8-N-1
NOTATION FOR A SERIAL PORT PARAMETER SETTING
8N1; 8/N/1; 9600-8-N-1; 9600/8/N/1; 1200-8-N-1; 1200/8/N/1; 2400-8-N-1; 2400/8/N/1
8-N-1 is a common shorthand notation for a serial port parameter setting or configuration in asynchronous mode, in which there is one start bit, eight (8) data bits, no (N) parity bit, and one (1) stop bit. As such, 8-N-1 is the most common configuration for PC serial communications today.