User manual

LPC4357 Developer’s Kit - User’s Guide
Page 39
Copyright 2013 © Embedded Artists AB
The audio codec provides a mono microphone input, a stereo line input, a stereo line output and a
stereo headphone output. The board also has an on-board speaker. The right line output can be used
to drive the speaker. The analog output from the LPC4357 as well (signal GPIO40).
See picture below for locating relevant components. The table below lists signal connections.
Figure 26 – I2S Audio Codec Interface
Signals
LPC4357
I2C-SDA
I2C-SDA
I2C-SCL
I2C-SCL
GPIO40
ADC0/DAC
GPIO56
P3_0
GPIO57
PC_12
GPIO58
PC_13
GPIO59
P6_0
GPIO60
P6_1
GPIO61
P6_2
GPIO68
CLK2_OUT
Speaker
SP1
Audio Connectors
Left-to-right:
J27, J28, J29, J30
Mic in, Line in, Line out, Headphone out
Audio Select
JP29
I2S Select
Left-to-right: JP22, JP23,
JP24, JP25, JP26, JP27, JP28