Datasheet

© 2009 Microchip Technology Inc. DS41203E-page 117
PIC16F688
TABLE 11-4: INITIALIZATION CONDITION FOR REGISTERS
Register Address
Power-on
Reset
MCLR
Reset
WDT Reset
Brown-out Reset
(1)
Wake-up from Sleep
through Interrupt
Wake-up from Sleep
through WDT Time-out
W—xxxx xxxx uuuu uuuu uuuu uuuu
INDF 00h/80h/100h/180h xxxx xxxx uuuu uuuu uuuu uuuu
TMR0 01h/101h xxxx xxxx uuuu uuuu uuuu uuuu
PCL 02h/82h/102h/182h 0000 0000 0000 0000 PC + 1
(3)
STATUS 03h/83h/103h/183h 0001 1xxx 000q quuu
(4)
uuuq quuu
(4)
FSR 04h/84h/104h/184h xxxx xxxx uuuu uuuu uuuu uuuu
PORTA 05h/105h --x0 x000 --00 0000 --uu uuuu
PORTC 07h/107h --xx 0000 --00 0000 --uu uuuu
PCLATH 0Ah/8Ah/10Ah/18Ah ---0 0000 ---0 0000 ---u uuuu
INTCON 0Bh/8Bh/10Bh/18Bh 0000 000x 0000 000x uuuu uuuu
(2)
PIR1 0Ch 0000 0000 0000 0000 uuuu uuuu
(2)
TMR1L 0Eh xxxx xxxx uuuu uuuu uuuu uuuu
TMR1H 0Fh xxxx xxxx uuuu uuuu uuuu uuuu
T1CON 10h 0000 0000 uuuu uuuu -uuu uuuu
BAUDCTL 11h 01-0 0-00 01-0 0-00 uu-u u-uu
SPBRGH 12h -000 0000 -000 0000 -uuu uuuu
SPBRG 13h 0000 0000 0000 0000 uuuu uuuu
RCREG 14h 0000 0000 0000 0000 uuuu uuuu
TXREG 15h 0000 0000 0000 0000 uuuu uuuu
TXSTA 16h 0000 0010 0000 0010 uuuu uuuu
RCSTA 17h 000x 000x 000x 000x uuuu uuuu
WDTCON 18h ---0 1000 ---0 1000 ---u uuuu
CMCON0 19h 0000 0000 0000 0000 uuuu uuuu
CMCON1 1Ah ---- --10 ---- --10 ---- --uu
ADRESH 1Eh xxxx xxxx uuuu uuuu uuuu uuuu
ADCON0 1Fh 00-0 0000 00-0 0000 uu-u uuuu
OPTION_REG 81h/181h 1111 1111 1111 1111 uuuu uuuu
TRISA 85h/185h --11 1111 --11 1111 --uu uuuu
TRISC 87h/187h --11 1111 --11 1111 --uu uuuu
PIE1 8Ch 0000 0000 0000 0000 uuuu uuuu
PCON 8Eh --01 --0x --0u --uu
(1,5)
--uu --uu
Legend: u = unchanged, x = unknown, – = unimplemented bit, reads as ‘0’, q = value depends on condition.
Note 1: If V
DD goes too low, Power-on Reset will be activated and registers will be affected differently.
2: One or more bits in INTCON and/or PIR1 will be affected (to cause wake-up).
3: When the wake-up is due to an interrupt and the GIE bit is set, the PC is loaded with the interrupt
vector (0004h).
4: See Table 11-5 for Reset value for specific condition.
5: If Reset was due to brown-out, then bit 0 = 0. All other Resets will cause bit 0 = u.