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PIC16F688-I/ST 参数 Datasheet PDF下载

PIC16F688-I/ST图片预览
型号: PIC16F688-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微控制器采用纳瓦技术 [14-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology]
分类和应用: 闪存微控制器
文件页数/大小: 202 页 / 3832 K
品牌: MICROCHIP [ MICROCHIP ]
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PIC16F688  
When the OSCTUNE register is modified, the  
HFINTOSC frequency will begin shifting to the new  
frequency. Code execution continues during this shift.  
There is no indication that the shift has occurred.  
3.5.2.1  
OSCTUNE Register  
The HFINTOSC is factory calibrated but can be  
adjusted in software by writing to the OSCTUNE  
register (Register 3-2).  
OSCTUNE does not affect the LFINTOSC frequency.  
Operation of features that depend on the LFINTOSC  
clock source frequency, such as the Power-up Timer  
(PWRT), Watchdog Timer (WDT), Fail-Safe Clock  
Monitor (FSCM) and peripherals, are not affected by the  
change in frequency.  
The default value of the OSCTUNE register is ‘0’. The  
value is a 5-bit two’s complement number.  
REGISTER 3-2:  
OSCTUNE: OSCILLATOR TUNING REGISTER  
U-0  
U-0  
U-0  
R/W-0  
TUN4  
R/W-0  
TUN3  
R/W-0  
TUN2  
R/W-0  
TUN1  
R/W-0  
TUN0  
bit 7  
bit 0  
Legend:  
R = Readable bit  
-n = Value at POR  
W = Writable bit  
‘1’ = Bit is set  
U = Unimplemented bit, read as ‘0’  
‘0’ = Bit is cleared x = Bit is unknown  
bit 7-5  
bit 4-0  
Unimplemented: Read as ‘0’  
TUN<4:0>: Frequency Tuning bits  
01111= Maximum frequency  
01110=  
00001=  
00000= Oscillator module is running at the calibrated frequency.  
11111=  
10000= Minimum frequency  
DS41203D-page 26  
© 2007 Microchip Technology Inc.  
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