Department of Computer Scien

ce and Information Engineering

National Cheng Kung University

HANEL

SERIAL COMMUNICA-TION

PROGRAMMINGSCON Register

(cont’)

‰SM0, SM1

¾They determine the framing of data by specifying the number of bits per character, and the start and stop bits

‰SM2

¾This enables the multiprocessing capability of the 8051

Serial Mode 1, 8-bit data, Serial Mode 2Serial Mode 3

Serial Mode 01 stop bit, 1 start bit

SM1^0101

SM0^0011

Only mode 1 is of interest to us