PIC16F688
TABLE 11-4: INITIALIZATION CONDITION FOR REGISTERS
Wake-up from Sleep
through Interrupt
Wake-up from Sleep
through WDT Time-out
MCLR Reset
Power-on
Reset
Register
Address
WDT Reset
Brown-out Reset(1)
W
—
xxxx xxxx
xxxx xxxx
xxxx xxxx
0000 0000
0001 1xxx
xxxx xxxx
--x0 x000
--xx 0000
---0 0000
0000 000x
0000 0000
xxxx xxxx
xxxx xxxx
0000 0000
01-0 0-00
-000 0000
0000 0000
0000 0000
0000 0000
0000 0010
000x 000x
---0 1000
0000 0000
---- --10
xxxx xxxx
00-0 0000
1111 1111
--11 1111
--11 1111
0000 0000
--01 --0x
uuuu uuuu
uuuu uuuu
uuuu uuuu
0000 0000
000q quuu(4)
uuuu uuuu
--00 0000
--00 0000
---0 0000
0000 000x
0000 0000
uuuu uuuu
uuuu uuuu
uuuu uuuu
01-0 0-00
-000 0000
0000 0000
0000 0000
0000 0000
0000 0010
000x 000x
---0 1000
0000 0000
---- --10
uuuu uuuu
00-0 0000
1111 1111
--11 1111
--11 1111
0000 0000
--0u --uu(1,5)
uuuu uuuu
uuuu uuuu
uuuu uuuu
PC + 1(3)
INDF
00h/80h/100h/180h
TMR0
01h/101h
PCL
02h/82h/102h/182h
STATUS
FSR
03h/83h/103h/183h
uuuq quuu(4)
uuuu uuuu
--uu uuuu
--uu uuuu
---u uuuu
uuuu uuuu(2)
uuuu uuuu(2)
uuuu uuuu
uuuu uuuu
-uuu uuuu
uu-u u-uu
-uuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
---u uuuu
uuuu uuuu
---- --uu
uuuu uuuu
uu-u uuuu
uuuu uuuu
--uu uuuu
--uu uuuu
uuuu uuuu
--uu --uu
04h/84h/104h/184h
PORTA
PORTC
PCLATH
INTCON
PIR1
05h/105h
07h/107h
0Ah/8Ah/10Ah/18Ah
0Bh/8Bh/10Bh/18Bh
0Ch
0Eh
TMR1L
TMR1H
T1CON
BAUDCTL
SPBRGH
SPBRG
RCREG
TXREG
TXSTA
0Fh
10h
11h
12h
13h
14h
15h
16h
RCSTA
WDTCON
CMCON0
CMCON1
ADRESH
ADCON0
OPTION_REG
TRISA
17h
18h
19h
1Ah
1Eh
1Fh
81h/181h
85h/185h
87h/187h
8Ch
TRISC
PIE1
PCON
8Eh
Legend: u= unchanged, x= unknown, – = unimplemented bit, reads as ‘0’, q= value depends on condition.
Note 1: If VDD 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.
© 2007 Microchip Technology Inc.
DS41203D-page 117
MICROCHIP [ MICROCHIP ]
