Datasheet

PIC16F87X
DS30292C-page 126  2001 Microchip Technology Inc.
TABLE 12-6: INITIALIZATION CONDITIONS FOR ALL REGISTERS
Register Devices
Power-on Reset,
Brown-out Reset
MCLR
Resets,
WDT Reset
Wake-up via WDT or
Interrupt
W 873 874 876 877 xxxx xxxx uuuu uuuu uuuu uuuu
INDF 873 874 876 877 N/A N/A N/A
TMR0 873 874 876 877 xxxx xxxx uuuu uuuu uuuu uuuu
PCL 873 874 876 877 0000h 0000h PC + 1
(2)
STATUS 873 874 876 877 0001 1xxx 000q quuu
(3)
uuuq quuu
(3)
FSR 873 874 876 877 xxxx xxxx uuuu uuuu uuuu uuuu
PORTA 873 874 876 877 --0x 0000 --0u 0000 --uu uuuu
PORTB 873 874 876 877 xxxx xxxx uuuu uuuu uuuu uuuu
PORTC 873 874 876 877 xxxx xxxx uuuu uuuu uuuu uuuu
PORTD
873 874 876 877 xxxx xxxx uuuu uuuu uuuu uuuu
PORTE
873 874 876 877 ---- -xxx ---- -uuu ---- -uuu
PCLATH 873 874 876 877 ---0 0000 ---0 0000 ---u uuuu
INTCON 873 874 876 877 0000 000x 0000 000u uuuu uuuu
(1)
PIR1 873 874 876 877 r000 0000 r000 0000 ruuu uuuu
(1)
873 874 876 877 0000 0000 0000 0000 uuuu uuuu
(1)
PIR2 873 874 876 877 -r-0 0--0 -r-0 0--0 -r-u u--u
(1)
TMR1L 873 874 876 877 xxxx xxxx uuuu uuuu uuuu uuuu
TMR1H 873 874 876 877 xxxx xxxx uuuu uuuu uuuu uuuu
T1CON 873 874 876 877 --00 0000 --uu uuuu --uu uuuu
TMR2 873 874 876 877 0000 0000 0000 0000 uuuu uuuu
T2CON 873 874 876 877 -000 0000 -000 0000 -uuu uuuu
SSPBUF 873 874 876 877 xxxx xxxx uuuu uuuu uuuu uuuu
SSPCON 873 874 876 877 0000 0000 0000 0000 uuuu uuuu
CCPR1L 873 874 876 877 xxxx xxxx uuuu uuuu uuuu uuuu
CCPR1H 873 874 876 877 xxxx xxxx uuuu uuuu uuuu uuuu
CCP1CON 873 874 876 877 --00 0000 --00 0000 --uu uuuu
RCSTA 873 874 876 877 0000 000x 0000 000x uuuu uuuu
TXREG 873 874 876 877 0000 0000 0000 0000 uuuu uuuu
RCREG 873 874 876 877 0000 0000 0000 0000 uuuu uuuu
CCPR2L 873 874 876 877 xxxx xxxx uuuu uuuu uuuu uuuu
CCPR2H 873 874 876 877 xxxx xxxx uuuu uuuu uuuu uuuu
CCP2CON 873 874 876 877 0000 0000 0000 0000 uuuu uuuu
ADRESH 873 874 876 877 xxxx xxxx uuuu uuuu uuuu uuuu
ADCON0 873 874 876 877 0000 00-0 0000 00-0 uuuu uu-u
OPTION_REG 873 874 876 877 1111 1111 1111 1111 uuuu uuuu
TRISA 873 874 876 877 --11 1111 --11 1111 --uu uuuu
TRISB 873 874 876 877 1111 1111 1111 1111 uuuu uuuu
TRISC 873 874 876 877 1111 1111 1111 1111 uuuu uuuu
TRISD
873 874 876 877 1111 1111 1111 1111 uuuu uuuu
TRISE 873 874 876 877 0000 -111 0000 -111 uuuu -uuu
PIE1 873
874 876 877 r000 0000 r000 0000 ruuu uuuu
873 874 876 877 0000 0000 0000 0000 uuuu uuuu
Legend: u = unchanged, x = unknown, - = unimplemented bit, read as ’0’, q = value depends on condition,
r = reserved, maintain clear
Note 1: One or more bits in INTCON, PIR1 and/or PIR2 will be affected (to cause wake-up).
2: When the wake-up is due to an interrupt and the GIE bit is set, the PC is loaded with the interrupt vector
(0004h).
3: See Table 12-5 for RESET value for specific condition.