows programming the device through either a serial JTAG interface or through a multiplexed fully-handshaked parallel port. It allows gang-programming with market-standard industrial programmers. The FFPI supports read, page program, page erase, full erase, lock, unlock and protect commands. The Fast Flash Programming Interface is enabled and the Fast Programming Mode is entered when the TST pin and the PA0 and PA1 pins are all tied high and PA2 is tied low. 20 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 AT91SAM7S Series Summary 9.8 SAM-BA Boot Assistant The SAM-BATM Boot Recovery restores the SAM-BA Boot in the first two sectors of the on-chip Flash memory. The SAM-BA Boot recovery is performed when the TST pin and the PA0, PA1 and PA2 pins are all tied high. The SAM-BA Boot Assistant is a default Boot Program that provides an easy way to program in situ the on-chip Flash memory. The SAM-BA Boot Assistant supports serial communication through the DBGU or through the USB Device Port. (The AT91SAM7S32 has no USB Device Port.) * Communication through the DBGU supports a wide range of crystals from 3 to 20 MHz via software auto-detection. * Communication through the USB Device Port is limited to an 18.432 MHz crystal. ( The SAM-BA Boot provides an interface with SAM-BA Graphic User Interface (GUI). 21 6175BS-ATARM-04-Nov-05 10. System Controller The System Controller manages all vital blocks of the microcontroller: interrupts, clocks, power, time, debug and reset. Figure 10-1. System Controller Block Diagram (AT91SAM7S256/128/64/321) System Controller jtag_nreset Boundary Scan TAP Controller irq0-irq1 fiq periph_irq[2..14] nirq Advanced Interrupt Controller int nfiq proc_nreset PCK debug ARM7TDMI pit_irq rtt_irq wdt_irq dbgu_irq pmc_irq rstc_irq ice_nreset force_ntrst MCK periph_nreset dbgu_rxd MCK debug periph_nreset SLCK periph_nreset SLCK debug idle proc_nreset cal gpnvm[0] en gpnvm[1] flash_wrdis ice_nreset jtag_nreset Debug Unit dbgu_irq force_ntrst dbgu_txd security_bit Periodic Interval Timer Real-Time Timer Watchdog Timer wdt_fault WDRPROC bod_rst_en pit_irq flash_poe rtt_irq flash_wrdis cal wdt_irq gpnvm[0..1] Embedded Flash MCK proc_nreset BOD Reset Controller periph_nreset proc_nreset Memory Controller POR flash_poe rstc_irq SLCK NRST Voltage Regulator Mode Controller standby Voltage Regulator cal RCOSC XIN SLCK periph_clk[2..14] pck[0-2] UDPCK periph_clk[11] periph_nreset periph_irq[11] usb_suspend OSC XOUT MAINCK Power Management Controller PCK UDPCK MCK USB Device Port PLLRC PLL PLLCK pmc_irq int idle periph_clk[4..14] periph_nreset periph_nreset usb_suspend periph_nreset periph_clk[2] dbgu_rxd periph_irq{2] irq0-irq1 Embedded Peripherals periph_irq[4..14] PIO Controller fiq dbgu_txd in PA0-PA31 out enable 22 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 AT91SAM7S Series Summary Figure 10-2. System Controller Block Diagram (AT91SAM7S32) System Controller jtag_nreset Boundary Scan TAP Controller irq0 fiq periph_irq[2..14] nirq Advanced Interrupt Controller int nfiq proc_nreset PCK debug ARM7TDMI pit_irq rtt_irq wdt_irq dbgu_irq pmc_irq rstc_irq ice_nreset force_ntrst dbgu_irq MCK periph_nreset dbgu_rxd MCK debug periph_nreset SLCK periph_nreset SLCK debug idle proc_nreset cal gpnvm[0] en gpnvm[1] flash_wrdis ice_nreset jtag_nreset Debug Unit Periodic Interval Timer Real-Time Timer Watchdog Timer wdt_fault WDRPROC bod_rst_en force_ntrst dbgu_txd security_bit pit_irq flash_poe rtt_irq flash_wrdis cal wdt_irq gpnvm[0..1] Embedded Flash MCK proc_nreset BOD Reset Controller periph_nreset proc_nreset Memory Controller POR flash_poe rstc_irq SLCK NRST Voltage Regulator Mode Controller standby Voltage Regulator cal RCOSC XIN SLCK periph_clk[2..14] pck[0-2] OSC XOUT MAINCK Power Management Controller PCK MCK PLLRC PLL PLLCK pmc_irq int idle periph_clk[4..14] periph_nreset