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FIBOCOM FG621-LA Series Hardware Guide
Page 37 of 57
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5.8.4 PCM Signal Description
FG621-LA series module provides PCM signal using domestic mainstream European E1 standard.
PCM_CLK is encoded by 2.048MHz clock and 16bit linear format. PCM_SYNC is an 8kHz short pulse
(488ns).
Figure 5-12 PCM_SYNC timing
Figure 5-13 PCM_CODEC to FG621-LA timing
Figure 5-14 FG621-LA to PCM_CODEC timing
Table 5-16 CODEC Timing Parameters
Timing
Min
Typ
Max
Unit
t(sync)
PCM_SYNC cycle
–
125
–
μs
t(synca)
PCM_SYNC high level time
–
488
–
ns
