I have a problem about reading data from MCP3204 12 bit ADC with AT89S8252. I am reading data but data range is from 800 to BFF. I tried to use V(ref) 4.096V and 5V, freq=11.0592. I can read data but from 800 to BFF. I can not read all 12 bit from serial port, but i dont know...Please help me about this problem.