periph_nreset periph_nreset periph_clk[2] dbgu_rxd periph_irq{2] irq0 Embedded Peripherals periph_irq[4..14] PIO Controller fiq dbgu_txd in PA0-PA20 out enable 23 6175BS-ATARM-04-Nov-05 10.1 System Controller Mapping The System Controller peripherals are all mapped to the highest 4 Kbytes of address space, between addresses 0xFFFF F000 and 0xFFFF FFFF. Figure 10-3 shows the mapping of the System Controller. Note that the Memory Controller configuration user interface is also mapped within this address space. Figure 10-3. System Controller Mapping Address 0xFFFF F000 Peripheral Peripheral Name Size AIC 0xFFFF F1FF 0xFFFF F200 Advanced Interrupt Controller 512 Bytes/128 registers DBGU 0xFFFF F3FF 0xFFFF F400 Debug Unit 512 Bytes/128 registers PIOA 0xFFFF F5FF 0xFFFF F600 PIO Controller A 512 Bytes/128 registers Reserved 0xFFFF FBFF 0xFFFF FC00 PMC 0xFFFF FCFF 0xFFFF FD00 0xFFFF FD0F 0xFFFF FD20 0xFFFF FC2F 0xFFFF FD30 0xFFFF FC3F 0xFFFF FD40 0xFFFF FD4F 0xFFFF FD60 0xFFFF FC6F 0xFFFF FD70 0xFFFF FEFF 0xFFFF FF00 Power Management Controller Reset Controller Real-time Timer Periodic Interval Timer Watchdog Timer Voltage Regulator Mode Controller 256 Bytes/64 registers 16 Bytes/4 registers 16 Bytes/4 registers 16 Bytes/4 registers 16 Bytes/4 registers 4 Bytes/1 register RSTC Reserved RTT PIT WDT Reserved VREG Reserved MC 0xFFFF FFFF Memory Controller 256 Bytes/64 registers 24 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 AT91SAM7S Series Summary 10.2 Reset Controller The Reset Controller is based on a power-on reset cell and one brownout detector. It gives the status of the last reset, indicating whether it is a power-up reset, a software reset, a user reset, a watchdog reset or a brownout reset. In addition, it controls the internal resets and the NRST pin open-drain output. It allows to shape a signal on the NRST line, guaranteeing that the length of the pulse meets any requirement. Note that if NRST is used as a reset output signal for external devices during power-off, the brownout detector must be activated. 10.2.1 Brownout Detector and Power-on Reset The AT91SAM7S Series embeds a brownout detection circuit and a power-on reset cell. Both are supplied with and monitor VDDCORE. Both signals are provided to the Flash to prevent any code corruption during power-up or power-down sequences or if brownouts occur on the VDDCORE power supply. The power-on reset cell has a limited-accuracy threshold at around 1.5V. Its output remains low during power-up until VDDCORE goes over this voltage level. This signal goes to the reset controller and allows a full re-initialization of the device. The brownout detector monitors the VDDCORE level during operation by comparing it to a fixed trigger level. It secures system operations in the most difficult environments and prevents code corruption in case of brownout on the VDDCORE. Only VDDCORE is monitored, as a voltage drop on VDDFLASH or any other power supply of the device cannot affect the Flash. When the brownout detector is enabled and VDDCORE decreases to a value below the trigger level (Vbot-, defined as Vbot - hyst/2), the brownout output is immediately activated. When VDDCORE increases above the trigger level (Vbot+, defined as Vbot + hyst/2), the reset is released. The brownout detector only detects a drop if the voltage on VDDCORE stays below the threshold voltage for longer than about 1s. The threshold voltage has a hysteresis of about 50 mV, to ensure spike free brownout detection. The typical value of the brownout detector threshold is 1.68V with an accuracy of 2% and is factory calibrated. The brownout detector is low-power, as it consumes less than 20 A static current. However, it can be deactivated to save its static current. In this case, it consumes less than 1A. The deactivation is configured through the GPNVM bit 0 of the Flash. 