lpcware

Wake-up LPC17xx using GPIO interrupt with 3V3 regulator supply only

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by da on Mon Jun 02 08:44:24 MST 2014
I would like to use some pins of GPIO port 0 to wake-up my LPC17xx controller.
The manual tells me that, if I configure the correct GPIO Interrupt Enable registers,
a rising/falling edge of one of these GPIO pins could bring my controller out of sleep mode or power-down mode.

My hardware provides 2 separated power domains: one 3.3V supply for the I/O pads (VDD 3V3), and one 3.3V supply for the CPU (VDD REG 3V3).
When the application is in sleep mode or power-down mode, the 3.3V supply for the I/O pads is disconnected for power consumption reason,
and only the 3.3V supply for the CPU (the on-chip regulator) is available.

Do you think that my GPIO port 0 interrupt can still wake-up my controller if there is no 3V3 VDD supply for the I/O pads ?

Thx,

da

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