2009 Microchip Technology Inc.
DS40044G-page 105
PIC16F627A/628A/648A
TABLE 14-5:
SUMMARY OF REGISTERS ASSOCIATED WITH BROWN-OUT RESET
TABLE 14-6:
INITIALIZATION CONDITION FOR SPECIAL REGISTERS
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR Reset
Value on all
other
Resets(1)
03h, 83h,
103h, 183h
STATUS
IRP
RP1
RPO
TO
PD
Z
DC
C
0001 1xxx
000q quuu
8Eh
PCON
OSCF
—POR
BOR
---- 1-0x
---- u-uq
Legend:
x
= unknown, u = unchanged, - = unimplemented read as ‘0’, q = value depends upon condition.
Shaded cells are not used by Brown-out Reset.
Note
1:
Other (non Power-up) Resets include MCLR Reset, Brown-out Reset and Watchdog Timer Reset during normal operation.
Condition
Program
Counter
Status
Register
PCON
Register
Power-on Reset
000h
0001 1xxx
---- 1-0x
MCLR Reset during normal operation
000h
000u uuuu
---- 1-uu
MCLR Reset during Sleep
000h
0001 0uuu
---- 1-uu
WDT Reset
000h
0000 uuuu
---- 1-uu
WDT Wake-up
PC + 1
uuu0 0uuu
---- u-uu
Brown-out Reset
000h
000x xuuu
---- 1-u0
Interrupt Wake-up from Sleep
PC + 1(1)
uuu1 0uuu
---- u-uu
Legend:
u
= unchanged, x = unknown, - = unimplemented bit, reads as ‘0’.
Note
1:
When the wake-up is due to an interrupt and global enable bit, GIE is set, the PC is loaded with the interrupt vector
(0004h) after execution of PC + 1.
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