Hi All,
I'm new in 89C51 and I'm assigned to do an upgraded project that required larger code, so i have to change the micro-controller chip from 89C51RC2H to 89C51RD2H. But I have problem getting my new 89C51RD2H chip communicate to the WINISP software.
Both hardware are identical and the circuit could only work well with my 89C51RC2H and not the 89C51RD2H. I have double checked on the setting in the WINISP and reducing the baud rate.....but just couldn't get it work.... Is there a different settings between the two, beside the "device" in the WINISP. Or a different kind of hardware circuit has to be used???
My controller communicate to the PC via a MX232 chip and only 3 pin of the serial com is being used for my hardware circuit, the TX,RD and GND. Is there anything wrong???
Pls Help!!!!
Thks
1) why do you use winisp, not FlashMagic?
2)did you forget about some memory mapped I/O
3)are you sure both are 'H' chips
Erik