89c51rd2 programmer

I want to built a parallel programmer for 89c51rd2bn..can anyone help me???
89c51rd2 programmer

I want to built a parallel programmer for 89c51rd2bn..can anyone help me???
89C51RD2

I'm using a Phillips 89c52rd2, i'm unsing internal data and code memory, but i have problems using timers or interruptions (i'm not sure where is the problem)I don't know if it's a configuration problem...
89C51RD2

I'm using a Phillips 89c52rd2, i'm unsing internal data and code memory, but i have problems using timers or interruptions (i'm not sure where is the problem)I don't know if it's a configuration problem...
89C51rd2 Flash IAP

hi, I want to do from my application - clear flash - read a new hexfile - start the new program Have someone a sample ? Thank you for your help