- LPC2138 AD converters
- Posted by Frank van Eijkelenburg on June 18th, 2008
Hi,
I am using a LPC2138 in my project. From this microcontroller I use
both AD converters. The problem I have:
channel 6 and 7 from AD0 are not working (I read the value 0 from the
ADC).
Other channels (0 to 4 of AD0) are working properly. Also AD1 is
working properly. I checked the PINSEL registers and these are
correct. What could cause the problem? Any ideas
TIA,
Frank
- Posted by Frank van Eijkelenburg on June 26th, 2008
On Jun 18, 4:22 pm, Frank van Eijkelenburg
<fei.technolut...@gmail.com> wrote:
Solution was to pull P0.31 high during reset. According to the manual
a low signal on this pin during reset will disable JTAG (which I don't
use). According to the errata a low signal on this pin during reset
will result in undetermined device behavior.
- Posted by emeb on June 26th, 2008
On Jun 26, 6:43 am, Frank van Eijkelenburg
<fei.technolut...@gmail.com> wrote:
Thanks for the follow-up. That's a curious little bit of undocumented
behavior.
Eric
