参数资料
型号: PIC16C662T-20I/L
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 20 MHz, RISC MICROCONTROLLER, PQCC44
封装: PLASTIC, LCC-44
文件页数: 56/136页
文件大小: 634K
代理商: PIC16C662T-20I/L
PIC16C64X & PIC16C66X
DS30559A-page 26
Preliminary
1996 Microchip Technology Inc.
4.2.2.6
PCON REGISTER
The PCON register contains ag bits to differentiate
between a Power-on Reset (POR), an external MCLR
reset, WDT reset, Brown-out Reset (BOR), and Parity
Error Reset (PER). The PCON register also contains a
status bit, MPEEN, which reects the value of the
MPEEN bit in Conguration Word. See Table 9-4 for
status of these bits on various resets.
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
cleared,
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
programming the BODEN bit in the
Conguration word).
FIGURE 4-10: PCON REGISTER (ADDRESS 8Eh)
R-U
U-0
R/W-1
R/W-0
R/W-u
MPEEN
—PER
POR
BOR
R= Readable bit
W= Writable bit
U= Unimplemented bit,
read as ‘0’
- n= Value at POR reset
bit7
bit0
bit 7:
MPEEN: Memory Parity Error Circuitry Status bit
Reects the value of Conguration Word bit, MPEEN
bit 6-3:
Unimplemented: Read as '0'
bit 2:
PER: Memory Parity Error Reset Status bit
1 = No error occurred
0 = Program memory fetch parity error occurred
(must be set in software after a Parity Error Reset occurs)
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 Brown-out Reset occurs)
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