以下引用8670datasheet描述:
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PIO[9]:If interrupts are enabled on VCHG the logic signal is internally routed to PIO[9] to enable CSR8670 BGA to wake up from deep sleep when VCHG is pressed,
PIO8[8]:If interrupts are enabled on VREGENABLE the logic signal is internally routed to PIO[8] to enable CSR8670 BGA to wake up from deep sleep when VREGENABLE is pressed,
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