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PIC12F629/675
“Wide variety”
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8-84 pin
RISC core, 12/14/16bit program word
USART/AUSART, I2C, ADC, ICSP, ICD
OTP/UV EPROM/FLASH/ROM
Families: PIC12, PIC16, PIC17, PIC18
Highlights
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14bit program word
1792Bytes (1024k words) FLASH program memory (105 e/w)
64Bytes 8-bit RAM
128Bytes 8-bit EEPROM (106 erase/write cycle)
6 I/O Pins, 24mA/pin
10bit A/D Convertor (12F675 only)
Comparator
1x8b, 1x16b, 1xWDT timers
DC-20MHz clock or internal 4MHz oscillator
ICD
Single-cycle instructions (branches 2)
8-level stack
Direct, indirect, relative addressing
SLEEP mode
CMOS design (low power (< 1.0 mA @ 5.5V, 4.0 MHz), high speed, static)
Blokové schema
Registers
• 2 banks, switch via STATUS<5>
• Special Function Regs
– 00h-1Fh
– Core
– Peripheral
• General Purpose Regs
– 20h-5Fh / A0-DFh
– Mapped bank1bank0
Core registers
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STATUS
OPTION_REG
INTCON
PIE1
PIR1
PCON
OSCCAL
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PCL
PCLATH
INDF
FSR
Peripherals
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GPIO GPIO, TRISIO, WPU, IOCB
TIMER0 8bit
TIMER1 16bit, timer/async.counter/sync.counter
COMPARATOR internal reference, output
A/D 4x10bit multiplexed, available during SLEEP  bias reduce
EEPROM 128B, auto erase-before-write
Features I
• Configuration word
• Oscilator DC-20MHz
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LP,XT,HS
RC (CLKOUT/IO)
INTOSC (CLKOUT/IO) 4MHz
EC
• Reset
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MCLR Master Clear
POR Power-on Reset
PWRT Power-up Timer 72ms
OST Oscillator Start-up Timer 1024c after PWRT
BOD Brown-out Detect
Features II
• Interrupts (nothing except PC is saved!)
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External GP2/INT
TMR0 Overflow
GPIO Change
Comparator
A/D
TMR1 Overflow
EEPROM Data Write
Features III
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Watchdog Timer
SLEEP
Code Protection
ID Location 2000h-2003h
• IN CIRCUIT SERIAL PROGRAMMING
Features IV
• Power
– <=4MHz
• 2.0-5.5V (A/D off, -40°C-85°C)
• 2.2-5.5V (A/D on, 0°C-85°C)
• 2.5-5.5V (A/D on, -40°C-85°C)
– 4-10MHz
• 3.0-5.5V (0°C-85°C)
– >10MHz
• 4.5-5.5V (-40°C-125°C)
ICSP
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GP0 Data I/O
GP1 CLK
GP3 Programming voltage
Vss Ground
Vdd Power
Instruction set
• Orthogonal
• 14bit word
• 35 instructions
– Byte-oriented 6+1+7b
– Bit-oriented 4+3+7b
– Literal and control 6+8b or 3+11b (CALL, GOTO)
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f … registr 00h-7Fh
d … destination 0=W, 1=f
b … bit address 0-7
k … literal
Flags C,DC,Z
Byte-oriented
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ADDWF f,d
ANDWF f,d
CLRF f
CLRW
COMF f,d
DECF f,d
DECFSZ f,d
INCF
INCFSZ f,d
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IORWF f,d
MOVF f,d
MOVWF f
NOP
RLF f,d
RRF f,d
SUBWF f,d
SWAPF f,d
XORWF f,d
Bit-oriented
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BCF f,b
BSF f,b
BTFSC f,b
BTFSS f,b
Literal and Control
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ADDLW k
ANDLW k
CLRWDT
IORLW k
MOVLW k
SUBLW k
XORLW k
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CALL k
GOTO k
RETFIE
RETLW k
RETURN
SLEEP