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參數(shù)資料
型號: W78L365A24DL
廠商: WINBOND ELECTRONICS CORP
元件分類: 微控制器/微處理器
英文描述: 8-BIT MICROCONTROLLER
中文描述: 8-BIT, FLASH, 24 MHz, MICROCONTROLLER, PDIP40
封裝: ROHS COMPLIANT, DIP-40
文件頁數(shù): 17/42頁
文件大小: 474K
代理商: W78L365A24DL
W78LE365/W78L365A
Publication Release Date: January 10, 2007
- 17 -
Revision A7
PWM0 Register
Bit:
7
6
5
4
3
2
1
0
Mnemonic: PWM0 Address: DAH
PWMP Register
Bit:
7
6
5
4
3
2
1
0
Mnemonic: PWMP Address: D9H
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
ENWPM4
Mnemonic: PWMCON2 Address: CEH
PWM4OE: Output enable for PWM4
ENPWM: Enable for PWM4
5.8
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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