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RPC564L60L5BOSY 数据表(PDF) 117 Page - STMicroelectronics |
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RPC564L60L5BOSY 数据表(HTML) 117 Page - STMicroelectronics |
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117 / 137 page ![]() DocID026934 Rev 1 117/137 RPC56EL60L5 Electrical characteristics 136 Figure 18. Reset sequence start via RESET assertion 3.19.5 External watchdog window If the application design requires the use of an external watchdog the data provided in Section 3.19 can be used to determine the correct positioning of the trigger window for the external watchdog. Figure 19 shows the relationships between the minimum and the maximum duration of a given reset sequence and the position of an external watchdog trigger window. Figure 19. Reset sequence - External watchdog trigger window position TReset, max starts here TReset, min starts here RESET_B 0.65 * VDD_HV_IO t V 0.35 * VDD_HV_IO RESET External Watchdog Window Closed Earliest Application Start Latest Application Start Internal Reset Sequence Start condition (signal or voltage rail) External Watchdog Window Open TReset, min TReset, max TWDStart, min TWDStart, max External Watchdog Window Closed External Watchdog Window Open Basic Application Init Basic Application Init Application time required to prepare watchdog trigger Watchdog needs to be triggered within this window Watchdog trigger Application Running Application Running |
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