rtd BDM-610000075, User Manual, Page: 35 / 120

BDM-610000075 Rev B Chapter 3: Connecting the cpuModule 27
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
•
Soft Power Button input
•
Battery input for Real Time Clock
Table 8 provides the pinout of the multi-function connector.
Facing the connector pins, the pinout is:
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.
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
9 7 5 3 1
BAT GND KBD RESET# SPKR
MSD MSC KBC PWRSW# PWR
10 8 6 4 2