25 6175BS-ATARM-04-Nov-05 10.3 Clock Generator The Clock Generator embeds one low-power RC Oscillator, one Main Oscillator and one PLL with the following characteristics: * RC Oscillator ranges between 22 kHz and 42 kHz * Main Oscillator frequency ranges between 3 and 20 MHz * Main Oscillator can be bypassed * PLL output ranges between 80 and 220 MHz It provides SLCK, MAINCK and PLLCK. Figure 10-4. Clock Generator Block Diagram Clock Generator Embedded RC Oscillator Slow Clock SLCK XIN XOUT Main Oscillator Main Clock MAINCK PLLRC PLL and Divider PLL Clock PLLCK Status Control Power Management Controller 26 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 AT91SAM7S Series Summary 10.4 Power Management Controller The Power Management Controller uses the Clock Generator outputs to provide: * the Processor Clock PCK * the Master Clock MCK * the USB Clock UDPCK (not present on AT91SAM7S32) * all the peripheral clocks, independently controllable * three programmable clock outputs The Master Clock (MCK) is programmable from a few hundred Hz to the maximum operating frequency of the device. The Processor Clock (PCK) switches off when entering processor idle mode, thus allowing reduced power consumption while waiting for an interrupt. Figure 10-5. Power Management Controller Block Diagram Processor Clock Controller Master Clock Controller SLCK MAINCK PLLCK Prescaler /1,/2,/4,...,/64 Peripherals Clock Controller ON/OFF Idle Mode MCK PCK int periph_clk[2..14] Programmable Clock Controller SLCK MAINCK PLLCK Prescaler /1,/2,/4,...,/64 pck[0..2] USB Clock Controller ON/OFF PLLCK Divider /1,/2,/4 usb_suspend UDPCK 10.5 Advanced Interrupt Controller * Controls the interrupt lines (nIRQ and nFIQ) of an ARM Processor * Individually maskable and vectored interrupt sources - Source 0 is reserved for the Fast Interrupt Input (FIQ) - Source 1 is reserved for system peripherals RTT, PIT, EFC, PMC, DBGU, etc.) - Other sources control the peripheral interrupts or external interrupts - Programmable edge-triggered or level-sensitive internal sources - Programmable positive/negative edge-triggered or high/low level-sensitive external sources * 8-level Priority Controller - Drives the normal interrupt of the processor - Handles priority of the interrupt sources 27 6175BS-ATARM-04-Nov-05 - Higher priority interrupts can be served during service of lower priority interrupt * Vectoring - Optimizes interrupt service routine branch and execution - One 32-bit vector register per interrupt source - Interrupt vector register reads the corresponding current interrupt vector * Protect Mode - Easy debugging by preventing automatic operations * Fast Forcing - Permits redirecting any interrupt source on the fast interrupt * General Interrupt Mask - Provides processor synchronization on events without triggering an interrupt 10.6 Debug Unit * Comprises: - One two-pin UART - One Interface for the Debug Communication Channel (DCC) support - One set of Chip ID Registers - One Interface providing ICE Access Prevention * Two-pin UART - Implemented features are compatible with the USART - Programmable Baud Rate Generator - Parity, Framing and Overrun Error - Automatic Echo, Local Loopback and Remote Loopback Channel Modes * Debug Communication Channel Support - Offers visibility of COMMRX and COMMTX signals from the ARM Processor * Chip ID Registers - Identification of the device revision, sizes of the embedded memories, set of peripherals - Chip ID is 0x270B0940 for AT91SAM7S256 (VERSION 0) - Chip ID is 0x270A0740 for AT91SAM7S128 (VERSION 0) - Chip ID is 0x27090540 for AT91SAM7S64 (VERSION 0) - Chip ID is 0x27080342 for AT91SAM7S321 (VERSION 0) - Chip ID is 0x27080340 for AT91SAM7S32 (VERSION 0) 10.7 Periodic Interval Timer * 20-bit programmable counter plus 12-bit interval counter 10.8 Watchdog Timer * 12-bit