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HD6432351 датащи(PDF) 94 Page - Renesas Technology Corp |
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HD6432351 датащи(HTML) 94 Page - Renesas Technology Corp |
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94 / 1025 page ![]() Section 2 CPU Rev. 3.00 Sep 15, 2006 page 60 of 988 REJ09B0330-0300 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. The CPU enters the power-on reset state when the NMI pin is high, or the manual reset state when the NMI pin is low. 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 12, Watchdog Timer (WDT). |
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