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IA88C00-PDW48C-R 数据表(PDF) 31 Page - InnovASIC, Inc |
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IA88C00-PDW48C-R 数据表(HTML) 31 Page - InnovASIC, Inc |
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31 / 80 page ![]() IA88C00 Data Sheet Microcontroller As of Production Version -01 Copyright © 2005 ENG 21 0 050519-00 www.Innovasic Innovasic.com Innovasic Semiconductor Page 31 of 80 1.888.824.4184 Figure 28b. Watch Dog Timer and Stop Mode Recovery Register (WDT/SMR) R230 Bank0 Bit 7 6 5 4 3 2 1 0 D7 D6 D5 D4 D3 D2 D1 D0 WDT time-out WDT Enable WDT in Stop WDT Source SMR On SMR Source Initial Value 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W This register controls the Watchdog Timer time-out and Stop recovery mode. D1, D0 Stop Mode Recovery source select. Bit D0 and D1 determine the Stop Mode Recovery source. D1 D0 0 0 Recovery from RESET only 0 1 Recovery from P22 and RESET 1 0 Recovery from P32 and RESET 1 1 Recovery from any input for Port 4 and RESET A hardware reset forces D0 and D1 to zero. D2 Stop Recovery Edge A 1 in this position indicates that a rising edge on any one of the recovery sources wakes the IA88C00 from Stop mode. A 0 indicates falling edge recovery. The reset value is 0. D3 XTAL1/RC Select for WDT When a zero is written to D3, the clock of the WDT is driven by the on-board RC oscillator. If D3 is set to 1, the WDT is driven by XTAL1. D3 has a zero reset value. D4 WDT Enable During STOP or HALT When this bit is set, WDT is enabled during STOP or HALT. In this case, recovery from STOP or HALT should be performed before the selected time-out. A 0 in this bit location disables the WDT while the IA88C00 is stopped or halted. A hardware reset forces this bit to a zero. |
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