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

Page 34
Image 34
IBM CMX58886CX user manual Utility Port Connector CN5, Speaker, Pin Signal Function In/Out