Hardware Description

Figure 3-24 Audio interface

Two microphone inputs are present on J4. Only monophonic sound is supported, but microphone channel CODEC_MIC1 or CODEC_MIC2 can be selected in software. Solder link LK1 selects passive or active (electret) microphones:

Link AB Active microphone with power on CODEC_MIC1 (tip). Passive microphone on CODEC_MIC2 (not powered).

This is the default configuration.

Link BC Active microphone with power on CODEC_MIC2 (ring). Passive microphone on CODEC_MIC1 (not powered).

No link Passive microphone on CODEC_MIC1 and CODEC_MIC2.

The signals associated with the audio CODEC interface are also assigned to connector J45, the AACI expansion socket pins, as shown in Table 3-13 on page 3-58.

Note

The AACI expansion connector J45 is not fitted to the PB926EJ-S.

ARM DUI 0224I

Copyright © 2003-2010 ARM Limited. All rights reserved.

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ARM ARM DUI 0224I manual No link Passive microphone on CODECMIC1 and CODECMIC2