PIC16F819 Datasheet

IC型号：
PIC16F819
PDF描述：
18/20-Pin Enhanced Flash Microcontrollers with nanoWatt Tech...
文件大小：
68.31KB
PDF页数：
176页
芯片厂家：
MICROCHIP

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PIC16F818/819

2.2.2.8

Note:

PCON Register

Interrupt flag bits get set when an interrupt

condition occurs regardless of the state of

its corresponding enable bit or the global

enable bit, GIE (INTCON<7>). User

software should ensure the appropriate

interrupt flag bits are clear prior to

enabling an interrupt.

Note:

BOR is unknown on Power-on Reset. It

must then be set by the user and checked

on subsequent Resets to see if BOR is

clear, indicating a brown-out has occurred.

The BOR status bit is a 鈥榙on't care鈥?and is

not necessarily predictable if the brown-

out circuit is disabled (by clearing the

BOREN bit in the Configuration word).

The Power Control (PCON) register contains a flag bit

to allow differentiation between a Power-on Reset

(POR), a Brown-out Reset, an external MCLR Reset

and WDT Reset.

PCON: POWER CONTROL REGISTER (ADDRESS 8Eh)

U-0

鈥?/div>

bit 7

U-0

鈥?/div>

U-0

鈥?/div>

U-0

鈥?/div>

U-0

鈥?/div>

U-0

鈥?/div>

R/W-0

POR

R/W-x

BOR

bit 0

bit 7-2

bit 1

Unimplemented:

Read as 鈥?鈥?/div>

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)

BOR:

Brown-out Reset Status bit

= No Brown-out Reset occurred

= A Brown-out Reset occurred (must be set in software after a Brown-out Reset occurs)

Legend:

R = Readable bit

- n = Value at POR

W = Writable bit

鈥?鈥?= Bit is set

U = Unimplemented bit, read as 鈥?鈥?/div>

鈥?鈥?= Bit is cleared

x = Bit is unknown

bit 0

DS39598D-page 22

Preliminary

铮?/div>

2003 Microchip Technology Inc.

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