Microcontroller › 8051 › serial control register of AT89C51 › serial modes
August 31, 2010 at 7:26 am
#5029
Guest
see if it helps:
SM0 SM1 Mode Explanation Baud rate
0 0 0 8 bit shift register Oscillator/12
0 1 1 8 bit UART Set by Timer1
1 0 2 9 bit UART Oscillator/32
1 1 3 9 bit UART Set by Timer1