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| CHENGPIN Devices Included in this Data Sheet: * CP8056P : EPROM devices * CP8056P : Mask ROM devices CP8056 EPROM/ROM-Based 8-Bit Microcontroller Series FEATURES * Only 42 single word instructions * All instructions are single cycle except for program branches which are two-cycle * 13-bit wide instructions * All ROM/EPROM area GOTO instruction * All ROM/EPROM area subroutine CALL instruction * 8-bit wide data path * 5-level deep hardware stack * Operating speed: DC-20 MHz clock input DC-100 ns instruction cycle Device CP8056 Pins # 18 I/O # 12 EPROM/ROM (Byte) 1K RAM (Byte) 49 * Direct, indirect addressing modes for data accessing * 8-bit real time clock/counter (Timer0) with 8-bit programmable prescaler * Internal Power-on Reset (POR) * Built-in Low Voltage Detector (LVD) for Brown-out Reset (BOR) * Power-up Reset Timer (PWRT) and Oscillator Start-up Timer(OST) * On chip Watchdog Timer (WDT) with internal oscillator for reliable operation and soft-ware watch-dog enable/disable control * Two I/O ports IOA and IOB with independent direction control * Soft-ware I/O pull-high/pull-down or open-drain control * One internal interrupt source: Timer0 overflow; Two external interrupt source: INT pin, Port B input change * Wake-up from SLEEP by INT pin or Port B input change * Power saving SLEEP mode * Programmable Code Protection * Selectable oscillator options: - RC: Resistor/Capacitor Oscillator - XT: Crystal/Resonator Oscillator - HF: High Frequency Crystal/Resonator Oscillator - LF: Low Frequency Crystal Oscillator * Wide-operating voltage range: - EPROM : 2.3V to 5.5V - ROM : 2.3V to 5.5V P.1/CP8056 CHENGPIN GENERAL DESCRIPTION CP8056 The CP8056 series is a family of low-cost, high speed, high noise immunity, EPROM/ROM-based 8-bit CMOS microcontrollers. It employs a RISC architecture with only 42 instructions. All instructions are single cycle except for program branches which take two cycles. The easy to use and easy to remember instruction set reduces development time significantly. The CP8056 series consists of Power-on Reset (POR), Brown-out Reset (BOR), Power-up Reset Timer (PWRT), Oscillator Start-up Timer(OST), Watchdog Timer, EPROM/ROM, SRAM, tri-state I/O port, I/O pull-high/open-drain/pull-down control, Power saving SLEEP mode, real time programmable clock/counter, Interrupt, Wake-up from SLEEP mode, and Code Protection for EPROM products. There are four oscillator configurations to choose from, including the power-saving LP (Low Power) oscillator and cost saving RC oscillator. The CP8056 address 1Kx13 of program memory. The CP8056 can directly or indirectly address its register files and data memory. All special function registers including the program counter are mapped in the data memory. BLOCK DIAGRAM Oscillator Circuit 5-level STACK Watchdog Timer Program Counter FSR SRAM ALU EPROM / ROM Instruction Decoder PORTA PORTB Interrupt Control Timer0 Accumulator P.2/CP8056 CHENGPIN PIN CONNECTION PDIP, SOP IOA2 IOA3 T0CKI RSTB Vss IOB0/INT IOB1 IOB2 IOB3 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 IOA1 IOA0 OSCI OSCO Vdd IOB7 IOB6 IOB5 IOB4 CP8056 SSOP, TSSOP IOA2 IOA3 T0CKI RSTB Vss Vss IOB0/INT IOB1 IOB2 IOB3 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 14 13 12 11 IOA1 IOA0 OSCI OSCO Vdd IOB7 IOB6 IOB5 IOB4 CP8056P/56S CP8056SS/TS 15 Vdd PIN DESCRIPTIONS Description IOA0 ~ IOA3 as bi-direction I/O port Bi-direction I/O pin with system wake-up function / External interrupt input Bi-direction I/O port with system wake-up function Clock input to Timer0. Must be tied to Vss or Vdd, if not in use, to reduce current T0CKI I consumption RSTB I System clear (RESET) input. This pin is an active low RESET to the device. X'tal type: Oscillator crystal input OSCI I RC type: Clock input of RC oscillator X'tal type: Oscillator crystal output. OSCO O RC mode: Outputs with the instruction cycle rate Vdd Positive supply Vss Ground Legend: I=input, O=output, I/O=input/output Name IOA0 ~ IOA3 IOB0/INT IOB1 ~ IOB7 I/O I/O I/O I/O P.3/CP8056 CHENGPIN 1.0 MEMORY ORGANIZATION CP8056 memory is organized into program memory and data memory. 1.1 Program Memory Organization CP8056 The CP8056 have a 10-bit Program Counter capable of addressing a 1Kx13 program memory space. The RESET vector for the CP8056 is at 3FFh. The H/W interrupt vector is at 008h. And the S/W interrupt vector is at 002h. CP8056 supports all ROM/EPROM area CALL/GOTO instructions without page. FIGURE 1.1: Program Memory Map and STACK PC<9:0> Stack 1 Stack 2 Stack 3 Stack 4 Stack 5 3FFh Reset Vector : : 008h H/W Interrupt Vector 002h S/W Interrupt Vector 000h CP8056 P.4/CP8056 CHENGPIN CP8056 1.2 Data Memory Organization Data memory is composed of Special Function Registers and General Purpose Registers. The General Purpose Registers are accessed either directly or indirectly through the FSR register. The Special Function Registers are registers used by the CPU and peripheral functions to control the operation of the device. TABLE 1.1: Registers File Map for CP8056 Series Address Description 00h 01h 02h 03h 04h 05h 06h 07h 08h 09h 0Ah 0Bh 0Ch 0Dh 0Eh 0Fh 10h ~ 3Fh INDF TMR0 PCL STATUS FSR PORTA PORTB General Purpose Register PCON WUCON PCHBUF PDCON ODCON PHCON INTEN INTFLAG General Purpose Registers N/A OPTION 05h 06h IOSTA IOSTB TABLE 1.2: The Registers Controlled by OPTION or IOST Instructions Address Name B7 B6 B5 B4 B3 N/A (w) 05h (w) 06h (w) OPTION IOSTA IOSTB INTEDG T0CS B2 B1 PS1 B0 PS0 T0SE PSA PS2 Port A I/O Control Register Port B I/O Control Register TABLE 1.3: Operational Registers Map Address Name B7 B6 00h (r/w) 01h (r/w) 02h (r/w) 03h (r/w) 04h (r/w) 05h (r/w) 06h (r/w) 07h (r/w) 08h (r/w) 09h (r/w) 0Ah (r/w) 0Bh (r/w) 0Ch (r/w) 0Dh (r/w) 0Eh (r/w) 0Fh (r/w) INDF TMR0 PCL STATUS FSR PORTA PORTB SRAM PCON WUCON PCHBUF (1) PDCON ODCON PHCON INTEN INTFLAG B5 B4 B3 B2 B1 B0 Uses contents of FSR to address data memory (not a physical register) 8-bit real-time clock/counter Low order 8 bits of PC GP2 GP1 GP0 TO PD Z DC C * * Indirect data memory address pointer IOA3 IOA2 IOA1 IOA0 IOB7 IOB6 IOB5 IOB4 IOB3 IOB2 IOB1 IOB0 General Purpose Registers WDTE EIS LVDTE ROC WUB7 WUB6 WUB5 WUB4 WUB3 WUB2 WUB1 WUB0 2 MSBs Buffer of PC /PDB3 /PDB2 /PDB1 /PDB0 /PDA3 /PDA2 /PDA1 /PDA0 ODB7 ODB6 ODB5 ODB4 ODB3 ODB2 ODB1 ODB0 /PHB7 /PHB6 /PHB5 /PHB4 /PHB3 /PHB2 /PHB1 /PHB0 GIE INTIE PBIE T0IE INTIF PBIF T0IF Legend: - = unimplemented, read as `0', * = unimplemented, read as `1' Note 1 : There are 2 bits in CP8056. P.5/CP8056 CHENGPIN 2.0 FUNCTIONAL DESCRIPTIONS 2.1 Operational Registers 2.1.1 INDF (Indirect Addressing Register) Address 00h (r/w) Name INDF B7 B6 B5 B4 B3 B2 CP8056 B1 B0 Uses contents of FSR to address data memory (not a physical register) The INDF Register is not a physical register. Any instruction accessing the INDF register can actually access the register pointed by FSR Register. Reading the INDF register itself indirectly (FSR="0") will read 00h. Writing to the INDF register indirectly results in a no-operation (although status bits may be affected). The bits 5-0 of FSR register are used to select up to 64 registers (address: 00h ~ 3Fh). EXAMPLE 2.1: INDIRECT ADDRESSING * Register file 38 contains the value 10h * Register file 39 contains the value 0Ah * Load the value 38 into the FSR Register * A read of the INDF Register will return the value of 10h * Increment the value of the FSR Register by one (@FSR=39h) * A read of the INDR register now will return the value of 0Ah. FIGURE 2.1: Direct/Indirect Addressing Direct Addressing 5 from opcode 0 Indirect Addressing 5 from FSR register 0 location select 00h location select addressing INDF register 3Fh P.6/CP8056 CHENGPIN 2.1.2 TMR0 (Time Clock/Counter register) Address 01h (r/w) Name TMR0 B7 B6 B5 B4 B3 B2 8-bit real-time clock/counter CP8056 B1 B0 The Timer0 is a 8-bit timer/counter. The clock source of Timer0 can come from the instruction cycle clock or by an external clock source (T0CKI pin) defined by T0CS bit (OPTION<5>). If T0CKI pin is selected, the Timer0 is increased by T0CKI signal rising/falling edge (selected by T0SE bit (OPTION<4>)). The prescaler is assigned to Timer0 by clearing the PSA bit (OPTION<3>). In this case, the prescaler will be cleared when TMR0 register is written with a value. 