I would expect both/all models to program the AT89C2051 fine, - I've asked the person listed in the Willar Progammer help-about, if AT89LP2052 support is planned, or in some new release ? (Aliexpress show STC90C58RD+ one for $6.80, free shipping) STC-ISP (Ver6.86L) PC software, and I have programmed other STC parts using that PC software and TTLUART-USB bridges. Their pictures show more than one PCB design (you have to love Chinese eBay listings !) - the SyncMOS SM8958 I'm not sure how to program, but the STC90C58RD+ shows in the menu of my Just maybe, there could be some update in the future**, to add new devices, in case that cannot all be done PC-Side. Sorry if I was unclear - I'm talking here about the programmer firmware, which will (of course) come preloaded. Do you mean that if I don't get the board with the STC 90C58RD+ chip on it I won't be able to reprogram my AT89C2051? ~~~~~~~~~~~~~~~~ Edit below 6 lines to suit PCB design RESETS BIT P1.0 unused in code, use for 1s toggle check = INT0 STOP BIT P3.5 Push Button, LOW = closed assumed START BIT P3.4 Push Button, LOW = closed assumed then short each of P1.1.P1.7, to confirm left digit, a.f mapping)ĭIG_1 BIT P3.0 LOW Enables leftmost DIGIT It's this pin mapping I wanted to check : (modify to match your PCB, if needed - short P3.0. I've only tried the 5V supply input though. It supports either a 3V or a 5V power supply. Mine has an additional resistor, a couple of diodes and an additional cap.
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