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UPD9971 Datasheet(PDF) 76 Page - Renesas Technology Corp |
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UPD9971 Datasheet(HTML) 76 Page - Renesas Technology Corp |
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76 / 112 page  µPD9971 Data Sheet S17455EJ2V0DS 74 7.2.2 When a regulator is used <1> Set hardware reset. (Set RESET_B pin to low level instead of high level.) <2> Set REGCNT pin to low level to stop the supply of current to the digital power source. <3> With RESET_B pin set to low level, turn off REGVDD, AVDD, PLLVDD (with 3.0 V each), and EVDD (with 1.8 to 3.0 V). It is recommended that all of the power supplies be turned off at the same time. Figure 7-5 Shutdown Sequence 1 (When A Regulator Is Used) DVDD (REGOUT) AVDD, PLLVDD, REVDD EVDD REGCNT RESET_B Internal status REGUSE_B L Reset release Connect to DGND Figure 7-6 Shutdown Sequence 2 (When A Regulator Is Used) DVDD (REGOUT) AVDD, PLLVDD, REVDD EVDD REGCNT RESET_B Internal status REGUSE_B L Connect to DGND Reset release |
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