Alex Oca wrote:
>
> Hello Guys
>
> We have a big, big problem. We have a application with 16C74 that has an IIC
> bus to communicate to others devices and another IIC to communicate with an
> EEPROM. For the first one we use RC3-RC4 and we have no problem. The second
> one is done with RA0 (SCL) and RA1 (SDA) and also, it share the RA port with
> an output pin (RA2). Everything is Ok until a data is written into RA port
> to change the output to any digital status (high or low). After that, we
> lose the control over the EEPROM, we can not read or write any data from or
> to the EEPROM. There is no change of the digital levels of both signals (SCL
> & SDA).
> We will appreciate any help. Sorry our english.

Are any of these PORTA pins set as analog??

If so Read/Modify/Write instructions on that port will set the pins set
as analog to Logic 0.

--
Best regards

Tony

mICros
http://www.bubblesoftonline.com
mailto:sales@bubblesoftonline.com

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