ADC LPC18xx/LPC43xx

Discussion created by lpcware Employee on Jun 15, 2016
Content originally posted in LPCWare by Koen on Thu Feb 28 02:21:44 MST 2013

Does anyone know how the ADC pin multiplexing works on the LPC1800 and LPC4300 series?

I am using the LPC1837 in aLQFP144 housing. On page 1139 of the user manual there is a list of analoginput pins. For example the datasheet states that signal ADC0_0 on port P4_3 isshared between ADC0 and ADC1.

How can I select betweenthe dedicated ADC pin and this one? Ithink that P4_3(ADC0_0 ) is only routed to ADC0 (typo in datasheet). When Ienable ADC0_0 on P4_3 I can probably only use the dedicated ADCx_0pin in combination with ADC1. I assume the dedicated ADCx_0 pin is disabled onADC0 (because I already use P4_3 on ADC0).

How can I otherwise sampleal the listed pins on page 1139 of the datasheet.

Can someone confirm my suspicionor tell me otherwise?