2.1.3 PCL (Low Bytes of Program Counter) & Stack Address 02h (r/w) Name PCL B7 B6 B5 B4 B3 Low order 8 bits of PC B2 B1 B0 CP8056 devices have 10-bit wide Program Counter (PC) and five-level deep 10-bit hardware push/pop stack. The low byte of PC is called the PCL register. This register is readable and writable. The high byte of PC is called the PCH register. This register contains the PC<9:8> bits and is not directly readable or writable. All updates to the PCH register go through the PCHBUF register. As a program instruction is executed, the Program Counter will contain the address of the next program instruction to be executed. The PC value is increased by one, every instruction cycle, unless an instruction changes the PC. For a GOTO instruction, the PC<9:0> is provided by the GOTO instruction word. The PCL register is mapped to PC<7:0>, and the PCHBUF register is not updated. For a CALL instruction, the PC<9:0> is provided by the CALL instruction word. The next PC will be loaded (PUSHed) onto the top of STACK. The PCL register is mapped to PC<7:0>, and the PCHBUF register is not updated. For a RETIA, RETFIE, or RETURN instruction, the PC are updated (POPed) from the top of STACK. The PCL register is mapped to PC<7:0>, and the PCHBUF register is not updated. For any instruction where the PCL is the destination, the PC<7:0> is provided by the instruction word. However, the PC<9:8> will come from the PCHBUF<1:0> register (PCHBUF PCH). PCHBUF register is never updated with the contents of PCH. P.7/CP8056 CHENGPIN FIGURE 2.2: Loading of PC in Different Situations Situation 1: GOTO Instruction PCH 98 PC Opcode<9:0> PCHBUF PCL 7 0 CP8056 Situation 2: CALL Instruction PCH 98 PC Opcode<9:0> PCHBUF PCL 7 0 STACK<9:0> Situation 3: RETIA, RETFIE, or RETURN Instruction STACK<9:0> PCH 98 PC PCL 7 0 - - - - - PCHBUF Situation 4: Instruction with PCL as destination PCH 98 PC PCHBUF<1:0> PCHBUF ALU result<7:0> or Opcode<7:0> PCL 7 0 Note: PCHBUF is used only for instruction with PCL as destination for CP8056. P.8/CP8056 CHENGPIN 2.1.4 STATUS (Status Register) Address 03h (r/w) Name STATUS B7 GP2 B6 GP1 B5 GP0 B4 TO B3 PD CP8056 B2 Z B1 DC B0 C This register contains the arithmetic status of the ALU, the RESET status. If the STATUS Register is the destination for an instruction that affects the Z, DC or C bits, then the write to these three bits is disabled. These bits are set or cleared according to the device logic. Furthermore, the TO and PD bits are not writable. Therefore, the result of an instruction with the STATUS Register as destination may be different than intended. For example, CLRR STATUS will clear the upper three bits and set the Z bit. This leaves the STATUS Register as 000u u1uu (where u = unchanged). C : Carry/borrow bit. ADDAR, ADDIA = 1, a carry occurred. = 0, a carry did not occur. SUBAR, SUBIA = 1, a borrow did not occur. = 0, a borrow occurred. Note : A subtraction is executed by adding the two's complement of the second operand. For rotate (RRR, RLR) instructions, this bit is loaded with either the high or low order bit of the source register. DC : Half carry/half borrow bit. ADDAR, ADDIA = 1, a carry from the 4th low order bit of the result occurred. = 0, a carry from the 4th low order bit of the result did not occur. SUBAR, SUBIA = 1, a borrow from the 4th low order bit of the result did not occur. = 0, a borrow from the 4th low order bit of the result occurred. Z : Zero bit. = 1, the result of a logic operation is zero. = 0, the result of a logic operation is not zero. PD : Power down flag bit. = 1, after power-up or by the CLRWDT instruction. = 0, by the SLEEP instruction. TO : Time overflow flag bit. = 1, after power-up or by the CLRWDT or SLEEP instruction. = 0, a watch-dog time overflow occurred. GP2:GP0 : General purpose read/write bits. 2.1.5 FSR (Indirect Data Memory Address Pointer) Address 04h (r/w) Name FSR B7 * B6 * B5 B4 B3 B2 B1 B0 Indirect data memory address pointer Bit5:Bit0 : Select registers address in the indirect addressing mode. See 2.1.1 for detail description. Bit7:Bit6 : Not used. Read as "1"s. P.9/CP8056 CHENGPIN 2.1.6 PORTA & PORTB (Port Data Registers) Address 05h (r/w) 06h (r/w) Name PORTA PORTB B7 IOB7 B6 IOB6 B5 IOB5 B4 IOB4 B3 IOA3 IOB3 B2 IOA2 IOB2 CP8056 B1 IOA1 IOB1 B0 IOA0 IOB0 Reading the port (PORTA, PORTB register) reads the status of the pins independent of the pin's input/output modes. Writing to these ports will write to the port data latch. PORTA is a 4-bit port data Register. Only the low order 4 bits are used (PORTA<3:0>). Bits 7-4 are unimplemented and read as `0's. PORTB is a 8-bit port data register. 2.1.7 PCON (Power Control Register) Address 08h (r/w) Name PCON B7 WDTE B6 EIS B5 LVDTE B4 ROC B3 B2 B1 B0 - Bit3:Bit0 : Not used. Read as "0"s. ROC : R-option function of IOA0 and IOA1 pins enable bit. = 0, Disable the R-option function. = 1, Enable the R-option function. In this case, if a 430K external resister is connected/disconnected to Vss, the status of IOA0 (IOA1) is read as "0"/"1". LVDTE : LVDT (low voltage detector) enable bit. = 0, Disable LVDT. = 1, Enable LVDT. EIS : Define the function of IOB0/INT pin. = 0, IOB0 (bi-directional I/O pin) is selected. The path of INT is masked. = 1, INT (external interrupt pin) is selected. In this case, the I/O control bit of IOB0 must be set to "1". The path of Port B input change of IOB0 pin is masked by hardware, the status of INT pin can also be read by way of reading PORTB. WDTE : WDT (watch-dog timer) enable bit. = 0, Disable WDT. = 1, Enable WDT. 2.1.8 WUCON (Port B Input Change Interrupt/Wake-up Control Register) Address 09h (r/w) Name WUCON B7 WUB7 B6 WUB6 B5 WUB5 B4 WUB4 B3 WUB3 B2 WUB2 B1 WUB1 B0 WUB0 WUB0 : = 0, Disable the input change interrupt/wake-up function of IOB0 pin. = 1, Enable the input change interrupt/wake-up function of IOB0 pin. WUB1 : = 0, Disable the input change interrupt/wake-up function of IOB1 pin. = 1, Enable the input change interrupt/wake-up function of IOB1 pin. WUB2 : = 0, Disable the input change interrupt/wake-up function of IOB2 pin. = 1, Enable the input change interrupt/wake-up function of IOB2 pin. WUB3 : = 0, Disable the input change interrupt/wake-up function of IOB3 pin. = 1, Enable the input change interrupt/wake-up function of IOB3 pin. P.10/CP8056 CHENGPIN WUB4 : = 0, Disable the input change interrupt/wake-up function of IOB4 pin. = 1, Enable the input change interrupt/wake-up function of IOB4 pin. WUB5 : = 0, Disable the input change interrupt/wake-up function of IOB5 pin. = 1, Enable the input change interrupt/wake-up function of IOB5 pin. WUB6 : = 0, Disable the input change interrupt/wake-up function of IOB6 pin. = 1, Enable the input change interrupt/wake-up function of IOB6 pin. WUB7 : = 0, Disable Enable the input change interrupt/wake-up function of IOB7 pin. = 1, Enable the input change interrupt/wake-up function of IOB7 pin. 2.1.9 PCHBUF (High Byte Buffer of Program Counter) Address 0Ah (r/w) Name PCHBUF B7 B6 B5 B4 B3 B2 CP8056 B1 B0 2 MSBs Buffer of PC There are 2 bits in CP8056. See 2.1.3 for detail description. 