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HD6432127RW Datasheet(PDF) 88 Page - Renesas Technology Corp |
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HD6432127RW Datasheet(HTML) 88 Page - Renesas Technology Corp |
88 / 843 page 64 End of bus request Bus request Program execution state Bus-released state Sleep mode Exception-handling state External interrupt Software standby mode RES = high Reset state STBY = high, RES = low Hardware standby mode*2 Power-down state*3 *1 Notes: 1. 2. 3. From any state except hardware standby mode, a transition to the reset state occurs whenever RES goes low. A transition can also be made to the reset state when the watchdog timer overflows. From any state, a transition to hardware standby mode occurs when STBY goes low. The power-down state also includes a watch mode, subactive mode, subsleep mode, etc. For details, refer to section 21, Power-Down State. SLEEP instruction with LSON = 0, SSBY = 0 Interrupt request End of bus request Bus request Request for exception handling End of exception handling SLEEP instruction with LSON = 0, PSS = 0, SSBY = 1 Figure 2.15 State Transitions 2.8.2 Reset State When the RES input goes low all current processing stops and the CPU enters the reset state. All interrupts are disabled in the reset state. Reset exception handling starts when the RES signal changes from low to high. The reset state can also be entered by a watchdog timer overflow. For details, refer to section 14, Watchdog Timer. |
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