Can USB be connected when LPC54114 is in deep-sleep mode

[da_chen]

I found that USB can be set to wake up the MCU when in deep-sleep mode. But what if I disable the wake up interruption from USB. Do I need to reconnect with other devices? Or if I don't shutdown the USB connection, but block the interruption, will the MCU still be waked up by USB in deep-sleep mode?

[ZhangJennie]

Hi Da Chen,

USB interrupt can wake up MCU from deep sleep mode. In order to utilize it, you need enable USB NEEDCLK interrupt.

Besides, you need also enable the USB activity wake-up interrupt in the NVIC.

For more information, see UM10914 LPC5411X user manual, 22.7.6 USB wake-up.

Have a nice day,

Jun Zhang

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