2.1.10 PDCON (Pull-down Control Register) Address 0Bh (r/w) Name PDCON B7 /PDB3 B6 /PDB2 B5 /PDB1 B4 /PDB0 B3 /PDA3 B2 /PDA2 B1 /PDA1 B0 /PDA0 /PDA0 : = 0, Enable the internal pull-down of IOA0 pin. = 1, Disable the internal pull-down of IOA0 pin. /PDA1 : = 0, Enable the internal pull-down of IOA1 pin. = 1, Disable the internal pull-down of IOA1 pin. /PDA2 : = 0, Enable the internal pull-down of IOA2 pin. = 1, Disable the internal pull-down of IOA2 pin. /PDA3 : = 0, Enable the internal pull-down of IOA3 pin. = 1, Disable the internal pull-down of IOA3 pin. /PDB0 : = 0, Enable the internal pull-down of IOB0 pin. = 1, Disable the internal pull-down of IOB0 pin. /PDB1 : = 0, Enable the internal pull-down of IOB1 pin. = 1, Disable the internal pull-down of IOB1 pin. /PDB2 : = 0, Enable the internal pull-down of IOB2 pin. = 1, Disable the internal pull-down of IOB2 pin. /PDB3 : = 0, Enable the internal pull-down of IOB3 pin. = 1, Disable the internal pull-down of IOB3 pin. P.11/CP8056 CHENGPIN 2.1.11 ODCON (Open-drain Control Register) Address 0Ch (r/w) Name ODCON B7 ODB7 B6 ODB6 B5 ODB5 B4 ODB4 B3 ODB3 B2 ODB2 CP8056 B1 ODB1 B0 ODB0 ODB0 : = 0, Disable the internal open-drain of IOB0 pin. = 1, Enable the internal open-drain of IOB0 pin. ODB1 : = 0, Disable the internal open-drain of IOB1 pin. = 1, Enable the internal open-drain of IOB1 pin. ODB2 : = 0, Disable the internal open-drain of IOB2 pin. = 1, Enable the internal open-drain of IOB2 pin. ODB3 : = 0, Disable the internal open-drain of IOB3 pin. = 1, Enable the internal open-drain of IOB3 pin. ODB4 : = 0, Disable the internal open-drain of IOB4 pin. = 1, Enable the internal open-drain of IOB4 pin. ODB5 : = 0, Disable the internal open-drain of IOB5 pin. = 1, Enable the internal open-drain of IOB5 pin. ODB6 : = 0, Disable the internal open-drain of IOB6 pin. = 1, Enable the internal open-drain of IOB6 pin. ODB7 : = 0, Disable the internal open-drain of IOB7 pin. = 1, Enable the internal open-drain of IOB7 pin. 2.1.12 PHCON (Pull-high Control Register) Address 0Dh (r/w) Name PHCON B7 /PHB7 B6 /PHB6 B5 /PHB5 B4 /PHB4 B3 /PHB3 B2 /PHB2 B1 /PHB1 B0 /PHB0 /PHB0 : = 0, Enable the internal pull-high of IOB0 pin. = 1, Disable the internal pull-high of IOB0 pin. /PHB1 : = 0, Enable the internal pull-high of IOB1 pin. = 1, Disable the internal pull-high of IOB1 pin. /PHB2 : = 0, Enable the internal pull-high of IOB2 pin. = 1, Disable the internal pull-high of IOB2 pin. /PHB3 : = 0, Enable the internal pull-high of IOB3 pin. = 1, Disable the internal pull-high of IOB3 pin. /PHB4 : = 0, Enable the internal pull-high of IOB4 pin. = 1, Disable the internal pull-high of IOB4 pin. /PHB5 : = 0, Enable the internal pull-high of IOB5 pin. = 1, Disable the internal pull-high of IOB5 pin. /PHB6 : = 0, Enable the internal pull-high of IOB6 pin. = 1, Disable the internal pull-high of IOB6 pin. P.12/CP8056 CHENGPIN /PHB7 : = 0, Enable the internal pull-high of IOB7 pin. = 1, Disable the internal pull-high of IOB7 pin. 2.1.13 INTEN (Interrupt Mask Register) Address 0Eh (r/w) Name INTEN B7 GIE B6 B5 B4 B3 B2 INTIE CP8056 B1 PBIE B0 T0IE T0IE : Timer0 overflow interrupt enable bit. = 0, Disable the Timer0 overflow interrupt. = 1, Enable the Timer0 overflow interrupt. PBIE : Port B input change interrupt enable bit. = 0, Disable the Port B input change interrupt. = 1, Enable the Port B input change interrupt . INTIE : External INT pin interrupt enable bit. = 0, Disable the External INT pin interrupt. = 1, Enable the External INT pin interrupt. Bit6:BIT3 : Not used. Read as "0"s. GIE : Global interrupt enable bit. = 0, Disable all interrupts. For wake-up from SLEEP mode through an interrupt event, the device will continue execution at the instruction after the SLEEP instruction. = 1, Enable all un-masked interrupts. For wake-up from SLEEP mode through an interrupt event, the device will branch to the interrupt address (008h). Note : When an interrupt event occur with the GIE bit and its corresponding interrupt enable bit are all set, the GIE bit will be cleared by hardware to disable any further interrupts. The RETFIE instruction will exit the interrupt routine and set the GIE bit to re-enable interrupt. 2.1.14 INTFLAG (Interrupt Status Register) Address 0Fh (r/w) Name INTFLAG B7 B6 B5 B4 B3 B2 INTIF B1 PBIF B0 T0IF T0IF : Timer0 overflow interrupt flag. Set when Timer0 overflows, reset by software. PBIF : Port B input change interrupt flag. Set when Port B input changes, reset by software. INTIF : External INT pin interrupt flag. Set by rising/falling (selected by INTEDG bit (OPTION<6>)) edge on INT pin, reset by software. Bit7:BIT3 : Not used. Read as "0"s. 2.1.15 ACC (Accumulator) Address N/A (r/w) Name ACC B7 B6 B5 B4 B3 B2 B1 B0 Accumulator Accumulator is an internal data transfer, or instruction operand holding. It can not be addressed. 2.1.16 OPTION Register P.13/CP8056 CHENGPIN Address N/A (w) Name OPTION B7 B6 INTEDG B5 T0CS B4 T0SE B3 PSA B2 PS2 CP8056 B1 PS1 B0 PS0 By executing the OPTION instruction, the contents of the ACC Register will be transferred to the OPTION Register. The OPTION Register is a 7-bit wide, write-only register which contains various control bits to configure the Timer0/WDT prescaler, Timer0, and the external INT interrupt. The OPTION Register are "write-only" and are set all "1"s except INTEDG bit. PS2:PS0 : Prescaler rate select bits. PS2:PS0 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 Timer0 Rate 1:2 1:4 1:8 1:16 1:32 1:64 1:128 1:256 WDT Rate 1:1 1:2 1:4 1:8 1:16 1:32 1:64 1:128 PSA : Prescaler assign bit. = 1, WDT (watch-dog timer). = 0, TMR0 (Timer0). T0SE : TMR0 source edge select bit. = 1, Falling edge on T0CKI pin. = 0, Rising edge on T0CKI pin. T0CS : TMR0 clock source select bit. = 1, External T0CKI pin. = 0, internal instruction clock cycle. INTEDG : Interrupt edge select bit. = 1, interrupt on rising edge of INT pin. = 0, interrupt on falling edge of INT pin. Bit7 : Not used. 2.1.17 IOSTA, & IOSTB (Port I/O Control Registers) Address N/A (w) N/A (w) Name IOSTA IOSTB B7 B6 B5 B4 B3 B2 B1 B0 Port A I/O Control Register Port B I/O Control Register The Port I/O Control Registers are loaded with the contents of the ACC Register by executing the IOST R (05h~06h) instruction. A `1' from a IOST Register bit puts the corresponding output driver in hi-impedance state (input mode). A `0' enables the output buffer and puts the contents of the output data latch on the selected pins (output mode). The IOST Registers are "write-only" and are set (output drivers disabled) upon RESET. P.14/CP8056 CHENGPIN 2.2 I/O Ports CP8056 Port A and port B are bi-directional tri-state I/O ports. Port A is a 4-pin I/O port. Port B is a 8-pin I/O ports. Port C is a general purpose register. All I/O pins (IOA<3:0> and IOB<7:0>) have data direction control registers (IOSTA, IOSTB) which can configure these pins as output or input. IOB<7:0> have its corresponding pull-high control bits (PHCON register) to enable the weak internal pull-high. The weak pull-high is automatically turned off when the pin is configured as an output pin. IOA<3:0> and IOB<3:0> have its corresponding pull-down control bits (PDCON register) to enable the weak internal pull-down. The weak pull-down is automatically turned off when the pin is configured as an output pin. IOB<7:0> have its corresponding open-drain control bits (ODCON register) to enable the open-drain output when these pins are configured to be an output pin. IOA0 and IOA1 are the R-option pins enabled by setting the ROC bit (PCON<4>). When the R-option function is used, it is recommended that IOA0 and IOA1 are used as output pins, and read the status of IOA0 and IOA1 before these pins are configured to be an output pin. IOB<7:0> also provides the input change interrupt/wake-up function. Each pin has its corresponding input change interrupt/wake-up enable bits (WUCON) to select the input change interrupt/wake-up source. The IOB0 is also an external interrupt input signal by setting the EIS bit (PCON<6>). In this case, IOB0 input change interrupt/wake-up function will be disabled by hardware even if it is enabled by software. FIGURE 2.3: Block Diagram of I/O PINs IOA3 ~ IOA0 : Data bus D IOST Latch Q IOST R > EN Q I/O PIN D DATA Latch WR PORT > EN Q Q RD PORT Pull-down is not shown in the figure P.15/CP8056 CHENGPIN IOB0/INT : Data bus D IOST Latch IOST R > EN Q CP8056 Q I/O PIN D DATA Latch WR PORT > EN Q Q RD PORT Q Latch Q Set PBIF WUBn EIS INT D EN< INTEDG EIS Pull-high/pull-down and open-drain are not shown in the figure IOB7 ~ IOB1 : Data bus D IOST Latch IOST R > EN Q Q I/O PIN D DATA Latch WR PORT > EN Q Q RD PORT Q Latch Q Set PBIF WUBn D EN< Pull-high/pull-down and open-drain are not shown in the figure P.16/CP8056 CHENGPIN 2.3 Timer0/WDT & Prescler 2.3.1 Timer0 CP8056 The Timer0 is a 8-bit timer/counter. The clock source of Timer0 can come from the internal clock or by an external clock source (T0CKI pin). 