Clock Input And Output Connectors - Lnk SoundWire User Manual

1.3.3.

Clock input and output connectors

The unit can input an external clock to feed the SoundWire Traffic Generator. It can also output a
configurable clock. The connectors are 50 Ohms SMA.
The input impedance is configurable and can be set to 50 Ohms or 1MOhms. The 50 Ohms state
is indicated by a glowing yellow led close to the input connector. The clock signalling level is
programmable (from 0.9V to 3.2V by steps of 50mv).
Electrical Parameter
Clock signaling level
Output impedance
Input impédance
Input frequency
The unit has a flexible clock tree.
The traffic generator clock can be generated from a 12.288 MHz high purity oscillator or from an
externally fed clock. The PLLs are actually bypassed when the desired frequencies can be derived
from the reference clock by an integer divider. If this is not possible, the PLL is used.
SoundWire Protocol Analyzer
Min Nominal Max
0.9
50
50
1
0
User Manual V1.0
Units Remarks
3.2 V Programmable by steps of 50 mV
Ohms
1M Ohms Programmable (50R or 1M)
50 MHz When PLL are used
26 MHz When using direct feed
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