Hi Rashu,

Both Raghu and Erik has given you good suggestions on chip selection and that is enough for you to start with, atleast for timebeing. Good luck.

Here are some suggestions for the tool selection.

1. It is convinient and useful to have some kind of debugging tool. Especially being a newbie it will go a long way in helping you to complete the project in time.

2. If your going P89Cxxx or Atmel AT89Cxx way, get hold of a In Circuit Debugger (ICD). I don't have any pointers on this and other members can help.

3. If your application is one of or of minimal quantity, you can use Cygnal products. Their development kit comes with everything you need to start. Read the docs. Raghu's suggestion of C8051F020 is good. These chips will fulfill all your requirements and as an exercise compare their chip line up to understand them better.

4. I will leave the coding to you decide, whether C or assembler. Both have their own merits and demerits. However, follow modular programming, i.e., functions using features and pheripherals of the classic 8051(2) as one file and chip specific as separate file, etc and link them during build process. This will help you later if you decide to port them to another derivative.

5. Go one step at a time starting with smallest of the tasks first.