2.3.1.1 Using Timer0 with an Internal Clock : Timer mode Timer mode is selected by clearing the T0CS bit (OPTION<5>). In timer mode, the timer0 register (TMR0) will increment every instruction cycle (without prescaler). If TMR0 register is written, the increment is inhibited for the following two cycles. 2.3.1.2 Using Timer0 with an External Clock : Counter mode Counter mode is selected by setting the T0CS bit (OPTON<5>). In this mode, Timer0 will increment either on every rising or falling edge of pin T0CKl. The incrementing edge is determined by the source edge select the rising edge. The external clock requirement is due to internal phase clock (Tosc) synchronization. Also, there is a delay in the actual incrementing of Timer0 after synchronization. When no prescaler is used, the external clock input is the same as the prescaler output. The synchronization of T0CKI with the internal phase clocks is accomplished by sampling the prescaler output on the T2 and T4 cycles of the internal phase clocks. Therefore, it is necessary for T0CKI to be high for at least 2 TOSC and low for at least 2 Tosc. When a prescaler is used, the external clock input is divided by the asynchronous prescaler. For the external clock to meet the sampling requirement, the ripple counter must be taken into account. Therefore, it is necessary for T0CKI to have a period of at least 4Tosc divided by the prescaler value. 2.3.2 Watchdog Timer (WDT) The Watchdog Timer (WDT) is a free running on-chip RC oscillator which does not require any external components. So the WDT will still run even if the clock on the OSCI and OSCO pins is turned off, such as in SLEEP mode. During normal operation or in SLEEP mode, a WDT time-out will cause the device reset and the TO bit (STATUS<4>) will be cleared. The WDT can be disabled by clearing the control bit WDTE (PCON<7>) to "0". The WDT has a nominal time-out period of 18 ms (without prescaler). If a longer time-out period is desired, a prescaler with a division ratio of up to 1:128 can be assigned to the WDT controlled by the OPTION register. Thus, the longest time-out period is approxmately 2.3 seconds. The CLRWDT instruction clears the WDT and the prescaler, if assigned to the WDT, and prevents it from timing out and generating a device reset. The SLEEP instruction resets the WDT and the prescaler, if assigned to the WDT. This gives the maximum SLEEP time before a WDT Wake-up Reset. 2.3.3 Prescaler An 8-bit counter (down counter) is available as a prescaler for the Timer0, or as a postscaler for the Watchdog Timer (WDT). Note that the prescaler may be used by either the Timer0 module or the WDT, but not both. Thus, a prescaler assignment for the Timer0 means that there is no prescaler for the WDT, and vice-versa. The PSA bit (OPTION<3>) determines prescaler assignment. The PS<2:0> bits (OPTION<2:0>) determine prescaler ratio. When the prescaler is assigned to the Timer0 module, all instructions writing to the TMR0 register will clear the prescaler. When it is assigned to WDT, a CLRWDT instruction will clear the prescaler along with the WDT. The prescaler is neither readable nor writable. On a RESET, the prescaler contains all `1's. To avoid an unintended device reset, CLRWDT or CLRR TMR0 instructions must be executed when changing the prescaler assignment from Timer0 to the WDT, and vice-versa. P.17/CP8056 CHENGPIN FIGURE 2.4: Block Diagram of The Timer0/WDT Prescaler Instruction Cycle (Fosc/4 or Fosc/2 or Fosc/8) 0 T0CKI T0SE 1 MUX 1 0 T0CS PSA MUX Sync 2 Cycles CP8056 TMR0 Register 8 Data Bus Set T0IF flag on overflow 0 Watchdog Timer 1 MUX 8-Bit Prescaler PS2:PS0 PSA 1 0 PSA MUX WDT Time-out 2.4 Interrupts The CP8056 series has up to three sources of interrupt: 1. External interrupt INT pin. 2. TMR0 overflow interrupt. 3. Port B input change interrupt (pins IOB7:IOB0). INTFLAG is the interrupt flag register that recodes the interrupt requests in the relative flags. A global interrupt enable bit, GIE (INTEN<7>), enables (if set) all un-masked interrupts or disables (if cleared) all interrupts. Individual interrupts can be enabled/disabled through their corresponding enable bits in INTEN register regardless of the status of the GIE bit. When an interrupt event occur with the GIE bit and its corresponding interrupt enable bit are all set, the GIE bit will be cleared by hardware to disable any further interrupts, and the next instruction will be fetched from address 008h. The interrupt flag bits must be cleared by software before re-enabling GIE bit to avoid recursive interrupts. The RETFIE instruction exits the interrupt routine and set the GIE bit to re-enable interrupt. The flag bit (except PBIF bit) in INTFLAG register is set by interrupt event regardless of the status of its mask bit. Reading the INTFLAG register will be the logic AND of INTFLAG and INTEN. When an interrupt is generated by the INT instruction, the next instruction will be fetched from address 002h. 2.4.1 External INT Interrupt External interrupt on INT pin is rising or falling edge triggered selected by INTEDG (OPTION<6>). When a valid edge appears on the INT pin the flag bit INTIF (INTFLAG<2>) is set. This interrupt can be disabled by clearing INTIE bit (INTEN<2>). The INT pin interrupt can wake-up the system from SLEEP condition, if bit INTIE was set before going to SLEEP. If GIE bit was set, the program will execute interrupt service routine after wake-up; or if GIE bit was cleared, the program will execute next PC after wake-up. 2.4.2 Timer0 Interrupt An overflow (FFh 00h) in the TMR0 register will set the flag bit T0IF (INTFLAG<0>). This interrupt can be disabled by clearing T0IE bit (INTEN<0>). 0 P.18/CP8056 CHENGPIN 2.4.3 Port B Input Change Interrupt CP8056 An input change on IOB<7:0> set flag bit PBIF (INTFLAG<1>). This interrupt can be disabled by clearing PBIE bit (INTEN<1>). Before the port B input change interrupt is enabled, reading PORTB (any instruction accessed to PORTB, including read/write instructions) is necessary. Any pin which corresponding WUBn bit (WUCON<7:0>) is cleared to "0" or configured as output or IOB0 pin configured as INT pin will be excluded from this function. The port B input change interrupt also can wake-up the system from SLEEP condition, if bit PBIE was set before going to SLEEP. And GIE bit also decides whether or not the processor branches to the interrupt vector following wake-up. If GIE bit was set, the program will execute interrupt service routine after wake-up; or if GIE bit was cleared, the program will execute next PC after wake-up. 2.5 Power-down Mode (SLEEP) Power-down mode is entered by executing a SLEEP instruction. When SLEEP instruction is executed, the PD bit (STATUS<3>) is cleared, the TO bit is set, the watchdog timer will be cleared and keeps running, and the oscillator driver is turned off. All I/O pins maintain the status they had before the SLEEP instruction was executed. 