Control And Indication Signals - Quectel EC200T Series Hardware Design

Clock and mode can be configured by AT command, and the default configuration is master mode using
short frame synchronization format with 2048kHz PCM_CLK and 8kHz PCM_SYNC.
The following figure shows a reference design of PCM interface with an external codec IC.
Figure 9: Reference Circuit of PCM Application with Audio Codec
NOTE
It is recommended to reserve an RC (R=22Ω, C=22pF) circuit on the PCM signal lines, especially for
PCM_CLK.

3.10. Control and Indication Signals

The following table shows the pin definition of control and indication signals.
Table 11: Pin Definition of Control and Indication Signals
Pin Name Pin No.
RI 17
DTR 31
W_DISABLE# 20
PERST# 22
LED_WWAN# 42
EC200T_Series_Mini_PCIe_Hardware_Design
I/O Power Domain
DO 3.3 V
DI 3.3 V
DI 3.3 V
DI 3.3 V
OC
LTE Standard Module Series
EC200T Series Mini PCIe Hardware Design
Description
Ring indication
Data terminal ready
Airplane mode control;
Pulled up by default;
Active low.
Module reset ;
Active low.
LED signal for indicating the network
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