key-protected Programmable Counter running on prescaled SCLK * Provides reset or interrupt signals to the system * Counter may be stopped while the processor is in debug state or in idle mode 28 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 AT91SAM7S Series Summary 10.9 Real-time Timer * 32-bit free-running counter with alarm running on prescaled SCLK * Programmable 16-bit prescaler for SLCK accuracy compensation 10.10 PIO Controller * One PIO Controller, controlling 32 I/O lines (21 for AT91SAM7S32) * Fully programmable through set/clear registers * Multiplexing of two peripheral functions per I/O line * For each I/O line (whether assigned to a peripheral or used as general-purpose I/O) - Input change interrupt - Half a clock period glitch filter - Multi-drive option enables driving in open drain - Programmable pull-up on each I/O line - Pin data status register, supplies visibility of the level on the pin at any time * Synchronous output, provides Set and Clear of several I/O lines in a single write 10.11 Voltage Regulator Controller The aim of this controller is to select the Power Mode of the Voltage Regulator between Normal Mode (bit 0 is cleared) or Standby Mode (bit 0 is set). 29 6175BS-ATARM-04-Nov-05 11. Peripherals 11.1 Peripheral Mapping Each peripheral is allocated 16 Kbytes of address space. Figure 11-1. User Peripheral Mapping (AT91SAM7S256/128/64/321) Peripheral Name 0xF000 0000 Size Reserved 0xFFF9 FFFF 0xFFFA 0000 0xFFFA 3FFF 0xFFFA 4000 TC0, TC1, TC2 Timer/Counter 0, 1 and 2 16 Kbytes Reserved 0xFFFA FFFF 0xFFFB 0000 0xFFFB 3FFF 0xFFFB 4000 UDP USB Device Port 16 Kbytes Reserved 0xFFFB 7FFF 0xFFFB 8000 0xFFFB BFFF 0xFFFB C000 TWI Two-Wire Interface 16 Kbytes Reserved 0xFFFC 0000 0xFFFB FFFF USART0 0xFFFC 3FFF Universal Synchronous Asynchronous Receiver Transmitter 0 Universal Synchronous Asynchronous Receiver Transmitter 1 16 Kbytes 0xFFFC 4000 0xFFFC 7FFF 0xFFFC 8000 USART1 16 Kbytes Reserved 0xFFFC BFFF 0xFFFC C000 PWMC 0xFFFC FFFF 0xFFFD 0000 PWM Controller 16 Kbytes Reserved 0xFFFD 3FFF 0xFFFD 4000 0xFFFD 7FFF SSC Serial Synchronous Controller 16 Kbytes 0xFFFD 8000 0xFFFD BFFF 0xFFFD C000 ADC Analog-to-Digital Converter 16 Kbytes Reserved 0xFFFD FFFF 0xFFFE 0000 0xFFFE 3FFF 0xFFFE 4000 SPI Serial Peripheral Interface 16 Kbytes Reserved 0xFFFE FFFF 30 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 AT91SAM7S Series Summary Figure 11-2. User Peripheral Mapping (AT91SAM7S32) Peripheral Name 0xF000 0000 Size Reserved 0xFFF9 FFFF 0xFFFA 0000 0xFFFA 3FFF 0xFFFA 4000 TC0, TC1, TC2 Timer/Counter 0, 1 and 2 16 Kbytes Reserved 0xFFFA FFFF 0xFFFB 0000 Reserved 0xFFFB 3FFF 0xFFFB 4000 Reserved 0xFFFB 7FFF 0xFFFB 8000 0xFFFB BFFF 0xFFFB C000 TWI Two-Wire Interface 16 Kbytes Reserved 0xFFFC 0000 0xFFFB FFFF USART 0xFFFC 3FFF Universal Synchronous Asynchronous Receiver Transmitter 16 Kbytes 0xFFFC 4000 Reserved 0xFFFC 7FFF 0xFFFC 8000 Reserved 0xFFFC BFFF 0xFFFC C000 PWMC 0xFFFC FFFF 0xFFFD 0000 PWM Controller 16 Kbytes Reserved 0xFFFD 3FFF 0xFFFD 4000 0xFFFD 7FFF SSC Serial Synchronous Controller 16 Kbytes 0xFFFD 8000 0xFFFD BFFF 0xFFFD C000 ADC Analog-to-Digital Converter 16 Kbytes Reserved 0xFFFD FFFF 0xFFFE 0000 0xFFFE 3FFF 0xFFFE 4000 SPI Serial Peripheral Interface 16 Kbytes Reserved 0xFFFE FFFF 31 6175BS-ATARM-04-Nov-05 11.2 Peripheral Multiplexing on PIO Lines The AT91SAM7S Series features one PIO controller, PIOA, that multiplexes the I/O lines of the peripheral set. PIO Controller A controls 32 lines (21 lines for AT91SAM7S32). Each line can be assigned to one of two peripheral functions, A or B. Some of them can also be multiplexed with the analog inputs of the ADC Controller. Table 11-1 on page 33 defines how the I/O lines of the peripherals A, B or the analog inputs are multiplexed on the PIO Controller A. The two columns "Function" and "Comments" have been inserted for the user's own comments; they may be used to track how pins are defined in an application. Note that some peripheral functions that are output only may be duplicated in the table. All pins reset in their Parallel I/O lines function are configured in input with the programmable pull-up enabled, so that the device is maintained in a static state as soon as a reset is detected. 