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FIBOCOM NL668-EAU-MiniPCIe-10 Hardware User Manual
Page 33 of 56
For more sleep command description, please refer to
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3.9 Digital Audio Interface PCM
The module provides a digital audio interface (PCM) that enables communication with digital audio
devices such as external CODECs. The interface signals include the transmission clock PCM_CLK, the
frame synchronization signal PCM_SYNC, and the input and output PCM_IN/PCM_OUT.
3.9.1 Support Models
S/N
Product model
Description
1
NL668-EAU-00-MiniPCIe-10
Support
2
NL668-EU-01-MiniPCIe-10
Support
3
NL668-EU-00-MiniPCIe-10
Support
4
NL668-EU-03-MiniPCIe-10
Support
Table 3-18 Support Models
3.9.2 PCM Interface Definition
PIN Name
I/O
PIN Num.
Description
PCM_CLK
IO
45
PCM clock
PCM_OUT
O
47
PCM data output
PCM_IN
I
49
PCM data input
PCM_SYNC
IO
51
PCM data synchronization signal
Table 3-19 PCM Interface Definition
3.9.3 PCM interface description
Single Name
Freq.
Duty Cycle
Coded Format Operating Mode
Description
PCM_CLK
2.048MHz
50%
16bit Liner
mono
Module serves as
the master that
supports PCM
PCM clock
PCM_OUT
-
-
PCM data output
PCM_IN
-
-
PCM data input
PCM_SYNC
8KHz
Short Pulse
PCM data
synchronization
signal
(Falling edge
sampling)
Table 3-20 PCM Interface Description
