參數(shù)資料
型號: MX10EXAQI
廠商: MACRONIX INTERNATIONAL CO LTD
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 30 MHz, MICROCONTROLLER, PQCC44
封裝: PLASTIC, LCC-44
文件頁數(shù): 25/55頁
文件大?。?/td> 476K
代理商: MX10EXAQI
31
P/N:PM0625 Specifications subject to change without notice, contact your sales representatives for the most update information. REV. 1.0, JUL. 01, 2005
MX10EXA
Table 5. Prescaler Select Values in WDCON
PRE2
PRE1
PRED
DIVISOR
00
0
32
00
1
64
0
1
0
128
0
1
256
1
0
512
1
0
1
1024
1
0
2048
1
4096
Watchdog Detailed Operation
When external RESET is applied, the following takes
place:
Watchdog run control bit set to ON (1).
Autoload register WDL set to 00 (mm. count).
Watchdog time-out flag cleared.
Prescaler is cleared.
Prescaler tap set to the highest divide.
Autoload takes place.
When coming out of a hardware reset, the software should
load the autoload register and then feed the watchdog
(cause an autoload).
If the watchdog is running and happens to underflow at
the time the external RESET is applied, the watchdog
time-out flag will be cleared.
Figure 14. Watchdog Timer in XA
PRE2
PRE1
PRE0
-
WDRUN WDTOF
WDCON
INTERNAL RESET
PRESCALER
TCLK
MOV WFEED1,#A5H
MOV WFEED2,#5AH
WATCHDOG FEED SEQUENCE
8-BIT DOWN
COUNTER
WDL
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