32 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 AT91SAM7S Series Summary 11.3 PIO Controller A Multiplexing Multiplexing on PIO Controller A (AT91SAM7S256/128/64/321) PIO Controller A I/O Line PA0 PA1 PA2 PA3 PA4 PA5 PA6 PA7 PA8 PA9 PA10 PA11 PA12 PA13 PA14 PA15 PA16 PA17 PA18 PA19 PA20 PA21 PA22 PA23 PA24 PA25 PA26 PA27 PA28 PA29 PA30 PA31 Peripheral A PWM0 PWM1 PWM2 TWD TWCK RXD0 TXD0 RTS0 CTS0 DRXD DTXD NPCS0 MISO MOSI SPCK TF TK TD RD RK RF RXD1 TXD1 SCK1 RTS1 CTS1 DCD1 DTR1 DSR1 RI1 IRQ1 NPCS1 Peripheral B TIOA0 TIOB0 SCK0 NPCS3 TCLK0 NPCS3 PCK0 PWM3 ADTRG NPCS1 NPCS2 PWM0 PWM1 PWM2 PWM3 TIOA1 TIOB1 PCK1 PCK2 FIQ IRQ0 PCK1 NPCS3 PWM0 PWM1 PWM2 TIOA2 TIOB2 TCLK1 TCLK2 NPCS2 PCK2 AD0 AD1 AD2 AD3 Comments High-Drive High-Drive High-Drive High-Drive Application Usage Function Comments Table 11-1. 33 6175BS-ATARM-04-Nov-05 Table 11-2. Multiplexing on PIO Controller A (SAM7S32) PIO Controller A Application Usage Comments High-Drive High-Drive High-Drive High-Drive Function Comments I/O Line PA0 PA1 PA2 PA3 PA4 PA5 PA6 PA7 PA8 PA9 PA10 PA11 PA12 PA13 PA14 PA15 PA16 PA17 PA18 PA19 PA20 Peripheral A PWM0 PWM1 PWM2 TWD TWCK RXD0 TXD0 RTS0 CTS0 DRXD DTXD NPCS0 MISO MOSI SPCK TF TK TD RD RK RF Peripheral B TIOA0 TIOB0 SCK0 NPCS3 TCLK0 NPCS3 PCK0 PWM3 ADTRG NPCS1 NPCS2 PWM0 PWM1 PWM2 PWM3 TIOA1 TIOB1 PCK1 PCK2 FIQ IRQ0 AD0 AD1 AD2 AD3 34 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 AT91SAM7S Series Summary 11.4 Peripheral Identifiers The AT91SAM7S Series embeds a wide range of peripherals. Table 11-3 defines the Peripheral Identifiers of the AT91SAM7S256/128/64/321. Table 11-4 defines the Peripheral Identifiers of the AT91SAM7S32. A peripheral identifier is required for the control of the peripheral interrupt with the Advanced Interrupt Controller and for the control of the peripheral clock with the Power Management Controller. Table 11-3. Peripheral ID 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 - 29 30 31 Peripheral Identifiers (AT91SAM7S256/128/64/321) Peripheral Mnemonic AIC SYSIRQ PIOA Reserved ADC(1) SPI US0 US1 SSC TWI PWMC UDP TC0 TC1 TC2 Reserved AIC AIC Advanced Interrupt Controller Advanced Interrupt Controller IRQ0 IRQ1 Analog-to Digital Converter Serial Peripheral Interface USART 0 USART 1 Synchronous Serial Controller Two-wire Interface PWM Controller USB Device Port Timer/Counter 0 Timer/Counter 1 Timer/Counter 2 (1) Peripheral Name Advanced Interrupt Controller System Interrupt Parallel I/O Controller A External Interrupt FIQ Note: 1. Setting SYSIRQ and ADC bits in the clock set/clear registers of the PMC has no effect. The System Controller is continuously clocked. The ADC clock is automatically started for the first conversion. In Sleep Mode the ADC clock is automatically stopped after each conversion. 35 6175BS-ATARM-04-Nov-05 Table 11-4. Peripheral ID 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 - 29 30 31 Peripheral Identifiers (AT91SAM7S32) Peripheral Mnemonic AIC SYSIRQ PIOA Reserved ADC(1) SPI US Reserved SSC TWI PWMC Reserved TC0 TC1 TC2 Reserved AIC Reserved Advanced Interrupt Controller IRQ0 Timer/Counter 0 Timer/Counter 1 Timer/Counter 2 Synchronous Serial Controller Two-wire Interface PWM Controller Analog-to Digital Converter Serial Peripheral Interface USART (1) Peripheral Name Advanced Interrupt Controller System Interrupt Parallel I/O Controller A External Interrupt FIQ Note: 1. Setting SYSIRQ and ADC bits in the clock set/clear registers of the PMC has no effect. The System Controller is continuously clocked. The ADC clock is automatically started for the first conversion. In Sleep Mode the ADC clock is automatically stopped after each conversion. 