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Message

External Reset vs Power Up

2005-05-04 by michael_rubinstein_sar

I'm debugging a new 2138 based design.

If the board is powered up, eveything works as expected.  However, if 
an external reset (\RESET) is then applied, several funny things happen:

o  JTAG stops working.
o  P0.18 which is configured as a timer capture input, sinks current.
o  P0.4 which is used as SPI SCK, in master mode, stops going high.

I verified the values in PINSEL, IODIR and IOSET.  They are correct and 
the same in both cases.

Any help appreciated.

Thanks,
Michael Rubinstein

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