16F1827 datasheet(79/406 Pages) MICROCHIP

79 / 406 page

 2011 Microchip Technology Inc.

DS41391D-page 79

PIC16(L)F1826/27

7.11

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)

• Stack Underflow Reset (STKUNF)

• Stack Overflow Reset (STKOVF)

The PCON register bits are shown in Register 7-2.

PCON: POWER CONTROL REGISTER

R/W/HS-0/q

U-0

R/W/HC-1/q

R/W/HC-q/u R/W/HC-q/u

STKOVF

STKUNF

—

RMCLR

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

-m/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

= A Stack Overflow occurred

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

bit 6

STKUNF:

Stack Underflow Flag bit

= A Stack Underflow occurred

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

bit 5-4

Unimplemented:

Read as ‘0’

bit 3

RMCLR:

MCLR Reset Flag bit

= A MCLR Reset has not occurred or set to ‘1’ by firmware

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

bit 2

RI: RESET

Instruction Flag bit

= A RESET instruction has not been executed or set to ‘1’ by firmware

= A RESET instruction has been executed (set to ‘0’ in hardware upon executing a RESET instruction)

bit 1

POR:

Power-on Reset Status bit

= No Power-on Reset occurred

= A Power-on Reset occurred (must be set in software after a Power-on Reset occurs)

bit 0

BOR:

Brown-out Reset Status bit

= No Brown-out Reset occurred

= A Brown-out Reset occurred (must be set in software after a Power-on Reset or Brown-out Reset

occurs)

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