Technical information

Chapter 2: Developer Board and Interfaces Description
August 31, 2009 G24/H24 - Developer’s Kit 19
Audio Interface
The Developer Board includes analog and digital audio interfaces. The audio interface contains a
speaker, alert speaker, microphone, and a headset (Figure 2-11).
Figure 2-11: Audio Connectors
Speaker
The Developer Board uses an audio amplifier to amplify the speaker audio output to desired
levels. The speaker connector (J430) is labeled SPEAKER. The speaker output is 8 ohms
impedance. The Speaker Connector pinout (J430) is shown in Table 2-7.
Table 2-7: Speaker Connector Pinout (J430)
Pin # Description
1 Not connected
2 Speaker positive output
3 Not connected
4 Speaker negative output
Speaker
Connector
Alert Speaker
Connector
Microphone
Connector
Headset
Connector