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I need to read back a Motorola 68HC705

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penrico

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68hc705

Do somebody how to read back the code programed in a motorola 68HC705 microcontroller??

Thanks in advance.
 

comalco

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68705p3

Nearly all HC705 can be read back - but not in the direct sense....

you need to single step through in VERIFY mode, trying each hex value from 00 to FF in each location, one at a time, until you can get through an entire pass without a fail...........

easiest to do with a little VB app controlling the MCU address lines via a PC parallel port............

:p
 

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