LPC Microcontrollers中的主题 Re: Comparator function possible in deep sleep or power down modes?

Comparator function possible in deep sleep or power down modes?

lpcware — Wed, 15 Jun 2016 19:59:16 GMT

Content originally posted in LPCWare by jdesbonnet on Mon Sep 22 17:24:31 MST 2014
Looking at the LPC800 datasheet and trying some experiments it seems that the comparator cannot function in deep sleep or power down modes: am I correct about this?

(I'd like to wake the device from deep sleep or power down by connecting the comparator output to a PIO pin via the switchmatrix and enabling a interrupt on that pin.)

Thanks,
Joe.

Re: Comparator function possible in deep sleep or power down modes?

lpcware — Wed, 15 Jun 2016 19:59:17 GMT

Content originally posted in LPCWare by LabRat on Mon Sep 22 17:47:01 MST 2014

Quote: jdesbonnet
Looking at the LPC800 datasheet and trying some experiments it seems that the comparator cannot function in deep sleep or power down modes: am I correct about this?

Would suggest to use WAKEUP:

UM:

Quote:

In Deep power-down only the WAKEUP pin PIO0_4 is functional.

Re: Comparator function possible in deep sleep or power down modes?

lpcware — Wed, 15 Jun 2016 19:59:17 GMT

Content originally posted in LPCWare by jdesbonnet on Tue Sep 23 01:29:06 MST 2014
The problem is that the wakeup signal is from a source that generates a pulse of about 200mV above ground. So (I think) only the comparator can detect that unless I resort to additional external components. Joe.