PIC16LF1902-ESS View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16LF1902-ESS

28-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt XLP Technology

Microchip Technology 

5.12 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)

• MCLR Reset (RMCLR)

• Watchdog Timer Reset (RWDT)

• Stack Underflow Reset (STKUNF)

• Stack Overflow Reset (STKOVF)

PIC16LF1902/3

The PCON register bits are shown in Register 5-2.

REGISTER 5-2: 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

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

STKOVF: Stack Overflow Flag bit

1 = A Stack Overflow occurred

0 = A Stack Overflow has not occurred or set to ‘0’ by firmware

bit 6

STKUNF: Stack Underflow Flag bit

1 = A Stack Underflow occurred

0 = A Stack Underflow has not occurred or set to ‘0’ 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 to ‘1’ by firmware

0 = A Watchdog Timer Reset has occurred (set to ‘0’ in hardware when a Watchdog Timer Reset)

bit 3

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)

bit 2

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)

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)

 2011 Microchip Technology Inc.

Preliminary

DS41455A-page 49

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