about ADC

[lpcware]

Content originally posted in LPCWare by sanjeevudupi on Tue May 07 05:21:40 MST 2013

hello all,

i am using LPC4333FET256 for our project. in ADC driver we are using ADC0_2/ADC1_2 decicated ADC pin,

at the same time, from muti functionality pins, i am making use of ADC0_2(from PF_8 pin) and ADC1_2(from PF_9 pin).

from ADC pin select registers(SCU) "ENAIO0" register , i can select ADC0_2 and from "ENAIO1"  i can select ADC1_2 

but i am facing problem in selecting the dedicated pin. 

from which register, i can select dedicated pin ie ADC0_2/ADC1_2.

see page num 233, i attached user manual

thanks in advance

regards

sanjeevudupi

[lpcware]

Content originally posted in LPCWare by Jg on Tue May 28 03:57:52 MST 2013

The ADC0_x and ADC1_x input channels are always tied together. You cannot use them as dedicated pins. So although both ADC0/1 have 8 input channels the total number of separate channels is also 8, not 2x8.