Serial mouse specifications

■ Serial mouse communication specifications

■ Communication specifications

Baud rate 1200 bps

Start bit 1

Data bit 7

Parity bit None

Stop bit 1

Baud rate	1200 bps
Start bit	1
Data bit	7
Parity bit	None
Stop bit	1

■ Data format

Data D6 D5 D4 D3 D2 D1 D0

1st byte 1 LEFT RIGHT Y7 Y6 X7 X6

2nd byte 0 X5 X4 X3 X2 X1 X0

3rd byte 0 Y5 Y4 Y3 Y2 Y1 Y0

Data	D6	D5	D4	D3	D2	D1	D0
1st byte	1	LEFT	RIGHT	Y7	Y6	X7	X6
2nd byte	0	X5	X4	X3	X2	X1	X0
3rd byte	0	Y5	Y4	Y3	Y2	Y1	Y0

LEFT, RIGHT Button state
0:OFF / 1:ON

X[7:0] Amount of movement in the X direction (-128 to +127)
Right direction is positive

Y[7:0] Amount of movement in Y direction (-128 to +127)
Downward direction is positive

LEFT, RIGHT	Button state 0:OFF / 1:ON
X[7:0]	Amount of movement in the X direction (-128 to +127) Right direction is positive
Y[7:0]	Amount of movement in Y direction (-128 to +127) Downward direction is positive