Quectel EC200T Hardware Design page 26

Table 10: Pin Definition of PCM and I2C Interfaces
Pin Name
PCM_CLK
PCM_DOUT
PCM_DIN
PCM_SYNC
I2C_SCL
I2C_SDA
EC200T Mini PCIe provides one PCM digital interface, which supports 16-bit linear data format and the
primary mode (short frame synchronization, works as either master or slave).
In primary mode, the data is sampled on the falling edge of the PCM_CLK and transmitted on the rising
edge. The PCM_SYNC falling edge represents the MSB. In this mode, the PCM interface supports
256kHz, 512kHz, 1024kHz or 2048kHz PCM_CLK at 8kHz PCM_SYNC, and also supports 4096kHz
PCM_CLK at 16kHz PCM_SYNC. The following figure shows the timing relationship in primary mode with
8kHz PCM_SYNC and 2048kHz PCM_CLK.
PCM_CLK
PCM_SYNC
PCM_DOUT
PCM_DIN
EC200T_Mini_PCIe_Hardware_Design
Pin No. I/O
45 IO
47 DO
49 DI
51 IO
30 OD
32 OD
1 2
MSB
MSB
Figure 8: Timing in Primary Mode
EC200T Mini PCIe Hardware Design
Power Domain Description
1.8V PCM clock signal
1.8V PCM data output
1.8V PCM data input
1.8V PCM frame synchronization
I2C serial clock.
1.8V
Require external pull-up to 1.8V.
I2C serial data.
1.8V
Require external pull-up to 1.8V.
125us
255 256
LSB
LSB
LTE Standard Module Series
MSB
MSB
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