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HD6432351 Datasheet(PDF) 731 Page - Renesas Technology Corp |
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HD6432351 Datasheet(HTML) 731 Page - Renesas Technology Corp |
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731 / 1025 page  Section 20 Power-Down Modes Rev. 3.00 Sep 15, 2006 page 697 of 988 REJ09B0330-0300 20.6.4 Software Standby Mode Application Example Figure 20.2 shows an example in which a transition is made to software standby mode at the falling edge on the NMI pin, and software standby mode is cleared at the rising edge on the NMI pin. In this example, an NMI interrupt is accepted with the NMIEG bit in SYSCR cleared to 0 (falling edge specification), then the NMIEG bit is set to 1 (rising edge specification), the SSBY bit is set to 1, and a SLEEP instruction is executed, causing a transition to software standby mode. Software standby mode is then cleared at the rising edge on the NMI pin. Oscillator φ NMI NMIEG SSBY NMI exception handling NMIEG = 1 SSBY = 1 SLEEP instruction Software standby mode (power-down mode) Oscillation stabilization time tOSC2 NMI exception handling Figure 20.2 Software Standby Mode Application Example |
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