I2S Triggering and Serial Decode 25
Agilent InfiniiVision 3000 X-Series Oscilloscopes User's Guide 383
Standard Alignment — MSB of data for each sample is sent first, LSB is
sent last. The MSB appears on the SDATA line one bit clock after the
edge of the WS transition.
Left-Justified — Data transmission (MSB first) begins at the edge of the
WS transition (without the one- bit delay that Standard format employs).
Right-Justified — Data transmission (MSB first) is right- justified to the
transition of WS.
12 Press the WS Low softkey; then, turn the Entry knob to select whether
WS Low indicates Left or Right channel data. The on- screen diagram
changes with your selection.
WS Low = Left Channel — Left-channel data corresponds to WS=low;
right- channel data corresponds to WS=high. WS Low=Left is the
oscilloscope's default WS setting.
WS
SCLK
SDATA
LEFT CHANNEL RIGHT CHANNEL
ONE SCLK CYCLE
MSB LSB
1 2 n-2 n-1
0
MSB LSB
1 2 n-2 n-1
0
WS
SCLK
SDATA
LEFT CHANNEL RIGHT CHANNEL
MSB LSB
1 2 n-2 n-1
0
MSB LSB
1 2 n-2 n-1
0
WS
SCLK
SDATA
LEFT CHANNEL RIGHT CHANNEL
MSB LSB
1 2 n-2 n-1
0
MSB LSB
1 2 n-2 n-1
0
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