11.5 Serial Peripheral Interface * Supports communication with external serial devices - Four chip selects with external decoder allow communication with up to 15 peripherals - Serial memories, such as DataFlash(R) and 3-wire EEPROMs - Serial peripherals, such as ADCs, DACs, LCD Controllers, CAN Controllers and Sensors - External co-processors * Master or slave serial peripheral bus interface - 8- to 16-bit programmable data length per chip select - Programmable phase and polarity per chip select - Programmable transfer delays between consecutive transfers and between clock and data per chip select - Programmable delay between consecutive transfers - Selectable mode fault detection - Maximum frequency at up to Master Clock 36 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 AT91SAM7S Series Summary 11.6 Two-wire Interface * Master Mode only * Compatibility with standard two-wire serial memories * One, two or three bytes for slave address * Sequential read/write operations 11.7 USART * Programmable Baud Rate Generator * 5- to 9-bit full-duplex synchronous or asynchronous serial communications - 1, 1.5 or 2 stop bits in Asynchronous Mode - 1 or 2 stop bits in Synchronous Mode - Parity generation and error detection - Framing error detection, overrun error detection - MSB or LSB first - Optional break generation and detection - By 8 or by 16 over-sampling receiver frequency - Hardware handshaking RTS - CTS - Modem Signals Management DTR-DSR-DCD-RI on USART1 (not present on AT91SAM7S32) - Receiver time-out and transmitter timeguard - Multi-drop Mode with address generation and detection - Manchester Encoder/Decoder on AT91SAM7S256/128 * RS485 with driver control signal * ISO7816, T = 0 or T = 1 Protocols for interfacing with smart cards - NACK handling, error counter with repetition and iteration limit * IrDA modulation and demodulation - Communication at up to 115.2 Kbps * Test Modes - Remote Loopback, Local Loopback, Automatic Echo 11.8 Serial Synchronous Controller * Provides serial synchronous communication links used in audio and telecom applications * Contains an independent receiver and transmitter and a common clock divider * Offers a configurable frame sync and data length * Receiver and transmitter can be programmed to start automatically or on detection of different event on the frame sync signal * Receiver and transmitter include a data signal, a clock signal and a frame synchronization signal 11.9 Timer Counter * Three 16-bit Timer Counter Channels 37 6175BS-ATARM-04-Nov-05 - Three output compare or two input capture * Wide range of functions including: - Frequency measurement - Event counting - Interval measurement - Pulse generation - Delay timing - Pulse Width Modulation - Up/down capabilities * Each channel is user-configurable and contains: - Three external clock inputs - Five internal clock inputs, as defined in Table 11-5 Table 11-5. Timer Counter Clocks Assignment Clock MCK/2 MCK/8 MCK/32 MCK/128 MCK/1024 TC Clock Input TIMER_CLOCK1 TIMER_CLOCK2 TIMER_CLOCK3 TIMER_CLOCK4 TIMER_CLOCK5 - Two multi-purpose input/output signals - Two global registers that act on all three TC channels 11.10 PWM Controller * Four channels, one 16-bit counter per channel * Common clock generator, providing thirteen different clocks - One Modulo n counter providing eleven clocks - Two independent linear dividers working on modulo n counter outputs * Independent channel programming - Independent enable/disable commands - Independent clock selection - Independent period and duty cycle, with double bufferization - Programmable selection of the output waveform polarity - Programmable center or left aligned output waveform 11.11 USB Device Port (Only on AT91SAM7S256/128/64/321) * USB V2.0 full-speed compliant,12 Mbits per second. * Embedded USB V2.0 full-speed transceiver * Embedded 328-byte dual-port RAM for endpoints * Four endpoints 38 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 AT91SAM7S Series Summary - Endpoint 0: 8 bytes - Endpoint 1 and 2: 64 bytes ping-pong - Endpoint 3: 64 bytes - Ping-pong Mode (two memory banks) for bulk endpoints * Suspend/resume logic 11.12 Analog-to-digital Converter * 8-channel ADC * 10-bit 384 Ksamples/sec. Successive Approximation Register ADC * -3/+3 LSB Integral Non Linearity, -2/+2 LSB Differential Non Linearity * Integrated 8-to-1 multiplexer, offering eight independent 3.3V analog inputs * External voltage reference for better accuracy on low voltage inputs * Individual enable and disable of each channel * Multiple trigger source - Hardware or software trigger - External trigger pin - Timer Counter 0 to 2 outputs TIOA0 to TIOA2 trigger * Sleep Mode and conversion sequencer - Automatic wakeup on trigger and back to sleep mode after conversions of all enabled channels * Four of eight analog inputs shared with digital signals 39 6175BS-ATARM-04-Nov-05 12. AT91SAM7S Series Ordering Information Table 12-1. Ordering Information Package LQFP 64 LQFP 64 LQFP 64 LQFP 64 LQFP 48 Package Type Green Green Green Green Green ROM Code Revision 001 001 001 001 001 Temperature Operating Range Industrial (-40 C to 85 C) Industrial (-40 C to 85 C) Industrial (-40 C to 85 C) Industrial (-40 C to 85 C) Industrial (-40 C to 85 C) Ordering Code AT91SAM7S256-AU-001 AT91SAM7S128-AU-001 AT91SAM7S64-AU-001 AT91SAM7S321-AU-001 AT91SAM7S32-AU-001 40 AT91SAM7S Series Summary 6175BS-ATARM-04-Nov-05 AT91SAM7S Series Summary Revision History Table 12-2. Revision History Change Request Ref. Doc. Rev 6175AS 6175BS Comments First issue - Unqualified on Intranet Corresponds to 6175A full datasheet approval loop. Qualified on Intranet. Section 9. "Memory", on page 17 updated: 2 ms => 3 ms, 10 ms => 15 ms, 4 ms => 6 ms CSR05-529 41 6175BS-ATARM-04-Nov-05 Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600 Atmel Operations Memory 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 436-4314 RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany Tel: (49) 71-31-67-0 Fax: (49) 71-31-67-2340 1150 East Cheyenne Mtn. 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Blvd. Colorado Springs, CO 80906, USA Tel: 1(719) 576-3300 Fax: 1(719) 540-1759 Scottish Enterprise Technology Park Maxwell Building East Kilbride G75 0QR, Scotland Tel: (44) 1355-803-000 Fax: (44) 1355-242-743 Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan Tel: (81) 3-3523-3551 Fax: (81) 3-3523-7581 Literature Requests www.atmel.com/literature Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN ATMEL'S TERMS AND CONDITIONS OF SALE LOCATED ON ATMEL'S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDENTAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION) ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and product descriptions at any time without notice. Atmel does not make any commitment to update the information contained herein. Unless specifically provided otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel's products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life. (c) Atmel Corporation 2005. All rights reserved. Atmel(R), logo and combinations thereof, Everywhere You Are(R) and others, are registered trademarks or trademarks of Atmel Corporation or its subsidiaries. ARM(R), the ARM Powered(R) logo, and others, are registered trademarks or trademarks of ARM Limited. Other terms and product names may be trademarks of others. Printed on recycled paper. 6175BS-ATARM-04-Nov-05 |
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