IBM CMX58886CX user manual Utility Port Connector CN5, Speaker, Pin Signal Function In/Out

Utility Port Connector (CN5)

The utility port connector implements the following functions:

•PC/AT compatible keyboard port

•PS/2 mouse port

•Speaker port (0.1W output)

•Hardware Reset input

•Battery input for Real Time Clock

•Soft Power Button input

Table 8 provides the pinout of the multi-function connector.

Table 8 Utility Port Connector (CN5)

Pin	Signal	Function	In/Out
1	SPKR+	Speaker Output (open collector)	out
2	PWR	+5 V	out
3	RESET	Manual Push-Button Reset	in
4	PWRSW	Soft Power Button	in
5	KBD	Keyboard Data	in/out
6	KBC	Keyboard Clock	out
7	GND	Ground	—
8	MSC	Mouse Clock	out
9	BAT	RTC Battery Input	in
10	MSD	Mouse Data	in/out

Facing the connector pins, the pinout is:

9	7	5	3	1
BAT	GND	KBD	RESET	SPKR+
MSD	MSC	KBC	PWRSW	PWR
10	8	6	4	2

Speaker

A speaker output is available on pins 1 and 2 of the multi-function connector. These outputs are controlled by a transistor to supply 0.1 W of power to an external speaker. The external speaker should have 8 Ω impedance and be connected between pins 1 and 2.

26 CMX58886CX cpuModule BDM-610000050 Rev A