參數(shù)資料
型號： PIC16CR7X
廠商： Microchip Technology Inc.
英文描述： 28/40-Pin, 8-Bit CMOS ROM Microcontrollers
中文描述： 28/40-Pin，8位微控制器的CMOS光盤
文件頁數(shù)： 95/172頁
文件大?。?/td> 1506K
代理商： PIC16CR7X
2007 Microchip Technology Inc.
DS21993C-page 93
PIC16CR7X
12.3
Reset
The PIC16CR7X differentiates between various kinds
of Reset:
Power-on Reset (POR)
MCLR Reset during normal operation
MCLR Reset during Sleep
WDT Reset (during normal operation)
WDT Wake-up (during Sleep)
Brown-out Reset (BOR)
Some registers are not affected in any Reset condition.
Their status is unknown on POR and unchanged in any
other Reset. Most other registers are reset to a “Reset
state” on Power-on Reset (POR), on the MCLR and
WDT Reset, on MCLR Reset during Sleep, and Brown-
out Reset (BOR). They are not affected by a WDT
Wake-up, which is viewed as the resumption of normal
operation. The TO and PD bits are set or cleared differ-
ently in different Reset situations, as indicated in
Table 12-4. These bits are used in software to
determine the nature of the Reset. See Table 12-6 for
a full description of Reset states of all registers.
A simplified block diagram of the on-chip Reset circuit
is shown in Figure 12-4.
FIGURE 12-4:
SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT
S
R
Q
External
Reset
MCLR
V
DD
OSC1
WDT
Module
V
DD
Rise
Detect
OST/PWRT
On-chip
RC OSC
WDT
Time-out
Reset
Power-on Reset
OST
10-bit Ripple Counter
PWRT
Chip_Reset
10-bit Ripple Counter
Enable OST
Enable PWRT
Sleep
Note
1:
This is a separate oscillator from the RC oscillator of the CLKIN pin.
Brown-out
Reset
BODEN
(1)
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