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PIC16F630-I/ST 参数 Datasheet PDF下载

PIC16F630-I/ST图片预览
型号: PIC16F630-I/ST
PDF下载: 下载PDF文件 查看货源
内容描述: 14引脚基于闪存的8位CMOS微控制器 [14-Pin FLASH-Based 8-Bit CMOS Microcontrollers]
分类和应用: 闪存微控制器和处理器外围集成电路光电二极管PC时钟
文件页数/大小: 130 页 / 1924 K
品牌: MICROCHIP [ MICROCHIP ]
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PIC16F630/676  
They are not affected by a WDT wake-up, since this is  
viewed as the resumption of normal operation. TO and  
PD bits are set or cleared differently in different RESET  
situations as indicated in Table 9-4. These bits are  
used in software to determine the nature of the RESET.  
See Table 9-7 for a full description of RESET states of  
all registers.  
9.3  
RESET  
The PIC16F630/676 differentiates between various  
kinds of RESET:  
a) Power-on Reset (POR)  
b) WDT Reset during normal operation  
c) WDT Reset during SLEEP  
d) MCLR Reset during normal operation  
e) MCLR Reset during SLEEP  
f) Brown-out Detect (BOD)  
A simplified block diagram of the On-Chip Reset Circuit  
is shown in Figure 9-4.  
The MCLR Reset path has a noise filter to detect and  
ignore small pulses. See Table 12-4 in Electrical  
Specifications Section for pulse width specification.  
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  
• MCLR Reset  
• WDT Reset  
• WDT Reset during SLEEP  
• Brown-out Detect (BOD)  
FIGURE 9-4:  
SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT  
External  
Reset  
MCLR/  
VPP pin  
SLEEP  
WDT  
WDT  
Module  
Time-out  
Reset  
VDD Rise  
Detect  
Power-on Reset  
VDD  
Brown-out  
Detect  
S
R
Q
Q
BODEN  
OST/PWRT  
OST  
10-bit Ripple Counter  
Chip_Reset  
OSC1/  
CLKIN  
pin  
PWRT  
10-bit Ripple Counter  
On-chip(1)  
RC OSC  
Enable PWRT  
Enable OST  
See Table 9-3 for time-out situations.  
Note 1: This is a separate oscillator from the INTOSC/EC oscillator.  
© 2007 Microchip Technology Inc.  
DS40039E-page 57