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16F88 Comparator Module VRef

 
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16F88 Comparator Module VRef
PostPosted: Tue May 24, 2005 8:46 pm     Reply with quote
On the 16F88 if the voltage reference CVROE bit is set and the vref is output to the RA2/AN2/CVRef/VRef- pin, and the Comparator Module is configured for mode 6, is the internal vref used?
PCM programmer



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PostPosted: Tue May 24, 2005 9:06 pm     Reply with quote
See this thread. You must use Mode 2 if you want to use the internal Vref.
http://www.ccsinfo.com/forum/viewtopic.php?t=22955&highlight=16f88
dyeatman



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PostPosted: Tue May 24, 2005 9:25 pm     Reply with quote
This is shown in the datasheet in section 14.0, page 127, first paragraph.

Quote:

14.0
The comparator voltage reference generator is a 16-tap
resistor ladder network that provides a fixed voltage
reference when the comparators are in mode ‘010’. A
programmable register controls the function of the reference
generator
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