
PIC16F872
DS30221A-page 102
Preliminary
1999 Microchip Technology Inc.
TABLE 11-6:
INITIALIZATION CONDITIONS FOR ALL REGISTERS
Register
Power-on Reset,
Brown-out Reset
xxxx xxxx
N/A
xxxx xxxx
0000h
0001 1xxx
xxxx xxxx
--0x 0000
xxxx xxxx
xxxx xxxx
---0 0000
0000 000x
r0rr 0000
-r-0 0--r
xxxx xxxx
xxxx xxxx
--00 0000
0000 0000
-000 0000
xxxx xxxx
0000 0000
xxxx xxxx
xxxx xxxx
--00 0000
xxxx xxxx
0000 00-0
1111 1111
--11 1111
1111 1111
1111 1111
r0rr 0000
-r-0 0--r
---- --qq
1111 1111
0000 0000
--00 0000
xxxx xxxx
0--- 0000
0--- 0000
xxxx xxxx
xxxx xxxx
xxxx xxxx
x--- x000
---- ----
MCLR Resets
WDT Reset
uuuu uuuu
N/A
uuuu uuuu
0000h
000q quuu
(3)
uuuu uuuu
--0u 0000
uuuu uuuu
uuuu uuuu
---0 0000
0000 000u
r0rr 0000
-r-0 0--r
uuuu uuuu
uuuu uuuu
--uu uuuu
0000 0000
-000 0000
uuuu uuuu
0000 0000
uuuu uuuu
uuuu uuuu
--00 0000
uuuu uuuu
0000 00-0
1111 1111
--11 1111
1111 1111
1111 1111
r0rr 0000
-r-0 0--r
---- --uu
1111 1111
0000 0000
--00 0000
uuuu uuuu
0--- 0000
0--- 0000
uuuu uuuu
uuuu uuuu
uuuu uuuu
u--- u000
---- ----
Wake-up via WDT or
Interrupt
uuuu uuuu
N/A
uuuu uuuu
PC + 1
(2)
uuuq quuu
(3)
uuuu uuuu
--uu uuuu
uuuu uuuu
uuuu uuuu
---u uuuu
uuuu uuuu
(1)
rurr uuuu
(1)
-r-u u--r
(1)
uuuu uuuu
uuuu uuuu
--uu uuuu
uuuu uuuu
-uuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
--uu uuuu
uuuu uuuu
uuuu uu-u
uuuu uuuu
--uu uuuu
uuuu uuuu
uuuu uuuu
rurr uuuu
-r-u u--r
---- --uu
1111 1111
uuuu uuuu
--uu uuuu
uuuu uuuu
u--- uuuu
u--- uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
u--- uuuu
---- ----
W
INDF
TMR0
PCL
STATUS
FSR
PORTA
PORTB
PORTC
PCLATH
INTCON
PIR1
PIR2
TMR1L
TMR1H
T1CON
TMR2
T2CON
SSPBUF
SSPCON
CCPR1L
CCPR1H
CCP1CON
ADRESH
ADCON0
OPTION_REG
TRISA
TRISB
TRISC
PIE1
PIE2
PCON
PR2
SSPADD
SSPSTAT
ADRESL
ADCON1
EEDATA
EEADR
EEDATH
EEADRH
EECON1
EECON2
Legend:
u
= unchanged,
x
= unknown, r = reserved,
-
= 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 11-5 for reset value for specific condition.