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SM79164 Datasheet(PDF) 12 Page - SyncMOS Technologies,Inc |
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SM79164 Datasheet(HTML) 12 Page - SyncMOS Technologies,Inc |
12 / 25 page Specifications subject to change without notice,contact your sales representatives for the most recent information. 12/26 Ver 2.1 SM79164 08/2006 SyncMOS Technologies International. Inc. SM79164 3.1 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 WDTE Reserve CLEAR Unused Unused PS2 PS1 PS0 Read / Write: R/W - R/W - - R/W R/W R/W Reset value: 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 WDT KEY7 WDT KEY6 WDT KEY5 WDT KEY4 WDT KEY3 WDT KEY2 WDT KEY1 WDT KEY0 Read / Write: W W W W W W W W Reset value: 0 0 0 0 0 0 0 0 |
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