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PIC16C72 датащи(PDF) 39 Page - Microchip Technology

номер детали PIC16C72
подробное описание детали  8-Bit CMOS Microcontrollers with A/D Converter
PDF  288 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
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PIC16C72 датащи(HTML) 39 Page - Microchip Technology

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© 1997 Microchip Technology Inc.
DS30390E-page 39
PIC16C7X
4.2.2.8
PCON REGISTER
The Power Control (PCON) register contains a flag bit
to allow differentiation between a Power-on Reset
(POR) to an external MCLR Reset or WDT Reset.
Those devices with brown-out detection circuitry con-
tain an additional bit to differentiate a Brown-out Reset
condition from a Power-on Reset condition.
Applicable Devices
72 73 73A 74 74A 76 77
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 don't care and is
not necessarily predictable if the brown-out
circuit is disabled (by clearing the BODEN
bit in the Configuration word).
FIGURE 4-16: PCON REGISTER (ADDRESS 8Eh)
U-0
U-0
U-0
U-0
U-0
U-0
R/W-0
R/W-q
—
—
—
—
—
—
POR
BOR(1)
R
= Readable bit
W = Writable bit
U
= Unimplemented bit,
read as ‘0’
- n = Value at POR reset
bit7
bit0
bit 7-2:
Unimplemented: Read as '0'
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(1): Brown-out Reset Status bit
1 = No Brown-out Reset occurred
0 = A Brown-out Reset occurred (must be set in software after a Brown-out Reset occurs)
Note 1: Brown-out Reset is not implemented on the PIC16C73/74.



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