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HD404618TF Datasheet(PDF) 31 Page - Renesas Technology Corp |
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HD404618TF Datasheet(HTML) 31 Page - Renesas Technology Corp |
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31 / 91 page  HD404618 Series 29 , Stop mode Oscillator Internal clock RESET STOP instruction execution t > t (stabilization time) RC t res res Figure 12 Timing of Stop Mode Cancellation Watch Mode: The MCU enters watch mode if the STOP instruction is executed in active mode when TMA3 = 1, or if the STOP or SBY instruc-tion is executed in subactive mode. Watch mode is terminated by a RESET input or a timer-A/ INT 0 interrupt request. For details of RESET input, refer to the Stop Mode section. When terminated by a timer-A/ INT 0 interrupt request, the MCU enters active mode if LSON is 0, or subactive mode if LSON is 1. After an interrupt request is generated, the time required to enter active mode is t RC for a timer A interrupt, and TX (where T + tRC < TX < 2T + tRC) for an INT 0 interrupt, as shown in figure 13. Operation during mode transition is the same as that at standby mode cancellation (figure 12). Active mode Watch mode Active mode Oscillation stabilization period Interrupt strobe INT Interrupt request generation (During the transition from watch mode to active mode only) 0 TT t RC Tx T = 2 × t RC: Interrupt frame length tRC: Oscillation stabilization period Figure 13 Interrupt Frame Subactive Mode: The CPU operates with a clock generated by the X1 and X2 oscillation circuits. Functions that can operate in subactive mode are listed in table 16. When the STOP or SBY instruction is executed in subactive mode, the MCU enters either watch or active mode, depending on the statuses of |
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