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5.7.2 PCM interface definition
Pin Name
PCM_IN
PCM_OUT
PCM_SYNC
PCM_CLK
5.7.3 PCM interface description
Pin Name
Frequency.
PCM_CLK
2.048MHz
PCM_OUT
-
PCM_IN
-
PCM_SYNC 8KHz
NL668-LA series module adopts the above configuration by default, any adjustment please contact
Fibocom Wireless technical support.
5.7.4 PCM signal description
The PCM signal of NL668-LA series module adopts domestic mainstream Europe E1 standard.
PCM_CLK frequency is 2.048MHz clock in 16bit linear format encoding. PCM_SYNC is a 8kHz burst
(488nS).
Reproduction forbidden without Fibocom Wireless Inc. written authorization - All Rights Reserved.
FIBOCOM NL668-LA Series Hardware User Manual
I/O
Pin Num.
I
24
O
25
IO
26
IO
27
Table 5- 14 PCM Pin Definition
Duty Cycle
Coded Format
50%
-
-
16bit Liner mono
Short pulse
Table 5- 15 PCM Interface Description
Figure 5- 14 PCM_SYNC Timing
Description
PCM data input
PCM data output
PCM data synchronous signal
PCM clock
Operating Mode
Module
serves
as master
Description
PCM CLK
PCM Output
PCM Input
PCM Synchronous
Signal
(Falling
edge sampling)
Page 40 of 65
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