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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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PIC16F877ATI/P Arkusz danych(PDF) 21 Page - Microchip Technology |
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PIC16F877ATI/P Arkusz danych(HTML) 21 Page - Microchip Technology |
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21 / 234 page  2003 Microchip Technology Inc. DS39582B-page 19 PIC16F87XA 2.2.2 SPECIAL FUNCTION REGISTERS The Special Function Registers are registers used by the CPU and peripheral modules for controlling the desired operation of the device. These registers are implemented as static RAM. A list of these registers is given in Table 2-1. The Special Function Registers can be classified into two sets: core (CPU) and peripheral. Those registers associated with the core functions are described in detail in this section. Those related to the operation of the peripheral features are described in detail in the peripheral features section. TABLE 2-1: SPECIAL FUNCTION REGISTER SUMMARY Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on: POR, BOR Details on page: Bank 0 00h(3) INDF Addressing this location uses contents of FSR to address data memory (not a physical register) 0000 0000 31, 150 01h TMR0 Timer0 Module Register xxxx xxxx 55, 150 02h(3) PCL Program Counter (PC) Least Significant Byte 0000 0000 30, 150 03h(3) STATUS IRP RP1 RP0 TO PD ZDC C 0001 1xxx 22, 150 04h(3) FSR Indirect Data Memory Address Pointer xxxx xxxx 31, 150 05h PORTA — — PORTA Data Latch when written: PORTA pins when read --0x 0000 43, 150 06h PORTB PORTB Data Latch when written: PORTB pins when read xxxx xxxx 45, 150 07h PORTC PORTC Data Latch when written: PORTC pins when read xxxx xxxx 47, 150 08h(4) PORTD PORTD Data Latch when written: PORTD pins when read xxxx xxxx 48, 150 09h(4) PORTE — — — — — RE2 RE1 RE0 ---- -xxx 49, 150 0Ah(1,3) PCLATH — — — Write Buffer for the upper 5 bits of the Program Counter ---0 0000 30, 150 0Bh(3) INTCON GIE PEIE TMR0IE INTE RBIE TMR0IF INTF RBIF 0000 000x 24, 150 0Ch PIR1 PSPIF(3) ADIF RCIF TXIF SSPIF CCP1IF TMR2IF TMR1IF 0000 0000 26, 150 0Dh PIR2 —CMIF —EEIF BCLIF — —CCP2IF -0-0 0--0 28, 150 0Eh TMR1L Holding Register for the Least Significant Byte of the 16-bit TMR1 Register xxxx xxxx 60, 150 0Fh TMR1H Holding Register for the Most Significant Byte of the 16-bit TMR1 Register xxxx xxxx 60, 150 10h T1CON — — T1CKPS1 T1CKPS0 T1OSCEN T1SYNC TMR1CS TMR1ON --00 0000 57, 150 11h TMR2 Timer2 Module Register 0000 0000 62, 150 12h T2CON — TOUTPS3 TOUTPS2 TOUTPS1 TOUTPS0 TMR2ON T2CKPS1 T2CKPS0 -000 0000 61, 150 13h SSPBUF Synchronous Serial Port Receive Buffer/Transmit Register xxxx xxxx 79, 150 14h SSPCON WCOL SSPOV SSPEN CKP SSPM3 SSPM2 SSPM1 SSPM0 0000 0000 82, 82, 150 15h CCPR1L Capture/Compare/PWM Register 1 (LSB) xxxx xxxx 63, 150 16h CCPR1H Capture/Compare/PWM Register 1 (MSB) xxxx xxxx 63, 150 17h CCP1CON — — CCP1X CCP1Y CCP1M3 CCP1M2 CCP1M1 CCP1M0 --00 0000 64, 150 18h RCSTA SPEN RX9 SREN CREN ADDEN FERR OERR RX9D 0000 000x 112, 150 19h TXREG USART Transmit Data Register 0000 0000 118, 150 1Ah RCREG USART Receive Data Register 0000 0000 118, 150 1Bh CCPR2L Capture/Compare/PWM Register 2 (LSB) xxxx xxxx 63, 150 1Ch CCPR2H Capture/Compare/PWM Register 2 (MSB) xxxx xxxx 63, 150 1Dh CCP2CON — — CCP2X CCP2Y CCP2M3 CCP2M2 CCP2M1 CCP2M0 --00 0000 64, 150 1Eh ADRESH A/D Result Register High Byte xxxx xxxx 133, 150 1Fh ADCON0 ADCS1 ADCS0 CHS2 CHS1 CHS0 GO/DONE —ADON 0000 00-0 127, 150 Legend: x = unknown, u = unchanged, q = value depends on condition, - = unimplemented, read as ‘0’, r = reserved. Shaded locations are unimplemented, read as ‘0’. Note 1: The upper byte of the program counter is not directly accessible. PCLATH is a holding register for the PC<12:8>, whose contents are transferred to the upper byte of the program counter. 2: Bits PSPIE and PSPIF are reserved on PIC16F873A/876A devices; always maintain these bits clear. 3: These registers can be addressed from any bank. 4: PORTD, PORTE, TRISD and TRISE are not implemented on PIC16F873A/876A devices, read as ‘0’. 5: Bit 4 of EEADRH implemented only on the PIC16F876A/877A devices. |
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