2.5.1 Wake-up from SLEEP Mode The device can wake-up from SLEEP mode through one of the following events: 1. RSTB reset. 2. WDT time-out reset (if enabled). 3. Interrupt from RB0/INT pin, or PORTB change interrupt. External RSTB reset and WDT time-out reset will cause a device reset. The PD and TO bits can be used to determine the cause of device reset. The PD bit is set on power-up and is cleared when SLEEP instruction is executed. The TO bit is cleared if a WDT time-out occurred. For the device to wake-up through an interrupt event, the corresponding interrupt enable bit must be set. Wake-up is regardless of the GIE bit. If GIE bit is cleared, the device will continue execution at the instruction after the SLEEP instruction. If the GIE bit is set, the device will branch to the interrupt address (008h). The system wake-up delay time is 18ms plus 128 oscillator cycle time. 2.6 Reset CP8056 devices may be RESET in one of the following ways: 1. Power-on Reset (POR) 2. Brown-out Reset (BOR) 3. RSTB Pin Reset 4. WDT time-out Reset Some registers are not affected in any RESET condition. Their status is unknown on Power-on Reset and unchanged in any other RESET. Most other registers are reset to a "reset state" on Power-on Reset, RSTB or WDT Reset. A Power-on RESET pulse is generated on-chip when Vdd rise is detected. To use this feature, the user merely ties the RSTB pin to Vdd. On-chip Low Voltage Detector (LVD) places the device into reset when Vdd is below a fixed voltage. This ensures that the device does not continue program execution outside the valid operation Vdd range. Brown-out RESET is typically used in AC line or heavy loads switched applications. A RSTB or WDT Wake-up from SLEEP also results in a device RESET, and not a continuation of operation before SLEEP. The TO and PD bits (STATUS<4:3>) are set or cleared depending on the different reset conditions. 2.6.1 Power-up Reset Timer(PWRT) P.19/CP8056 CHENGPIN 2.6.2 Oscillator Start-up Timer(OST) CP8056 The Power-up Reset Timer provides a nominal 18ms delay after Power-on Reset (POR), Brown-out Reset (BOR), RSTB Reset or WDT time-out Reset. The device is kept in reset state as long as the PWRT is active. The PWDT delay will vary from device to device due to Vdd, temperature, and process variation. The OST timer provides a 128 oscillator cycle delay (from OSCI input) after the PWRT delay (18ms) is over. This delay ensures that the X'tal oscillator or resonator has started and stabilized. The device is kept in reset state as long as the OST is active. This counter only starts incrementing after the amplitude of the OSCI signal reaches the oscillator input thresholds. 2.6.3 Reset Sequence When Power-on Reset (POR), Brown-out Reset (BOR), RSTB Reset or WDT time-out Reset is detected, the reset sequence is as follows: 1. The reset latch is set and the PWRT & OST are cleared. 2. When the internal POR, BOR, RSTB Reset or WDT time-out Reset pulse is finished, then the PWRT begins counting. 3. After the PWRT time-out, the OST is activated. 4. And after the OST delay is over, the reset latch will be cleared and thus end the on-chip reset signal. The totally system reset delay time is 18ms plus 128 oscillator cycle time. FIGURE 2.5: Simplified Block Diagram of on-chip Reset Circuit WDT Module WDT Time-out S Q Reset Latch RSTB Low Voltage BOR Detector (LVD) R Q CHIP RESET Vdd Power-on Reset (POR) POR RESET On-Chip RC OSC RESET Oscillator Start-up Timer (OST) OSCI Power-up Reset Timer (PWRT) P.20/CP8056 CHENGPIN TABLE 2.1: Reset Conditions for All Registers Register ACC OPTION IOSTA IOSTB INDF TMR0 PCL STATUS FSR PORTA PORTB General Purpose Register PCON WUCON PCHBUF PDCON ODCON PHCON INTEN INTFLAG General Purpose Registers Address N/A N/A N/A N/A 00h 01h 02h 03h 04h 05h 06h 07h 08h 09h 0Ah 0Bh 0Ch 0Dh 0Eh 0Fh 10 ~ 3Fh Power-on Reset Brown-out Reset xxxx xxxx -011 1111 ---- 1111 1111 1111 xxxx xxxx xxxx xxxx 1111 1111 0001 1xxx 11xx xxxx ---- xxxx xxxx xxxx xxxx xxxx 1010 ---0000 0000 54: ---- ---0 56: ---- --00 1111 1111 0000 0000 1111 1111 0--- -000 ---- -000 xxxx xxxx CP8056 RSTB Reset WDT Reset uuuu uuuu -011 1111 ---- 1111 1111 1111 uuuu uuuu uuuu uuuu 1111 1111 000# #uuu 11uu uuuu ---- uuuu uuuu uuuu uuuu uuuu 1010 ---0000 0000 54: ---- ---0 56: ---- --00 1111 1111 0000 0000 1111 1111 0--- -000 ---- -000 uuuu uuuu Legend: u = unchanged, x = unknown, - = unimplemented, # = refer to the following table for possible values. TABLE 2.2: TO / PD Status after Reset TO 1 1 u 1 0 0 PD RESET was caused by Power-on Reset Brown-out reset RSTB Reset during normal operation RSTB Reset during SLEEP WDT Reset during normal operation WDT Reset during SLEEP 1 1 u 0 1 0 Legend: u = unchanged TABLE 2.3: Events Affecting TO / PD Status Bits Event Power-on WDT Time-Out SLEEP instruction CLRWDT instruction Legend: u = unchanged TO 1 0 1 1 PD 1 u 0 1 P.21/CP8056 CHENGPIN 2.7 Hexadecimal Convert to Decimal (HCD) CP8056 Decimal format is another number format for CP8056. When the content of the data memory has been assigned as decimal format, it is necessary to convert the results to decimal format after the execution of ALU instructions. When the decimal converting operation is processing, all of the operand data (including the contents of the data memory (RAM), accumulator (ACC), immediate data, and look-up table) should be in the decimal format, or the results of conversion will be incorrect. Instruction DAA can convert the ACC data from hexadecimal to decimal format after any addition operation and restored to ACC. The conversion operation is illustrated in example 2.2. EXAMPLE 2.2: DAA CONVERSION MOVIA 90h ;Set immediate data = decimal format number "90" (ACC 90h) MOVAR 30h ;Load immediate data "90" to data memory address 30H MOVIA 10h ;Set immediate data = decimal format number "10" (ACC 10h) ADDAR 30h, 0 ;Contents of the data memory address 30H and ACC are binary-added ;the result loads to the ACC (ACC A0h, C 0) DAA ;Convert the content of ACC to decimal format, and restored to ACC ;The result in the ACC is "00" and the carry bit C is "1". This represents the ;decimal number "100" Instruction DAS can convert the ACC data from hexadecimal to decimal format after any subtraction operation and restored to ACC. The conversion operation is illustrated in example 2.3. EXAMPLE 2.3: DAS CONVERSION MOVIA 10h ;Set immediate data = decimal format number "10" (ACC 10h) MOVAR 30h ;Load immediate data "10" to data memory address 30H MOVIA 20h ;Set immediate data = decimal format number "20" (ACC 20h) SUBAR 30h, 0 ;Contents of the data memory address 30H and ACC are binary-subtracted ;the result loads to the ACC (ACC F0h, C 0) DAS ;Convert the content of ACC to decimal format, and restored to ACC ;The result in the ACC is "90" and the carry bit C is "0". This represents the ;decimal number " -10" P.22/CP8056 CHENGPIN 2.8 Oscillator Configurations CP8056 CP8056 can be operated in four different oscillator modes. Users can program two configuration bits (Fosc<1:0>) to select the appropriate modes: * LF: Low Frequency Crystal Oscillator * XT: Crystal/Resonator Oscillator * HF: High Frequency Crystal/Resonator Oscillator * RC: Resistor/Capacitor Oscillator In LF, XT, or HF modes, a crystal or ceramic resonator in connected to the OSCI and OSCO pins to establish oscillation. When in LF, XT, or HF modes, the devices can have an external clock source drive the OSCI pin. The RC device option offers additional cost savings for timing insensitive applications. The RC oscillator frequency is a function of the supply voltage, the resistor (Rext) and capacitor (Cext), the operating temperature, and the process parameter. FIGURE 2.6: HF, XT or LF Oscillator Modes (Crystal Operation or Ceramic Resonator) CP8056 C1 X'TAL C2 RS OSCI RF OSCO SLEEP Internal