Wi-Fi&Bluetooth Module Series
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Table 11: Pin Definition of PCM Interface
The following figure shows the PCM interface connection between FC800L and the host.
FC800L
Host
PCM_CLK
PCM_SYNC
PCM_DOUT
PCM_DIN
PCM_CLK
PCM_SYNC
PCM_DIN
PCM_DOUT
Figure 7: PCM Interface Connection
3.7. Other Interfaces
3.7.1. RTC_CLK
The RTC_CLK 32.768 kHz is used for internal PMU reference clock.
Table 12: Pin Definition of RTC_CLK
Pin Name
Pin No.
I/O
Description
Comment
RTC_CLK
31
DI
External 32.768 kHz clock input
Pin Name
Pin No.
I/O
Description
Comment
PCM_SYNC
27
DI
PCM data frame sync
VDDIO power domain
PCM_DIN
28
DI
PCM data input
PCM_DOUT
29
DO
PCM data output
PCM_CLK
30
DI
PCM clock
RTC_CLK
should
surrounded
by
GND.
NOTE