PIC16F1938_13 Datasheet, PDF (83/488 Pages) Microchip Technology – 28/40/44-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver

PIC16(L)F1938/9
6.12 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)
• Stack Overflow Reset (STKOVF)
• Stack Underflow Reset (STKUNF)
• MCLR Reset (RMCLR)
The PCON register bits are shown in Register 6-2.
6.13 Register Definitions: Power Control (PCON)
REGISTER 6-2: PCON: POWER CONTROL REGISTER
R/W/HS-0/q R/W/HS-0/q
U-0
STKOVF
STKUNF
—
bit 7
U-0
R/W/HC-1/q R/W/HC-1/q R/W/HC-q/u R/W/HC-q/u
—
RMCLR
RI
POR
BOR
bit 0
Legend:
HC = Bit is cleared by hardware
R = Readable bit
W = Writable bit
u = Bit is unchanged
x = Bit is unknown
‘1’ = Bit is set
‘0’ = Bit is cleared
HS = Bit is set by hardware
U = Unimplemented bit, read as ‘0’
-m/n = Value at POR and BOR/Value at all other Resets
q = Value depends on condition
bit 7
bit 6
bit 5-4
bit 3
bit 2
bit 1
bit 0
STKOVF: Stack Overflow Flag bit
1 = A Stack Overflow occurred
0 = A Stack Overflow has not occurred or set to ‘0’ by firmware
STKUNF: Stack Underflow Flag bit
1 = A Stack Underflow occurred
0 = A Stack Underflow has not occurred or set to ‘0’ by firmware
Unimplemented: Read as ‘0’
RMCLR: MCLR Reset Flag bit
1 = A MCLR Reset has not occurred or set to ‘1’ by firmware
0 = A MCLR Reset has occurred (set to ‘0’ in hardware when a MCLR Reset occurs)
RI: RESET Instruction Flag bit
1 = A RESET instruction has not been executed or set to ‘1’ by firmware
0 = A RESET instruction has been executed (set to ‘0’ in hardware upon executing a RESET instruction)
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)
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)
 2011-2013 Microchip Technology Inc.
DS40001574C-page 83