serial control register of AT89C51 | Microcontroller › 8051 › serial control register of AT89C51 This topic has 0 replies, 1 voice, and was last updated 14 years, 3 months ago by Anonymous. Viewing 1 post (of 1 total) Author Posts August 29, 2010 at 3:28 pm #15086 AnonymousGuest In serial control register of at89c51 the last two bits (SM0,SM1)determine the framing of data. In mode 1(SM0=0& SM1=1)data is framed as 1 start bit , 1 stop bit and 8 bit data.How the data is configured in other three modes. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In