Table of Contents
Advertisement
Development Kit User Guide
3.5.
Audio
Note:
HL75xx and HL85xxx modules do not support analog audio.
A headset jack (CN1105) is available on the development kit which allows the HL series module to
connect to an audio interface. Switch SW1100 allows audio selection from direct analog audio
connection or PCM codec conversion output, and switch SW1101 is used for activating an audio
amplifier. Jumpers CN1103 and CN1104 are used to bypass or to enable an audio amplifier.
Figure 15.
Audio Interface
Figure 16.
4-pin RJ9 Connector for Audio Signals
Refer to the following table for Audio connector signal pin description.
Table 5.
Audio Connector Pin Description
Pin Number
Signal Name
1
MIC_N
2
SPK_N
3
SPK_P
4
MIC_P
Both microphone and speaker signals are configured in differential mode.
4114877
SW1100
CN1103 and CN1104
SW1101
I/O
I/O Type
I
Analog
O
Analog
O
Analog
I
Analog
Rev 5.0
Description
Microphone negative input
Main speaker negative output
Main speaker positive output
Main microphone positive input
October 12, 2015
Interfaces
26
Advertisement
Table of Contents
