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BM83 Datasheet(PDF) 48 Page - Microchip Technology |
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BM83 Datasheet(HTML) 48 Page - Microchip Technology |
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48 / 76 page  Figure 6-11. Timing Sequence of Power Off State BAT_IN +4V PWR (MFB) MCU sends RST_N BK_OUT LDO31_VO UART Bus 2s 1s BM83 sends power Off ACK Timing sequence of power Off state: • For a byte write: 0.01 ms x 32 clock x 2 = 640 μs. • It is recommended to have ramp-down time more than 640 μs during the power Off sequence to ensure safe operation of the device. Figure 6-12. Timing Sequence of Power On (NACK) BAT_IN SYS_PWR 1 ms idle Power On MCU state PWR (MFB) BK_OUT/LDO31_VO 400 ms RST_N MCU sends UART command NACK Power On ACK ACK BM83 response UART state Set “Power On Directly” boot 10 ms 20 ms Retry, if ACK is not received 200 ms any Wait Maximum: 5 times (1s) Power On/ Initial UART Command BM83 Application Information © 2020 Microchip Technology Inc. Datasheet DS70005402C-page 48 |
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