whats the diff between f877s

[runner100]

Can some explain what the difference is between a Pic16f877a 20/p and a Pic16f877-I/P is??
For some reason I can program the f877a 20/P using PropicII but not the f877-I/P Ic. I tried using the new Propic XP but it doesnt work at all for win 98 and both the pic 877a 20/P and 877-I/P . All the indicators say that the chip is programmed but if you then read the chip it comes up blank. Suposedly the PropicXP is to work with win98.

thanx
runner100

 

[M!k]

Microchip has changed the programming-algorithm in the newer 16F877A PICs (take a look @ the programming specs). The old 16F877-algorithm was fucking slow. I thing this can explain your problem. I don't know how to solve it, but if you take a look at e.g. the PICALL-software (another programmer) there are two different algorithms implemented. Something like that is perhaps what you need for Propic...


Good luck
Mik