LTE Standard Module Series
EC21_Series_Hardware_Design
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The following figure shows a reference design of interfaces for WLAN and Bluetooth application with
Quectel FC20 series/FC21 modules.
Figure 26: Reference Design of WLAN & Bluetooth Applications Interfaces with FC20 Series/FC21
PCM_SYNC 26 DIO PCM data frame sync
1.8 V power domain.
Serve as output signal in master
mode.
Serve as input signal in slave mode.
If unused, keep them open.
PCM_CLK 27 DIO PCM clock
NOTE
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