1.3.1.
SoundWire bus connector
The SoundWire signals (clock and data) are available on a boxed IDC 16 pin header connector
with a regular pitch of 2.54 mm (0.1”). The bottom pins are all connected to ground.
The data line bus keepers cannot be controlled individually. Either all ON or all OFF.
1.3.2.
Multi-purpose connector
The signals (clock and data) are available on a boxed IDC 20 pin header connector with a regular
pitch of 2.54 mm (0.1”). The bottom pins are all connected to ground.
This connector serves multiple purposes. It features an I2C interface that can either acts as a
slave or as a master (not implemented yet). There is a dedicated trigger input pin. Six of the
seven general purpose input pins can be reassigned to a multichannel PDM input & output
interface or a multichannel PCM input or output.
Pin
Signal
Direction
1
Clock
Input & output
3
Data Line 0 (main)
Input & output
5
Data Line 1
Input & output
7
Data Line 2
Input & output
9
Data Line 3
Input & output
11
Data Line 4
Input & output
13
Data Line 5
Input & output
15
Data Line 6
Input & output
2..16
Ground
Electrical Parameter
Min
Nominal
Max
Units
Remarks
SoundWire signaling level
0.9
1.8
3.2
V
Programmable by steps of 50 mV
Bus Keeper impedance
6950
1M
Ohms
Bus keeper can be deactivated
Output impedance
15
Ohms
Input impédance
1M
Ohms
When Bus Hold is disabled
Electrical Parameter
Min
Nominal
Max
Units
Remarks
GPI & I2C signaling level
0.9
3.2
V
Programmable by steps of 50 mV
Output impedance
47
Ohms
Input impédance
47k
Ohms
SoundWire Protocol Analyzer
User Manual V1.0
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