IBM 2142 Serial Port, Mouse, Keyboard, USB Universal Serial Bus, Power Management Power, On Ring

Serial Port

Pin	Signal	Name			I/O
1	Data	Carrier		Detect	I
2	Receive		Data		I
3	Transmit Data				O
4	Data	Terminal		Ready	O
5	Signal	Ground
6	Data	Set	Ready		I
7	Request		To Send		O
8	Clear	To	Send		I
9	Ring	Indicator			I

Mouse

Pin	Signal	Name		I/O
1	Mouse		Data	I/O
2	No	Connection
3	Ground			Power
4	+5	V	dc	Power
5	Mouse		Clock	I/O
6	No	Connection

Keyboard

Pin	Signal	Name		I/O
1	Data			I/O
2	Mouse		Data
3	Ground			Power
4	+5	V	dc	Power
5	Clock			I/O
6	Mouse		Clock

5-18

USB (Universal Serial Bus)

Pin Signal Name

1+5 V dc

2-Data

3+Data

4GND

Power Management Power

Pin Signal Name

1AUX5

2POWER_CNTRL

3Ground

On/Off Switch Connector

Pin Signal Name

1AUX5

2Switch

Modem	Wake Up		on Ring
Detect	Connector
Pin		Signal	Name
1		AUX5
2		Key	(not populated)
3		EXT_WAKEUP
4		Ground

Speaker	Connector
Pin		Signal Name
1,	2	Disabled
3,	4	Enabled