rtd cpuModule CME37786HX, User Manual

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CME37786HX RTD Embedded Technologies, Inc.
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Multifunction Connector, CN5
The Multifunction connector implements the following functions:
• Speaker output
• AT keyboard
• System reset input
• Battery Input
The following table gives the pinout of the Multifunction connector.
Facing the connector pins, the pinout is:
Speaker
A speaker output is available on pins 1 and 2 of the Multifunction connector. These outputs are con-
trolled by a transistor to supply 0.1 watt of power to an external speaker. The external speaker should
have 8 ohm impedance and be connected between pins 1 and 2.
Keyboard
An AT compatible keyboard can be connected to the Multifunction connector. Usually PC key-
boards come with a cable ending with a 5-pin male PS/2 connector. The following table lists the re-
lationship between the Multifunction connector pins and a standard PS/2 keyboard connector.
Table 14: Multifunction Connector CN5
Pin Signal Function in/out
1 SPKR+ Speaker output (open collec-
tor) out
2 SPKR- Speaker output (+5 volts) out
3 RESET# Manual push button reset in
4 PWRSW# Power / Standby Switch --
5 KBD Keyboard Data in
6 KBC Keyboard Clock out
7 GND Ground --
8 KBP Keyboard Power (+5 volts) out
9 BAT Battery input in
10 -- Not Connected --
9 7 5 3 1
BAT GND KBD RESET SPKR+
KBP KBC SPKR-
10 8 6 4 2