WP34s flashing procedure

[MarkHaysHarris777]

(02-27-2015 10:57 AM)matthiaspaul Wrote:  

(02-27-2015 03:49 AM)BarryMead Wrote:  I believe that the "Erase" button shorts the "Erase" pin to "VCC" not "GND". At least that is what the instructions say in the manual.

That's right! Thanks for the correction - this is also what is described in the processor's manual.

The original cable 'shorts' the 'erase' pin to 'high' Vcc; but that's not the right way to think about it. What is supposed to happen is that the 'erase' pin gets a nice clean 'strobe' from 'low' to 'high' and if that doesn't happen (spikes, contact bounce, ESD... ) the worst thing that could happen is that the unit's I|O will get fried, otherwise the 'erase' will fail. Since using de-bounce circuitry my flash operations have become more reliable; not perfect mind you ... still 3 out of 4 isn't bad /

Cheers,
marcus