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MC81F4432Q 参数 Datasheet PDF下载

MC81F4432Q图片预览
型号: MC81F4432Q
PDF下载: 下载PDF文件 查看货源
内容描述: ABOV半导体的8位单芯片微控制器产品 [ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS]
分类和应用: 半导体微控制器
文件页数/大小: 198 页 / 4293 K
品牌: FINECHIPS [ FINECHIPS ]
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MC81F4432  
17.1 Registers  
WTSCR  
WATCH TIMER STATUS AND CONTROL REGISTER  
00F0H  
7
6
5
4
3
2
1
0
WTEN  
WTSS  
WTCS  
WTSCR  
Reset value: 00H  
R/W  
R/W  
R/W  
R/W  
R/W  
A reset clears WTSCR register to „00H‟. This disables the watch timer. So, if you want to use the  
watch timer, you must write appropriate value to WTSCR register.  
When the watch timer interrupt sub-routine is serviced, the watch timer interrupt request flag bit,  
WTIR is automatically cleared.  
bit7  
Not used for MC81F4x32  
0:Disable watch timer; Clear frequency  
Dividing circuits  
WTEN  
Watch Timer Enable Bit  
1: Enable watch timer  
000: Set watch timer interrupt to 60.0s  
001: Set watch timer interrupt to 30.0s  
010: Not available  
011: Not available  
WTSS  
Watch Timer Speed Selection Bits  
100: Set watch timer interrupt to 1.0s  
101: Set watch timer interrupt to 0.5s  
110: Set watch timer interrupt to 0.25s  
111: 1/100s stop watch for real timer  
Not used for MC81F4x32  
bit2 bit1  
0: Select main clock divided by 27 (fx/128)  
WTCS  
Watch Timer Clock Selection Bit  
1: Select sub clock (fxt)  
Note: Main system clock frequency (fx) is assumed to be 4.19 MHz.  
October 19, 2009 Ver.1.35  
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