Gpi Operation; Serial Audio Interface - Lnk SoundWire User Manual

Pin GPI
1 I2C_SDA
3 I2C_SCL
5 GPI6
7 GPI5
9 GPI4
11 GPI3
13 GPI2
15 GPI1
17 GPI0
19 TRIG IN
2..20 Ground
1.3.2.1.

GPI operation

The GPI pin logical levels are all sampled by the analyzer at the beginning of every frame. The
captured value are shown in the analyzer traces.
1.3.2.2.

Serial Audio Interface

The interface is always a clock master because clocks are either directly derived from the
SoundWire bus clock or generated from an external audio master clock. The Serial Audio Interface
supports PDM and PCM streaming on up to 4 data lines.
SoundWire Protocol Analyzer
PDM 8 CH IN
I/O I2C_SDA
I/O I2C_SCL
IN PDM_BCKI
IN PDM_BCKO
IN PDM_DATA4
IN PDM_DATA3
IN PDM_DATA2
IN PDM_DATA1
IN GPI0
IN TRIG IN
Pin PCM 8 CH IN
1 I2C_SDA
3 I2C_SCL
5 PCM_BCLK
7 PCM_LRCLK
9 PCM_DATA4
11 PCM_DATA3
13 PCM_DATA2
15 PCM_DATA1
17 GPI0
19 TRIG IN
2..20 Ground
User Manual V1.0
FUNCTION
PDM 4 IN / 4 OUT
I/O I2C_SDA
I/O I2C_SCL
OUT PDM_BCKI
OUT PDM_BCKO
IN PDM_DATA4
IN PDM_DATA3
IN PDM_DATA2
IN PDM_DATA1
IN GPI0
IN TRIG IN
FUNCTION
PCM 8 CH OUT
I/O I2C_SDA
I/O I2C_SCL
OUT PCM_BCLK
OUT PCM_LRCLK
IN PCM_DATA4
IN PCM_DATA3
IN PCM_DATA2
IN PCM_DATA1
IN GPI0
IN TRIG IN
PDM 8 CH OUT
I/O I2C_SDA
I/O I2C_SCL
OUT PDM_BCKI
OUT PDM_BCKO
OUT PDM_DATA4
OUT PDM_DATA3
IN PDM_DATA2
IN PDM_DATA1
IN GPI0
IN TRIG IN
I/O
I/O
OUT
OUT
OUT
OUT
OUT
OUT
IN
IN
I/O
I/O
OUT
OUT
OUT
OUT
OUT
OUT
IN
IN
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