Kontron KTAM3874-pITX - Manual (Page 29)

KTD-S0051-D Page 25 Audio Interface
KTAM3874/pITX User's Guide
11 Audio Interface
The SoC supports an Inter-IC Sound (I 2 S) codec with 24 bit resolution and 96 kHz sample rate (the
maximum rate of 96 kHz only unidirectional). The analogue-to-digital part of the codec uses 24 bit, 128x
oversampled sigma-delta ADCs. The digital-to-analogue part contains two 24 bit sigma-delta DACs. The
interface includes LINE OUT, LINE IN and MICROPHONE IN. From the six SoC audio serial ports the third port
is used (McASP 2).
11.1 Audio Hardware Features
Parameter Values Units
Output resolution (LINE OUT) 16/20/24 bit
Output sample rate (LINE OUT) 44.1/48/96 kHz
Output signal-to-noise ratio (LINE OUT) 96 dB
Input resolution (LINE IN) 16/20/24 bit
Input sample rate (LINE IN) 44.1/48/96 kHz
Input signal-to-noise ratio (LINE IN) 92 dB
11.2 Analog Connector
The analog audio interface uses the connector J800 (6 pins). A prototype adapter cable (open ended) is
deliverable (KAB-SOUND-CMP-2, part number 96063-0000-00-1).
Header Pin Signal Description Type
1 LINE_IN_L Line input left AI
2 MIC_IN Microphone input AI
3 LINE_IN_R Line input right AI
4 LINE_OUT_L Line output left AO
5 GND Ground PWR
6 LINE_OUT_R Line output right AO
11.3 Speaker Connector
The audio codec also supports a speaker driver interface. With both speaker drivers it is possible to realize a
passive stereo loudspeaker system. The drivers have a thermal shutdown feature. If the junction tempe-
rature exceeds approximately 150
0 C then the output will be disabled. The speaker interface is available
through the connector J801 (4 pins).