參數(shù)資料
型號: 16F871
廠商: Microchip Technology Inc.
英文描述: CAT 5E CROSSOVER PATCH CORD CABLE GREEN 6 FT
中文描述: 28/40-Pin 8位CMOS閃存微控制器
文件頁數(shù): 93/156頁
文件大?。?/td> 2816K
代理商: 16F871
1999 Microchip Technology Inc.
Preliminary
DS30569A-page 93
PIC16F870/871
11.3
Reset
The PIC16F870/871 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 11-4. These bits are used in software to deter-
mine the nature of the reset. See Table 11-6 for a full
description of reset states of all registers.
A simplified block diagram of the on-chip reset circuit is
shown in Figure 11-4.
These devices have a MCLR noise filter in the MCLR
reset path. The filter will detect and ignore small pulses.
It should be noted that a WDT Reset
does not drive
MCLR pin low.
FIGURE 11-4: 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)
相關(guān)PDF資料
PDF描述
16F872 CAT 5E CROSSOVER PATCH CORD CABLE GREEN 10 FT
16F876A 28/40-pin Enhanced FLASH Microcontrollers
16F876 CAT 5E CROSSOVER, GREEN 15 FT PATCH CABLE
16F877 CAT 5E CROSSOVER PATCH CORD CABLE GREEN 20 FT
16FL100S02 6A, 12A AND 16A FAST RECOVERY RECTIFIERS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
16F872 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:28-Pin, 8-Bit CMOS FLASH Microcontroller
16F876 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:28/40-pin 8-Bit CMOS FLASH Microcontrollers
16F876A 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:28/40-pin Enhanced FLASH Microcontrollers
16F877 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:28/40-pin 8-Bit CMOS FLASH Microcontrollers
16F9040 制造商:未知廠家 制造商全稱:未知廠家 功能描述:COMPACT DIGITALMULTIMETER TRUE RMS