Cracking the
1290 chip |
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26th
Jan 2003. |
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My best (but probably wrong) theory is
:- A least one of them will be a data
line and the other could be a read/write. Alternatively the R/W may be encoded in the serial data as it is in the 2100p. But you don't need the other line then. I can't talk to the chip at all. I may have killed it somehow. The ILRS seem to output 4.6V so I would expect the chips to work on the 5V supply I'm using but maybe not. Time to dust off the CRO I guess. |
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27th
Jan 2003. 2
hours later. |