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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ACT8846 датащи(PDF) 31 Page - Active-Semi, Inc |
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ACT8846 датащи(HTML) 31 Page - Active-Semi, Inc |
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31 / 44 page  ACT8846 Rev 7.0 06-Dec-2017 Innovative PowerTM - 31 - www.active-semi.com Copyright © 2016-2017 Active-Semi, Inc. ActivePMUTM is a trademark of Active-Semi. I2CTM is a trademark of NXP. Watch-Dog Supervision The ACT8846 features a watchdog supervisory function. An internal watchdog timer of 4s is unmasked by setting either WDSREN[ ] or WDPCEN [ ] bit to one. Once enabled, the watchdog timer is reset whenever there is I2C activity for the PMU. In the case where the system software stops responding and that there is no I2C transactions for 4s, the watchdog timer expires. As a result, the PMU either perform a soft-reset or power cycle, depending on whether WDSREN [ ] or WDPCEN [ ] is set. Software-Initiated Power Cycle ACT8846 supports software-initiated power cycle. Once the SIPC[ ] bit is set, the PMU waits for 8ms and then initiate a power cycle to restart the entire system. Figure 3: ACT8846QM460 and ACT8846QM468 Power Control Sequence 100ms Sleep/Wakeup Sequence Power on Sequence nPBIN nRSTO PWREN OUT4 OUT11 2ms PWRHLD UVLO Main Battery OUT13 Power off Sequence OUT5 2ms 2ms 93% of VOUT4 OUT3 OUT1, OUT2 93% of VOUT5 2ms 93% of VOUT3 2ms 93% of VOUT11 : Watch-Dog is not supported in ACT8846QM468 and ACT8846QM490-T . |
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