Circuit FIGURE 2.7: HF, XT or LF Oscillator Modes (External Clock Input Operation) CP8056 Clock from External System OSCI Open OSCO FIGURE 2.8: RC Oscillator Mode Rext OSCI Cext OSCO CP8056 Internal Circuit /2, /4, /8 P.23/CP8056 CHENGPIN 2.9 Configurations Word TABLE 2.4: Configurations Word bit Name Description Oscillator Selection Bits = 1, 1 RC mode (default) HF mode Fosc<1:0> = 1, 0 = 0, 1 XT mode = 0, 0 LF mode Watchdog Timer Enable Bit WDTEN = 1, WDT enabled (default) = 0, WDT disabled Code Protection Bit PROTECT = 1, EPROM code protection off (default) = 0, EPROM code protection on Low Voltage Detector Selection Bit = 1, 1 disable (default) LVDT<1:0> = 0, 1 enable, LVDT voltage = 2.0V = 0, 0 enable, LVDT voltage = 3.6V Instruction Period Selection Bits = 1, 1 four oscillator periods (default) OSCD<1:0> = 1, 0 two oscillator periods = 0, 0 eight oscillator periods Power Mode Selection Bits = 1, 1 Power Mode 3, non-power saving (default) Power Mode 2, power saving PMOD<1:0> = 1, 0 = 0, 1 Power Mode 1, power saving = 0, 0 Power Mode 0, power saving Unused CP8056 1, 0 2 3 5, 4 7, 6 9, 8 12, 11, 10 P.24/CP8056 CHENGPIN 3.0 INSTRUCTION SET Mnemonic, Operands BCR BSR BTRSC BTRSS NOP CLRWDT OPTION SLEEP INT DAA CP8056 Description 0 1 R R Operation Cycles 1 1 1/2 1 1 1 1 3 1 (1) Status Affected TO , PD TO , PD C R, bit Clear bit in R R, bit Set bit in R R, bit Test bit in R, Skip if Clear R, bit Test bit in R, Skip if Set No Operation Clear Watchdog Timer Load OPTION register Go into power-down mode S/W interrupt Skip if R = 0 Skip if R = 1 No operation 00h 00h ACC 1/2 (1) WDT, WDT prescaler OPTION 00h WDT, 00h WDT prescaler PC + 1 Top of Stack, 002h PC ACC(dec) DAS RETURN RETFIE CLRA IOST CLRR MOVAR MOVR DECR R R R R, d R, d Adjust ACC's data format from HEX to DEC after any addition ACC(hex) operation Adjust ACC's data format from HEX to DEC after any subtraction ACC(hex) operation Return from subroutine Return from interrupt, set GIE bit Clear ACC Load IOST register Clear R Move ACC to R Move R Decrement R Decrement R, Skip if 0 Increment R Increment R, Skip if 0 Add ACC and R Subtract ACC from R Add ACC and R with Carry Subtract ACC from R with Carry AND ACC with R Inclusive OR ACC with R Exclusive OR ACC with R Complement R Rotate left f through Carry Top of Stack Top of Stack 1 GIE 00h ACC 00h ACC R R-1 ACC ACC(dec) PC PC, 1 2 2 1 1 1 1 1 1 1/2 (1) 1 1/2 (1) 1 1 1 1 1 1 1 1 1 Z Z Z Z Z C, DC, Z C, DC, Z C, DC, Z C, DC, Z Z Z Z Z C IOST register R R dest dest DECRSZ R, d INCR INCRSZ ADDAR SUBAR ADCAR SBCAR ANDAR IORAR XORAR COMR RLR R, d R, d R, d R, d R, d R, d R, d R, d R, d R, d R, d R-1 dest, Skip if result = 0 R+1 dest R+1 dest, Skip if result = 0 R + ACC R - ACC dest dest dest dest dest dest dest R + ACC + C R + ACC + C ACC and R ACC or R R xor ACC R dest R<7> C, R<6:0> dest<7:1>, C dest<0> P.25/CP8056 CHENGPIN RRR SWAPR MOVIA ADDIA SUBIA ANDIA IORIA XORIA RETIA CALL GOTO R, d R, d I I I I I I I I I Rotate right f through Carry Swap R Move Immediate to ACC Add ACC and Immediate Subtract ACC from Immediate AND Immediate with ACC OR Immediate with ACC Exclusive OR Immediate to ACC Return, place Immediate in ACC Call subroutine Unconditional branch C dest<7>, R<7:1> dest<6:0>, R<0> C R<3:0> dest<7:4>, R<7:4> dest<3:0> I ACC ACC ACC ACC ACC ACC I + ACC I - ACC ACC and I ACC or I ACC xor I 1 1 1 1 1 1 1 1 2 2 2 CP8056 C C, DC, Z C, DC, Z Z Z Z - I ACC, Top of Stack PC PC + 1 Top of Stack, I PC<9:0> I PC<9:0> Note: 1. 2 cycles for skip, else 1 cycle 2. bit : Bit address within an 8-bit register R R : Register address (00h to 3Fh) I : Immediate data ACC : Accumulator d : Destination select; =0 (store result in ACC) =1 (store result in file register R) dest : Destination PC : Program Counter PCHBUF : High Byte Buffer of Program Counter WDT : Watchdog Timer Counter GIE : Global interrupt enable bit TO : Time-out bit PD : Power-down bit C : Carry bit DC : Digital carry bit Z : Zero bit P.26/CP8056 CHENGPIN ADCAR Syntax: Operands: Operation: Status Affected: Description: Cycles: ADDAR Syntax: Operands: Operation: Status Affected: Description: Cycles: ADDIA Syntax: Operands: Operation: Status Affected: Description: Cycles: ANDAR Syntax: Operands: Operation: Status Affected: Description: Cycles: ANDIA Syntax: Operands: Operation: Status Affected: Description: Cycles: CP8056 Add ACC and R with Carry ADCAR R, d 0 R 63 d [0,1] R + ACC + C dest C, DC, Z Add the contents of the ACC register and register `R' with Carry. If `d' is 0 the result is stored in the ACC register. If `d' is `1' the result is stored back in register `R'. 1 Add ACC and R ADDAR R, d 0 R 63 d [0,1] ACC + R dest C, DC, Z Add the contents of the ACC register and register `R'. If `d' is 0 the result is stored in the ACC register. If `d' is `1' the result is stored back in register `R'. 1 Add ACC and Immediate ADDIA I 0 I 255 ACC + I ACC C, DC, Z Add the contents of the ACC register with the 8-bit immediate `I'. The result is placed in the ACC register. 1 AND ACC and R ANDAR R, d 0 R 63 d [0,1] ACC and R dest Z The contents of the ACC register are AND'ed with register `R'. If `d' is 0 the result is stored in the ACC register. If `d' is `1' the result is stored back in register `R'. 1 AND Immediate with ACC ANDIA I 0 I 255 ACC AND I ACC Z The contents of the ACC register are AND'ed with the 8-bit immediate `I'. The result is placed in the ACC register. 1 P.27/CP8056 CHENGPIN BCR Syntax: Operands: Operation: Status Affected: Description: Cycles: BSR Syntax: Operands: Operation: Status Affected: Description: Cycles: BTRSC Syntax: Operands: Operation: Status Affected: Description: Clear Bit in R BCF R, b 0 R 63 0b7 0 R None Clear bit `b' in register `R'. 1 Set Bit in R BSR R, b 0 R 63 0b7 1 R None Set bit `b' in register `R'. 1 CP8056 Cycles: BTRSS Syntax: Operands: Operation: Status Affected: Description: Test Bit in R, Skip if Clear BTRSC R, b 0 R 63 0b7 Skip if R = 0 None If bit `b' in register `R' is 0 then the next instruction is skipped. If bit `b' is 0 then next instruction fetched during the current instruction execution is discarded, and a NOP is executed instead making this a 2-cycle instruction.. 1(2) Test Bit in R, Skip if Set BTRSS R, b 0 R 63 0b7 Skip if R = 1 None If bit `b' in register `R' is `1' then the next instruction is skipped. If bit `b' is `1', then the next instruction fetched during the current instruction execution, is discarded and a NOP is executed instead, making this a 2-cycle instruction. 1(2) Subroutine Call CALL I 0 I 1023 PC +1 Top of Stack; I PC<9:0> PCHBUF<2> PC<10> None Subroutine call. First, return address (PC+1) is pushed onto the stack. The 10-bit immediate address is loaded into PC bits <9:0>. CALL is a two-cycle instruction. 2 Cycles: CALL Syntax: Operands: Operation: Status Affected: Description: Cycles: P.28/CP8056 CHENGPIN CLRA Syntax: Operands: Operation: Status Affected: Description: Cycles: CLRR Syntax: Operands: Operation: Status Affected: Description: Cycles: CLRWDT Syntax: Operands: Operation: Clear ACC CLRA None 00h ACC; 1 Z Z The ACC register is cleared. Zero bit (Z) is set. 1 Clear R CLRR R 0 R 63 00h R; 1 Z Z The contents of register `R' are cleared and the Z bit is set. 1 CP8056 Status Affected: Description: Cycles: COMR Syntax: Operands: Operation: Status Affected: Description: Cycles: DAA Syntax: Operands: Operation: Status Affected: Description: Cycles: Clear Watchdog Timer CLRWDT None 00h WDT; 00h WDT prescaler (if assigned); 1 TO ; PD 1 TO , PD The CLRWDT instruction resets the WDT. It also resets the prescaler, if the prescaler is assigned to the WDT and not Timer0. Status bits TO and PD are set. 1 Complement R COMR R, d 0 R 63 d [0,1] R dest Z The contents of register `R' are complemented. If `d' is 0 the result is stored in the ACC register. If `d' is 1 the result is stored back in register `R'. 