phyBOARD-Wega AM335x [PB-00802-xxx]
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©
PHYTEC Messtechnik GmbH 2014 L-792e_1
3.2.5
Audio Interface (X55 and X73)
The audio interface provides a method of exploring AM335x’s audio capabilities. The
phyBOARD-Wega is populated with an audio codec at U35. The audio codec is connected to
the AM335x’s McASP0 interface to support stereo line input and stereo line output at
connector X73. In addition to that the phyBOARD-Wega has one direct mono speaker
output (1 W) at the Molex connector X55.
Figure 8:
Audio Interfaces at Connectors (X55 and X73)
Pin Signal
Pin Signal
1 LINE_IN_L
2 LINE_IN_R
3 AGND
4 AGND
5 LINE_OUT_L
6 LINE_OUT_R
Table 9:
Pin Assignment of Audio Connector X73
Pin
Signal
Description
1
SPOP
Class-D positive differential output
2
SPOM
Class-D negative differential output
Table 10:
Pin Assignment of Audio Connector X55
The audio codec can be configured via I²C interface I²C0 at address 0x18.
For additional audio applications the McASP0 interface of the AM335x including the signals
X_MCASP0_AHCLKX, X_I2S_CLK, X_I2S_FRM, X_I2S_ADC and X_I2S_DAC are routed to the
A/V connector X71 (please refer to
section 4.6.2
for additional information on the A/V
connector).
Please refer to the audio codec’s reference manual for additional information regarding
the special interface specification.
X55:
Speaker
X73:
Line In
Line Out
