PIC12F1822 MICROCHIP [Microchip Technology], PIC12F1822 Datasheet - Page 80

• Manufacturer Part Number: PIC12F1822
• Description: 8/14-Pin Flash Microcontrollers with nanoWatt XLP Technology
• Manufacturer: MICROCHIP [Microchip Technology]

PIC12F/LF1822/16F/LF1823
7.10
Upon any Reset, multiple bits in the STATUS and
PCON register are updated to indicate the cause of the
Reset. Table 7-3 and Table 7-4 show the Reset condi-
tions of these registers.
TABLE 7-3:
TABLE 7-4:
DS41413A-page 80
Power-on Reset
MCLR Reset during normal operation
MCLR Reset during Sleep
WDT Reset
WDT Wake-up from Sleep
Brown-out Reset
Interrupt Wake-up from Sleep
RESET Instruction Executed
Stack Overflow Reset (STVREN = 1)
Stack Underflow Reset (STVREN = 1)
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 return address is pushed on
STKOVF STKUNF RMCLR
0
0
0
0
u
u
u
u
u
u
1
u
2: If a Status bit is not implemented, that bit will be read as ‘0’.
Determining the Cause of a Reset
the stack and PC is loaded with the interrupt vector (0004h) after execution of PC + 1.
0
0
0
0
u
u
u
u
u
u
u
1
RESET STATUS BITS AND THEIR SIGNIFICANCE
RESET CONDITION FOR SPECIAL REGISTERS
Condition
1
1
1
1
u
u
u
0
0
u
u
u
RI
1
1
1
1
u
u
u
u
u
0
u
u
POR
0
0
0
u
u
u
u
u
u
u
u
u
Preliminary
BOR
x
x
x
0
u
u
u
u
u
u
u
u
TO
1
0
x
1
0
0
1
u
1
u
u
u
Program
PC + 1
Counter
PC + 1
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
PD
1
x
0
1
u
0
0
u
0
u
u
u
(1)
Power-on Reset
Illegal, TO is set on POR
Illegal, PD is set on POR
Brown-out Reset
WDT Reset
WDT Wake-up from Sleep
Interrupt Wake-up from Sleep
MCLR Reset during normal operation
MCLR Reset during Sleep
RESET Instruction Executed
Stack Overflow Reset (STVREN = 1)
Stack Underflow Reset (STVREN = 1)
(2)
---1 1000
---u uuuu
---1 0uuu
---0 uuuu
---0 0uuu
---1 1uuu
---1 0uuu
---u uuuu
---u uuuu
---u uuuu
Register
STATUS
 2010 Microchip Technology Inc.
Condition
00-- 110x
uu-- 0uuu
uu-- 0uuu
uu-- uuuu
uu-- uuuu
00-- 11u0
uu-- uuuu
uu-- u0uu
1u-- uuuu
u1-- uuuu
Register
PCON