1 Adjust ACC's data format from HEX to DEC DAA None ACC(hex) C ACC(dec) Convert the ACC data from hexadecimal to decimal format after any addition operation and restored to ACC. 1 P.29/CP8056 CHENGPIN DAS Syntax: Operands: Operation: Status Affected: Description: Cycles: DECR Syntax: Operands: Operation: Status Affected: Description: Cycles: DECRSZ Syntax: Operands: Operation: Status Affected: Description: CP8056 Adjust ACC's data format from HEX to DEC DAS None ACC(hex) ACC(dec) None Convert the ACC data from hexadecimal to decimal format after any subtraction operation and restored to ACC. 1 Decrement R DECR R, d 0 R 63 d [0,1] R-1 dest Z Decrement register `R'. If `d' is 0 the result is stored in the ACC register. If `d' is 1 the result is stored back in register `R'. 1 Decrement R, Skip if 0 DECRSZ R, d 0 R 63 d [0,1] R-1 dest; skip if result =0 None The contents of register `R' are decremented. If `d' is 0 the result is placed in the ACC register. If `d' is 1 the result is placed back in register 'R'. If the result is 0, the next instruction, which is already fetched, is discarded and a NOP is executed instead making it a two-cycle instruction. 1(2) Unconditional Branch GOTO I 0 I 1023 I PC<9:0> PCHBUF<2> PC<10> None GOTO is an unconditional branch. The 10-bit immediate value is loaded into PC bits <9:0>. GOTO is a two-cycle instruction. 2 Increment R INCR R, d 0 R 63 d [0,1] R+1 dest Z The contents of register `R' are incremented. If `d' is 0 the result is placed in the ACC register. If `d' is 1 the result is placed back in register `R'. 1 Cycles: GOTO Syntax: Operands: Operation: Status Affected: Description: Cycles: INCR Syntax: Operands: Operation: Status Affected: Description: Cycles: P.30/CP8056 CHENGPIN INCRSZ Syntax: Operands: Operation: Status Affected: Description: CP8056 Cycles: INT Syntax: Operands: Operation: Status Affected: Description: Cycles: IORAR Syntax: Operands: Operation: Status Affected: Description: Cycles: IORIA Syntax: Operands: Operation: Status Affected: Description: Cycles: IOST Syntax: Operands: Operation: Status Affected: Description: Cycles: Increment R, Skip if 0 INCRSZ R, d 0 R 63 d [0,1] R+1 dest, skip if result = 0 None The contents of register `R' are incremented. If `d' is 0 the result is placed in the ACC register. If `d' is the result is placed back in register `R'. If the result is 0, then the next instruction, which is already fetched, is discarded and a NOP is executed instead making it a two-cycle instruction. 1(2) S/W Interrupt INT None PC + 1 Top of Stack, 002h PC None Interrupt subroutine call. First, return address (PC+1) is pushed onto the stack. The address 002h is loaded into PC bits <9:0>. 3 OR ACC with R IORAR R, d 0 R 63 d [0,1] ACC or R dest Z Inclusive OR the ACC register with register `R'. If `d' is 0 the result is placed in the ACC register. If `d' is 1 the result is placed back in register `R'. 1 OR Immediate with ACC IORIA I 0 I 255 ACC or I ACC Z The contents of the ACC register are OR'ed with the 8-bit immediate `I'. The result is placed in the ACC register. 1 Load IOST Register IOST R R = 5,6 or 7 ACC IOST register R None IOST register `R' (R= 5,6 or7) is loaded with the contents of the ACC register. 1 P.31/CP8056 CHENGPIN MOVAR Syntax: Operands: Operation: Status Affected: Description: Cycles: MOVIA Syntax: Operands: Operation: Status Affected: Description: Cycles: MOVR Syntax: Operands: Operation: Status Affected: Description: Move ACC to R MOVAR R 0 R 63 ACC R None Move data from the ACC register to register `R'. 1 CP8056 Move Immediate to ACC MOVIA I 0 I 255 I ACC None The 8-bit immediate `I' is loaded into the ACC register. The don't cares will assemble as 0s. 1 Move R MOVR R, d 0 R 63 d [0,1] R dest Z The contents of register `R' is moved to destination `d'. If `d' is 0, destination is the ACC register. If `d' is 1, the destination is file register `R'. `d' is 1 is useful to test a file register since status flag Z is affected. 1 No Operation NOP None No operation None No operation. 1 Load OPTION Register OPTION None ACC OPTION None The content of the ACC register is loaded into the OPTION register. 1 Return from Interrupt, Set `GIE' Bit RETFIE None Top of Stack PC None The program counter is loaded from the top of the stack (the return address). The `GIE' bit is set to 1. This is a two-cycle instruction. 2 Cycles: NOP Syntax: Operands: Operation: Status Affected: Description: Cycles: OPTION Syntax: Operands: Operation: Status Affected: Description: Cycles: RETFIE Syntax: Operands: Operation: Status Affected: Description: Cycles: P.32/CP8056 CHENGPIN RETIA Syntax: Operands: Operation: Status Affected: Description: Cycles: RETURN Syntax: Operands: Operation: Status Affected: Description: Cycles: RLR Syntax: Operands: Operation: CP8056 Return with Immediate in ACC RETIA I 0 I 255 I ACC; Top of Stack PC None The ACC register is loaded with the 8-bit immediate `I'. The program counter is loaded from the top of the stack (the return address). This is a two-cycle instruction. 2 Return from Subroutine RETURN None Top of Stack PC None The program counter is loaded from the top of the stack (the return address). This is a two-cycle instruction. 2 Rotate Left f through Carry RLR R, d 0 R 63 d [0,1] R<7> C; R<6:0> dest<7:1>; C dest<0> C The contents of register `R' are rotated one bit to the left through the Carry Flag. If `d' is 0 the result is placed in the ACC register. If `d' is 1 the result is stored back in register `R'. 1 Rotate Right f through Carry RRR R, d 0 R 63 d [0,1] C dest<7>; R<7:1> dest<6:0>; R<0> C C The contents of register `R' are rotated one bit to the right through the Carry Flag. If `d' is 0 the result is placed in the ACC register. If `d' is 1 the result is placed back in register `R'. 1 Status Affected: Description: Cycles: RRR Syntax: Operands: Operation: Status Affected: Description: Cycles: P.33/CP8056 CHENGPIN SLEEP Syntax: Operands: Operation: CP8056 Status Affected: Description: Cycles: SBCAR Syntax: Operands: Operation: Status Affected: Description: Cycles: SUBAR Syntax: Operands: Operation: Status Affected: Description: Cycles: SUBIA Syntax: Operands: Operation: Status Affected: Description: Cycles: SWAPR Syntax: Operands: Operation: Status Affected: Description: Cycles: Enter SLEEP Mode SLEEP None 00h WDT; 00h WDT prescaler; 1 TO ; PD 0 TO , PD Time-out status bit ( TO ) is set. The power-down status bit ( PD ) is cleared. The WDT and its prescaler are cleared. The processor is put into SLEEP mode. 1 Subtract ACC from R with Carry SBCAR R, d 0 R 63 d [0,1] R + ACC + C dest C, DC, Z Add the 2's complement method of the ACC register from register `R' with Carry. If `d' is 0 the result is stored in the ACC register. If `d' is 1 the result is stored back in register `R'. 1 Subtract ACC from R SUBAR R, d 0 R 63 d [0,1] R - ACC dest C, DC, Z Subtract (2's complement method) the ACC register from register `R'. If `d' is 0 the result is stored in the ACC register. If `d' is 1 the result is stored back in register `R'. 1 Subtract ACC from Immediate SUBAR R, d 0 I 255 I - ACC ACC C, DC, Z Subtract (2's complement method) the ACC register from the 8-bit immediate `I'. The result is placed in the ACC register. 1 Swap nibbles in R SWAPR R, d 0 R 63 d [0,1] R<3:0> dest<7:4>; R<7:4> dest<3:0> None The upper and lower nibbles of register `R' are exchanged. If `d' is 0 the result is placed in ACC register. If `d' is 1 the result in placed in register `R'. 1 P.34/CP8056 CHENGPIN XORAR Syntax: Operands: Operation: Status Affected: Description: Cycles: XORIA Syntax: Operands: Operation: Status Affected: Description: Cycles: CP8056 Exclusive OR ACC with R XORAR R, d 0 R 63 d [0,1] ACC xor R dest Z Exclusive OR the contents of the ACC register with register 'R'. If `d' is 0 the result is stored in the ACC register. If `d' is 1 the result is stored back in register `R'. 