In SX Microcontrollers, SX/B Compiler and SX-Key Tool, wass wrote:

Recently I bought a small bunch of 28-pin DIP SX chips from a major supplier and found that a couple of them won't program (using the SX Key) with Vdd at 3 volts.  They will program with Vdd around 5 volts and they seem to run ok after programming when Vdd is 3 volts.   All the previous chips I've used program fine when Vdd is 3 volts as do some of the chips in this batch.  Is this a common problem?

Thanks,
Katie

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