p16f877 Microchip Technology Inc., p16f877 Datasheet - Page 127

• Manufacturer Part Number: p16f877
• Description: 28/40-pin 8-bit Cmos Flash Microcontrollers
• Manufacturer: Microchip Technology Inc.

TABLE 12-4:
TABLE 12-5:
Legend: x = don’t care, u = unchanged
Power-on Reset
MCLR Reset during normal operation
MCLR Reset during SLEEP
WDT Reset
WDT Wake-up
Brown-out Reset
Interrupt wake-up from SLEEP
Legend: u = unchanged, x = unknown, - = unimplemented bit, read as '0'
Note 1: When the wake-up is due to an interrupt and the GIE bit is set, the PC is loaded with the interrupt vector
POR
2001 Microchip Technology Inc.
0
0
0
1
1
1
1
1
(0004h).
BOR
x
x
x
0
1
1
1
1
STATUS BITS AND THEIR SIGNIFICANCE
RESET CONDITION FOR SPECIAL REGISTERS
TO
1
0
x
1
0
0
u
1
Condition
PD
1
x
0
1
1
0
u
0
Power-on Reset
Illegal, TO is set on POR
Illegal, PD is set on POR
Brown-out Reset
WDT Reset
WDT Wake-up
MCLR Reset during normal operation
MCLR Reset during SLEEP or interrupt wake-up from SLEEP
Program
PC + 1
Counter
PC + 1
000h
000h
000h
000h
000h
(1)
0001 1xxx
000u uuuu
0001 0uuu
0000 1uuu
uuu0 0uuu
0001 1uuu
uuu1 0uuu
Register
STATUS
PIC16F87X
---- --0x
---- --uu
---- --uu
---- --uu
---- --uu
---- --u0
---- --uu
DS30292C-page 125
Register
PCON