| ??? 10/18/05 07:35 Read: times |
#102529 - Re: one (bad) try and a suggestion Responding to: ???'s previous message |
Erik Malund said:
one (bad) try that might save you: If the uCs are not identical, try making the other the clock source (cut and wire the XTAL1 to XTAL2 connection). a suggestion: glue a plastic case oscillator to your PCB and wire it in. I've used both these methods on a sample, in order to develop the upgraded software/firmware. Thanks anyway for the suggestions. Erik Malund said:
if possible redo the circuit and declare the upgrade a no go with current hardware Yes, I'm going to do so for the production. Erik Malund said:
get the older chip from a partminer (google on partnumber and the word "price"), a friend of mine still use the 751 which has not been made for who knows how many years (I just finished his new SMT design) he get the 751s from "partminers". This can be a good suggestion, but I have to ensure the component presence for the production. Thank you for your suggestions, Erik: I already fixed the product for using AT89S8253 and so I will redo the PCB and use it. Fausto |
