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H8S2245 датащи(PDF) 100 Page - Renesas Technology Corp |
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H8S2245 датащи(HTML) 100 Page - Renesas Technology Corp |
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100 / 818 page ![]() Section 2 CPU Rev.3.00 Mar. 26, 2007 Page 58 of 772 REJ09B0355-0300 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*1 STBY = high, RES = low Hardware standby mode*2 Power-down state Notes: 1. 2. 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. SLEEP instruction with SSBY = 0 SLEEP instruction with SSBY = 1 Interrupt request End of bus request Bus request Request for exception handling End of exception handling 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 masked 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 11, Watchdog Timer. |
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