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3.3.7
Audio Interface
Audio Interface - CN28
Pin
Signal
Pin
1
GND
3
+3.3V_S
7
+12V_S
9
+3.3V_S
11
GND
13
+3.3V_A
15
GND
signal.
HDA_RST#/I2S_RST#: HD Audio / AC'97 / I2S Codec Reset signal.
HDA_BCLK/I2S_CLK: HD Audio / AC'97 24MHz Serial Bit Clock or I2S Serial Data Clock signal.
SPKR: Speaker output
GP0_I2C_DAT: General Purpose I2C data line.
GP0_I2C_CLK: General Purpose I2C clock line.
Please be aware that using CQ7-A42 carrier board, audio functionalities are not directly supported.
If the system's application needs audio support, it is necessary to provide external Audio codec modules, suited to the audio interface offered by the Qseven
module used.
SECO can provide for optional Audio modules with HD Audio Codec or I2S audio codec onboard. Please check paragraphs 4.2.2 and 4.2.3 for further details.
CQ7-A42
CQ7-A42 - Rev. First Edition: 1.0 - Last Edition: 2.0 - Author: S.B. - Reviewed by G.G. Copyright © 2016 SECO S.r.l.
Signal
2
GP0_I2C_DAT
4
GP0_I2C_CLK
6
SPKR
8
HDA_SDI/I2S_SDI
10
HDA_SDO/I2S_SDO
12
HDA_SYNC/I2S_WS
14
HDA_RST#/I2S_RST#
16
HDA_BCLK/I2S_CLK
®
Since Qseven
modules can have three different audio standard interfaces (AC'97, HD audio,
I2S), then on CQ7-A42 carrier board there isn't any Audio codec.
Instead, the audio signals coming out from Qseven
out directly, without further elaborations, on dedicated connector CN28,
which is a 15-pin pin header, p2.54 mm h= 6mm, type NELTRON p/n 2213S-16G-E5 or
equivalent, with the pinout shown in the table on the left.
This connector can be used to connect external audio codec modules, specific for the kind of
®
interface offered by the Qseven
module used.
Signals available on the connector are the following:
HDA_SDI/I2S_SDI: HD Audio / AC'97 / I2S Serial Data Input signal.
HDA_SDO/I2S_SDO: HD Audio / AC'97 / I2S Serial Data Output signal.
HDA_SYNC/I2S_WS: HD Audio / AC'97 Serial Bus Synchronization or I2S Word Select
®
module are carried
®
34
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