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PIC16(L)F1508/9
DS40001609E-page 68
2011-2015 Microchip Technology Inc.
6.13
Power Control (PCON) Register
The Power Control (PCON) register contains flag bits
to differentiate between a:
• Power-on Reset (POR)
• Brown-out Reset (BOR)
• Reset Instruction Reset (RI)
• MCLR Reset (RMCLR)
• Watchdog Timer Reset (RWDT)
• Stack Underflow Reset (STKUNF)
• Stack Overflow Reset (STKOVF)
The PCON register bits are shown in
6.14
Register Definitions: Power Control
REGISTER 6-2:
PCON: POWER CONTROL REGISTER
R/W/HS-0/q
R/W/HS-0/q
U-0
R/W/HC-1/q R/W/HC-1/q
R/W/HC-1/q
R/W/HC-q/u R/W/HC-q/u
STKOVF
STKUNF
—
RWDT
RMCLR
RI
POR
BOR
bit 7
bit 0
Legend:
HC = Bit is cleared by hardware
HS = Bit is set by hardware
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
q = Value depends on condition
bit 7
STKOVF:
Stack Overflow Flag bit
1
= A Stack Overflow occurred
0
= A Stack Overflow has not occurred or cleared by firmware
bit 6
STKUNF:
Stack Underflow Flag bit
1
= A Stack Underflow occurred
0
= A Stack Underflow has not occurred or cleared by firmware
bit 5
Unimplemented:
Read as ‘
0
’
bit 4
RWDT:
Watchdog Timer Reset Flag bit
1
= A Watchdog Timer Reset has not occurred or set by firmware
0
= A Watchdog Timer Reset has occurred (cleared by hardware)
bit 3
RMCLR:
MCLR Reset Flag bit
1
= A MCLR Reset has not occurred or set by firmware
0
= A MCLR Reset has occurred (cleared by hardware)
bit 2
RI:
RESET
Instruction Flag bit
1
= A
RESET
instruction has not been executed or set by firmware
0
= A
RESET
instruction has been executed (cleared by hardware)
bit 1
POR:
Power-On Reset Status bit
1
= No Power-on Reset occurred
0
= A Power-on Reset occurred (must be set in software after a Power-on Reset occurs)
bit 0
BOR:
Brown-Out Reset Status bit
1
= No Brown-out Reset occurred
0
= A Brown-out Reset occurred (must be set in software after a Power-on Reset or Brown-out Reset
occurs)
Содержание PIC12F1501
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