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PIC16F628-20/SS датащи(PDF) 24 Page - Microchip Technology

номер детали PIC16F628-20/SS
подробное описание детали  FLASH-Based 8-Bit CMOS Microcontrollers
PDF  160 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC16F628-20/SS датащи(HTML) 24 Page - Microchip Technology

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PIC16F62X
DS40300B-page 24
Preliminary
© 1999 Microchip Technology Inc.
4.2.2.6
PCON REGISTER
The PCON register contains flag bits to differentiate
between a Power-on Reset, an external MCLR reset,
WDT reset or a Brown-out Detect.
Note: BOD is unknown on Power-on Reset. It
must then be set by the user and checked
on subsequent resets to see if BOD is
cleared,
indicating
a
brown-out
has
occurred. The BOD status bit is a "don’t
care" and is not necessarily predictable if
the
brown-out
circuit
is
disabled
(by
programming
BOREN
bit
in
the
Configuration word).
REGISTER 4-6:
PCON REGISTER (ADDRESS 8Eh)
U-0
U-0
U-0
U-0
R/W-1
U-0
R/W-q
R/W-q
—
—
—
—
OSCF
—POR
BOD
R = Readable bit
W = Writable bit
U = Unimplemented bit, read
as ’0’
-n = Value at POR reset
bit7
bit0
bit 7-4,2: Unimplemented: Read as '0'
bit 3:
OSCF: INTRC/ER oscillator speed
1
= 4 MHz typical(1)
0
= 37 KHz typical
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:
BOD: Brown-out Detect 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: When in ER oscillator mode, setting OSCF = 1 will cause the oscillator speed to change to the speed
specified by the external resistor.



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