Epson 8900 Series Transfer direction Start Bit Lsb, Serial data structures Stop Bit Parity

In addition to the data bits, each character contains the following bits.

qStart bit — A bit immediately preceding the character bits that signals the start of the asynchronous data transmission.

qParity bit — A bit immediately following the character bits that allows the printer to check the integrity of the received data. The setup menu allows you to select even, odd, mark, space, or no parity checking.

qStop bit — A bit immediately following the parity bit that signals the end of the asynchronous data transmission.

▲				transfer direction
start		1	2	3	4	5	6	7
	bit
		lsb						msb

▲					transfer direction
start		1	2	3		4	5	6	7	8
	bit
		lsb								msb

serial data structures

8		stop
		bit
▲
	parity
		bit
9		stop
		bit
▲	parity
		bit

Communication Interfaces 10-19