Problem with ISP programming of Atmel 89S52

[Js_Ong]

Hi, I am using the Assim Khan ISP programming to program the ATMEL 89s52 microcontroller, I am trying to develope the hardware and testing it now. when I press 'Read', my machine is reading from the microntroller, but when I was trying to write the file into my chip, there were buffer read error, saying the Read data and prog data are not same. This happened every time when I tried to click the write file, and the arror at the address was not constant, it changed. I tried to check so many times, PLS HELP!!! I need it to program my project since I do not know how to program using Serial Communication...

 

[Koson]

ISP Programming

did you set buadrate too high?

 

[Js_Ong]

Re: ISP Programming

Hi Koson, I tried to remove some resistor from the output of the buffer, now is ok.

 

[RollingEEE]

Re: ISP Programming

check your MOSI line for loose connections. It happens most of the time for loose connections

 

[manish12]

Re: ISP Programming

did any one make layout for this isp programmer,
if so plz upload it ,

 

[RollingEEE]

Re: ISP Programming

here is the PCB in Orcad 9.2