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Part Number: MSP430F2122
PROBLEM WITH I/O PORT 2...."BUG" ??I have the following 2 port lines in use as follows:P2.1 = OUTput sending a TTL signal level to an external part of the circuit (BIS.B #BIT1,&P2DIR)
P2.2 = Analog input. (BIC.B #BIT2, &P2DIR)+ ADC allowable input set to include A2 (=P2.2)
THE PROBLEM. When I set P2.1 to 'output'.... P2.2 is turned into a short, and my analog voltage disappears.ERRATA I could not find any reference to this situation in the Errata file for the device.
My Schematic is attached.
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In reply to Britta Ruelander:
PROBLEM WITH PORT 2.1 and 2.2
Thanks for the contribution from Clemens and others.
FOUND IT..... yes, it was a hardware issue. There was a very fine almost invisible solder bridge between the relevant pins on the PCB.
Sorry to trouble you all, this issue is now RESOLVED...
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