1 Exclusive OR Immediate with ACC XORIA I 0 I 255 ACC xor I ACC Z The contents of the ACC register are XOR'ed with the 8-bit immediate `I'. The result is placed in the ACC register. 1 P.35/CP8056 CHENGPIN 4.0 ABSOLUTE MAXIMUM RATINGS Ambient Operating Temperature Store Temperature DC Supply Voltage (Vdd) Input Voltage with respect to Ground (Vss) CP8056 0 to +70 -65 to +150 0V to +6.0V -0.3V to (Vdd + 0.3)V 5.0 OPERATING CONDITIONS DC Supply Voltage Operating Temperature +2.3V to +5.5V 0 to +70 P.36/CP8056 CHENGPIN 6.0 ELECTRICAL CHARACTERISTICS 6.1 ELECTRICAL CHARACTERISTICS of CP8056 Under Operating Conditions, at four clock instruction cycles and WDT & LVDT are disabled Sym FHF FXT FLF FRC Description X'tal oscillation range X'tal oscillation range X'tal oscillation range RC oscillation range Conditions HF mode, Vdd=5V HF mode, Vdd=3V XT mode, Vdd=5V XT mode, Vdd=3V LF mode, Vdd=5V LF mode, Vdd=3V RC mode, Vdd=5V RC mode, Vdd=3V I/O ports, Vdd=5V VIH Input high voltage RSTB, T0CKI pins, Vdd=5V I/O ports, Vdd=3V RSTB, T0CKI pins, Vdd=3V I/O ports, Vdd=5V VIL Input low voltage RSTB, T0CKI pins, Vdd=5V I/O ports, Vdd=3V RSTB, T0CKI pins, Vdd=3V VOH VOL IPH IPD IWDT TWDT Output high voltage Output low voltage Pull-high current Pull-down current WDT current IOH=-5.4mA, Vdd=5V IOL=8.7mA, Vdd=5V Input pin at Vss, Vdd=5V Input pin at Vdd, Vdd=5V Vdd=5V Vdd=3V Vdd=3V Vdd=4V Vdd=5V Vdd=5V LVDT = 3.6V Vdd=5V LVDT = 2V Vdd=3V LVDT = 2V Sleep mode, Vdd=5V, WDT enable ISB Power down current Sleep mode, Vdd=5V, WDT disable Sleep mode, Vdd=3V, WDT enable Sleep mode, Vdd=3V, WDT disable HF mode, Vdd=5V, 4 clock instruction 20MHz IDD Operating current 15MHz 10MHz 4MHz 2MHz 2.04 1.68 1.28 0.78 0.62 -45 35 9 2 20.4 17.9 16.2 30 23 6.8 10 2 2.5 1.1 3.6 Min. 1 1 0.5 0.5 32 32 DC DC 2.0 4.0 1.5 2.4 Typ. CP8056 Max. 20 15 10 10 4000 1000 15 7 Unit MHz MHz KHZ MHz V 1.0 1.0 0.6 0.6 V 0.6 V uA uA 12 4 uA V WDT period mS 40 30 8.0 ILVDT LVDT current uA uA mA P.37/CP8056 CHENGPIN HF mode, Vdd=3V, 4 clock instruction 20MHz IDD Operating current 15MHz 10MHz 4MHz 2MHz HF mode, Vdd=5V, 2 clock instruction 20MHz IDD Operating current 15MHz 10MHz 4MHz 2MHz HF mode, Vdd=3V, 2 clock instruction 20MHz IDD Operating current 15MHz 10MHz 4MHz 2MHz XT mode, Vdd=5V, 4 clock instruction 20MHz IDD Operating current 15MHz 10MHz 4MHz 2MHz XT mode, Vdd=3V, 4 clock instruction 20MHz IDD Operating current 15MHz 10MHz 4MHz 2MHz XT mode, Vdd=5V, 2 clock instruction 20MHz IDD Operating current 15MHz 10MHz 4MHz 2MHz XT mode, Vdd=3V, 2 clock instruction 20MHz IDD Operating current 15MHz 10MHz 4MHz 2MHz 1.36 1.05 0.73 0.36 0.23 2.81 2.20 1.60 0.87 0.61 0.78 0.60 0.44 0.24 0.17 1.69 1.36 1.04 0.64 0.49 1.38 1.07 0.77 0.38 0.24 2.94 2.34 1.74 0.96 0.68 0.92 0.72 0.54 0.30 0.19 CP8056 mA mA mA mA mA mA mA P.38/CP8056 CHENGPIN LF mode, Vdd=5V, 4 clock instruction 2MHz IDD Operating current 1MHz 500KHz 100KHz 32KHz LF mode, Vdd=3V, 4 clock instruction 2MHz IDD Operating current 1MHz 500KHz 100KHz 32KHz LF mode, Vdd=5V, 2 clock instruction 2MHz IDD Operating current 1MHz 500KHz 100KHz 32KHz LF mode, Vdd=3V, 2 clock instruction 2MHz IDD Operating current 1MHz 500KHz 100KHz 32KHz RC mode, Vdd=5V, 4 clock instruction R=1Kohm R=3.3Kohm C=3P R=10Kohm R=100Kohm R=300Kohm R=1Kohm R=3.3Kohm C=20P IDD Operating current R=10Kohm R=100Kohm R=300Kohm R=1Kohm R=3.3Kohm C=100P R=10Kohm R=100Kohm R=300Kohm R=1Kohm R=3.3Kohm C=300P R=10Kohm R=100Kohm R=300Kohm F=14.96MHz F=11.06MHz F=5.80MHz F=808KHz F=276KHz F=11.7MHz F=6.35MHz F=2.73MHz F=320KHz F=108KHz F=5.23MHz F=2.05MHz F=748KHz F=80KHz F=26.4KHz F=2.5MHz F=900KHz F=316KHz F=32KHz F=10.67KHz 4.572 1.845 0.761 0.170 0.119 4.226 1.519 0.613 0.147 0.109 3.429 1.163 0.454 0.126 0.100 3.024 1.021 0.403 0.119 0.098 158 100 67 38 29 371 269 194 130 108 105 73 54 33 26 290 208 167 118 101 CP8056 uA uA uA uA mA P.39/CP8056 CHENGPIN RC mode, Vdd=3V, 4 clock instruction R=1Kohm R=3.3Kohm C=3P R=10Kohm R=100Kohm R=300Kohm R=1Kohm R=3.3Kohm C=20P IDD Operating current R=10Kohm R=100Kohm R=300Kohm R=1Kohm R=3.3Kohm C=100P R=10Kohm R=100Kohm R=300Kohm R=1Kohm R=3.3Kohm C=300P R=10Kohm R=100Kohm R=300Kohm R=1Kohm R=3.3Kohm C=3P R=10Kohm R=100Kohm R=300Kohm R=1Kohm R=3.3Kohm C=20P IDD Operating current R=10Kohm R=100Kohm R=300Kohm R=1Kohm R=3.3Kohm C=100P R=10Kohm R=100Kohm R=300Kohm R=1Kohm R=3.3Kohm C=300P R=10Kohm R=100Kohm R=300Kohm IDD Operating current C=3P R=1Kohm F=8.29MHz F=7.2MHz F=4.58MHz F=900KHz F=316KHz F=7MHz F=5.1MHz F=2.71MHz F=374KHz F=128KHz F=4.14MHz F=2.11MHz F=848KHz F=96KHz F=32KHz F=2.36MHz F=972KHz F=360KHz F=38KHz F=12.71KHz F=15.16MHz F=11.27MHz F=5.77MHz F=826KHz F=274KHz F=11.56MHz F=6.12MHz F=2.72MHz F=308KHz F=105KHz F=5.32MHz F=1.99MHz F=722KHz F=77KHz F=25.0KHz F=2.52MHz F=892KHz F=312KHz F=32KHz F=11KHz F=8.306MHz 2.280 0.913 0.396 0.071 0.040 2.214 0.837 0.327 0.058 0.035 2.060 0.688 0.253 0.047 0.030 1.890 0.630 0.226 0.043 0.028 5.435 2.358 986 0.183 0.108 4.835 1.808 0.701 0.138 0.092 3.680 1.234 0.479 0.110 0.081 3.107 1.057 0.398 0.102 CP8056 mA RC mode, Vdd=5V, 2 clock instruction mA 0.077 mA 2.552 RC mode, Vdd=3V, 2 clock instruction P.40/CP8056 CHENGPIN R=3.3Kohm R=10Kohm R=100Kohm R=300Kohm R=1Kohm R=3.3Kohm C=20P R=10Kohm R=100Kohm R=300Kohm R=1Kohm R=3.3Kohm C=100P R=10Kohm R=100Kohm R=300Kohm R=1Kohm R=3.3Kohm C=300P R=10Kohm R=100Kohm R=300Kohm F=7.29MHz F=4.81MHz F=904KHz F=338KHz F=7.08MHz F=5.07MHz F=2.68MHz F=362KHz F=123KHz F=4.11MHz F=2.03MHz F=810KHz F=91KHz F=30KHz F=2.37MHz F=964KHz F=354KHz F=38KHz F=13KHz 1.130 0.518 0.084 0.039 2.445 0.986 0.393 0.061 0.031 2.197 0.745 0.270 0.043 0.025 1.953 0.648 0.231 0.038 0.022 CP8056 6.2 ELECTRICAL CHARACTERISTICS of CP8056 To be defined P.41/CP8056 CHENGPIN 7.0 PACKAGE DIMENSION 7.1 18-PIN PDIP 300mil CP8056 D 15o(4x) E1 0.727 TOP E-PIN INDENT 0.079 BOTTOM E-PIN INDENT 0.118 C A L e B1 B D1 Symbols A A1 A2 B B1 C D D1 E E1 e L Dimension In Millimeters Min 0.13 0.36 1.27 0.20 22.71 0.43 7.62 6.40 3.18 Nom 3.30 0.46 1.52 0.25 22.96 0.56 6.50 2.54 Max 4.57 3.56 0.56 1.78 0.33 23.11 0.69 8.26 6.65 Min 0.005 0.014 0.050 0.008 0.894 0.017 0.300 0.252 0.125 A1 A2 eB E Dimension In Inches Nom 0.130 0.018 0.060 0.010 0.904 0.022 0.256 0.100 Max 0.180 0.140 0.022 0.070 0.013 0.910 0.027 0.325 0.262 - P.42/CP8056 CHENGPIN 7.2 18-PIN SOP 300mil CP8056 Symbols A A1 A2 B C D E e H L Dimension In Millimeters Min 2.36 0.10 0.33 0.18 11.35 7.39 10.01 0.38 0 Nom 2.49 2.31 0.41 0.23 7.49 1.27 10.31 0.81 Max 2.64 0.30 0.51 0.28 11.76 7.59 10.64 1.27 8 Min 0.093 0.04 0.013 0.007 0.447 0.291 0.394 0.015 0 Dimension In Inches Nom 0.098 0.091 0.016 0.009 0.295 0.050 0.406 0.032 Max 0.104 0.012 0.020 0.011 0.463 0.299 0.419 0.050 8 P.43/CP8056 CHENGPIN 7.3 20-PIN SSOP 209mil CP8056 D View " A E1 E b C e A A2 -HA1 GAUGE PLANE SEATING PLANE 0.004max. L View " A L1 o Symbols A A1 A2 b c D E E1 e L L1 o Dimension In Millimeters Min 0.05 1.65 0.22 0.09 6.90 7.40 5.00 0.55 0 o Nom 1.75 7.20 7.80 5.30 0.65 0.75 1.25 4 o Max 2.00 1.85 0.38 0.21 7.50 8.20 5.60 0.95 8o P.44/CP8056 CHENGPIN 7.4 20-PIN TSSOP 173mil CP8056 Symbols A A1 A2 b D D1 E2 E1 E e L1 L S o Dimension In Millimeters Min 0.00 0.80 0.19 6.40 2.20 1.50 4.30 Nom 1.00 6.50 4.40 6.40 BSC 0.65 BSC 1.00 REF 0.45 0.20 0 o Max 1.20 0.15 1.05 0.30 6.60 4.50 0.60 - 0.75 8o P.45/CP8056 CHENGPIN 8.0 ORDERING INFORMATION OTP Type MCU CP8056H CP8056P CP8056S CP8056SS CP8056TS Package Type DICE PDIP SOP SSOP TSSOP Pin Count 18 18 20 20 CP8056 Package Size 300 mil 300 mil 209 mil 173 mil Mask Type MCU CP8056H CP8056P CP8056S CP8056SS CP8056TS Package Type DICE PDIP SOP SSOP TSSOP Pin Count 18 18 20 20 Package Size 300 mil 300 mil 209 mil 173 mil P.46/CP8056 |
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