Control And Indication Signals - Quectel EC200T 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
RI
DTR
W_DISABLE#
PERST#
LED_WWAN#
EC200T_Mini_PCIe_Hardware_Design
PCM_CLK
PCM_SYNC
PCM_DOUT
PCM_DIN
I2C_SCL
I2C_SDA
Module
1.8V
Pin No. I/O Power Domain
17 DO 3.3V
31 DI 3.3V
20 DI 3.3V
22 DI 3.3V
42 OC
LTE Standard Module Series
EC200T Mini PCIe Hardware Design
MIC_BIAS
BCLK
FS
MIC+
MIC-
DACIN
ADCOUT
SPKOUT+
SCLK
SDIN
SPKOUT-
Codec
Description
Output signal used to wake up the host
Sleep mode control
Airplane mode control;
Pulled up by default;
Active low.
Fundamental reset signal;
Active low.
LED signal for indicating the network
26 / 45