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W78E365A40DL 参数 Datasheet PDF下载

W78E365A40DL图片预览
型号: W78E365A40DL
PDF下载: 下载PDF文件 查看货源
内容描述: 8位微控制器 [8-BIT MICROCONTROLLER]
分类和应用: 微控制器和处理器外围集成电路光电二极管时钟
文件页数/大小: 43 页 / 420 K
品牌: WINBOND [ WINBOND ]
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W78E365/W78E365A  
PWM4 Register  
Bit:  
7
6
5
4
3
2
1
0
Mnemonic: PWM4  
Address: CFH  
PWM Control 2 Register  
Bit:  
7
-
6
-
5
-
4
-
3
2
1
0
-
PWM4OE  
Address: CEH  
-
ENWPM4  
Mnemonic: PWMCON2  
PWM4OE: Output enable for PWM4  
ENPWM: Enable for PWM4  
6.8 Watchdog Timer  
The Watchdog timer is a free-running timer which can be programmed by the user to serve as a  
system monitor, a time-base generator or an event timer. It is basically a set of dividers that divide the  
system clock. The divider output is selectable and determines the time-out interval. When the time-out  
occurs, a system reset can also be caused if it is enabled. The main use of the Watchdog timer is as a  
system monitor. This is important in real-time control applications. In case of power glitches or electro-  
magnetic interference, the processor may begin to execute errant code. If this is left unchecked the  
entire system may crash. The watchdog time-out selection will result in different time-out values  
depending on the clock speed. The Watchdog timer will de disabled on reset. In general, software  
should restart the Watchdog timer to put it into a known state. The control bits that support the  
Watchdog timer are discussed below.  
Watchdog Timer Control Register  
Bit:  
7
6
5
4
-
3
-
2
1
0
ENW  
CLRW  
WIDL  
PS2  
PS1  
PS0  
Mnemonic: WDTC  
Address: 8FH  
ENW : Enable watch-dog if set.  
CLRW : Clear watch-dog timer and prescaler if set. This flag will be cleared automatically  
WIDL : If this bit is set, watch-dog is enabled under IDLE mode. If cleared, watch-dog is disabled  
under IDLE mode. Default is cleared.  
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