Hi All,

According to what I have studied 8051 ( specifically 80C51RD+ ) UART expects:

start bit -> 7 data bits ( 8 in mode 2, 3) -> stop bit

While Microsoft Serial Mouse (2 button) sends 7 data bits and 1 stop bit i.e. no start bit click for more info . Interestingly this site says that the mouse also sends a start bit.

Now the problem is that

1. Which one of the above format is correct?


2. What 8051 serial port mode will be suitable 1 or 3


3. If no start bit is sent by mouse how can we tackle the situation.

Please help he in this. I'll be very grateful to you...

Thanks