參數(shù)資料
型號: PIC16CR74-I/L
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PQCC44
封裝: PLASTIC, LCC-44
文件頁數(shù): 170/172頁
文件大?。?/td> 2964K
代理商: PIC16CR74-I/L
2007 Microchip Technology Inc.
DS21993C-page 95
PIC16CR7X
12.10 Power Control/Status Register
(PCON)
The Power Control/Status Register, PCON, has two
bits to indicate the type of Reset that last occurred.
Bit 0 is Brown-out Reset Status bit, BOR. Bit BOR is
unknown on a Power-on Reset. It must then be set by
the user and checked on subsequent Resets to see if
bit BOR cleared, indicating a Brown-out Reset
occurred. When the Brown-out Reset is disabled, the
state of the BOR bit is unpredictable.
Bit 1 is POR (Power-on Reset Status bit). It is cleared
on a Power-on Reset and unaffected otherwise. The
user must set this bit following a Power-on Reset.
TABLE 12-3:
TIME-OUT IN VARIOUS SITUATIONS
TABLE 12-4:
STATUS BITS AND THEIR SIGNIFICANCE
TABLE 12-5:
RESET CONDITION FOR SPECIAL REGISTERS
Oscillator Configuration
Power-up
Brown-out
Wake-up from
Sleep
PWRTE = 0
PWRTE = 1
XT, HS, LP
72 ms + 1024 TOSC
1024 TOSC
72 ms + 1024 TOSC
1024 TOSC
RC
72 ms
72 ms
POR
(PCON<1>)
BOR
(PCON<0>)
TO
(STATUS<4>)
PD
(STATUS<3>)
Significance
0x
1
Power-on Reset
0x
0
x
Illegal, TO is set on POR
0x
x
0
Illegal, PD is set on POR
10
1
Brown-out Reset
11
0
1
WDT Reset
11
0
WDT Wake-up
11
u
MCLR Reset during normal operation
11
1
0
MCLR Reset during Sleep or interrupt wake-up from
Sleep
Condition
Program
Counter
STATUS
Register
PCON
Register
Power-on Reset
000h
0001 1xxx
---- --0x
MCLR Reset during normal operation
000h
000u uuuu
---- --uu
MCLR Reset during Sleep
000h
0001 0uuu
---- --uu
WDT Reset
000h
0000 1uuu
---- --uu
WDT Wake-up
PC + 1
uuu0 0uuu
---- --uu
Brown-out Reset
000h
0001 1uuu
---- --u0
Interrupt wake-up from Sleep
PC + 1(1)
uuu1 0uuu
---- --uu
Legend: u = unchanged, x = unknown, - = unimplemented bit, read as ‘0’
Note 1:
When the wake-up is due to an interrupt and the GIE bit is set, the PC is loaded with the interrupt vector
(0004h).
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