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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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SH7041A 데이터시트(PDF) 786 Page - Renesas Technology Corp |
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SH7041A 데이터시트(HTML) 786 Page - Renesas Technology Corp |
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786 / 923 page  748 24.4.3 Standby Mode Application Example This example describes a transition to standby mode on the falling edge of an NMI signal, and a cancellation on the rising edge of the NMI signal. The timing is shown in figure 24.1. When the NMI pin is changed from high to low level while the NMI edge select bit (NMIE) of the ICR is set to 0 (falling edge detection), the NMI interrupt is accepted. When the NMIE bit is set to 1 (rising edge detection) by an NMI exception service routine, the standby bit (SBY) of the SBYCR is set to 1, and a SLEEP instruction is executed, standby mode is entered. Thereafter, standby mode is canceled when the NMI pin is changed from low to high level. Oscillator CK NMI NMIE SBY NMI exception processing Exception service routine SBY = 1 SLEEP instruction Standby mode Oscillation start time WDT time set NMI exception processing Oscillation settling time Figure 24.1 Standby Mode NMI Timing (Application Example) |
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