參數(shù)資料
型號(hào): SM59264Ihhk
廠商: Electronic Theatre Controls, Inc.
英文描述: 8 - Bit Micro-controller
中文描述: 8 -位微控制器
文件頁數(shù): 17/32頁
文件大小: 579K
代理商: SM59264IHHK
May 2002
Specifications subject to change without notice,contact your sales representatives for the most recent information.
17/32 Ver 1.0 PID 59264 05/02
SyncMOS Technologies Inc. SM59264
4.1 Watch Dog Timer Registers:
Watch Dog Timer Registers - WDT Control Register (WDTC, $9F)
WDTE: Watch Dog Timer enable bit
CLEAR: Watch Dog Timer reset bit
PS[2:0]: Overflow period select bits
Watch Dog Key Register - (WDTKEY, $97H)
By default, the WDTC is read only. User need to write values 1EH, E1H sequentially to the WDTKEY($97H) register to
enable the WDTC write attribute, That is
MOV WDTKEY, # 1EH
MOV WDTKEY, # E1H
When WDTC is set, user need to write another values E1H, 1EH sequentially to the WDTKEY($97H) register to disable the
WDTC write attribute, That is
MOV WDTKEY, # E1H
MOV WDTKEY, # 1EH
bit-7
bit-0
Read :
Write:
Reset value:
WDTE
Unused
CLEAR
Unused
Unused
PS2
PS1
PS0
0
*
0
*
*
0
0
0
PS [2:0]
Overflow Period (ms)
000
2.048
001
4.096
010
8.192
011
16.384
100
32.768
101
65.536
110
131.072
111
262.144
bit-7
bit-0
Read:
Write :
Reset value:
WDT
KEY7
WDT
KEY6
WDT
KEY5
WDT
KEY4
WDT
KEY3
WDT
KEY2
WDT
KEY1
WDT
KEY0
*
*
*
*
*
*
*
*
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