Users Manual

LTE Standard Module Series
EC200T Series Mini PCIe Hardware Design
EC200T_Series_Mini_PCIe_Hardware_Design 29 / 54
Table 10: Pin Definition of PCM and I2C Interfaces
EC200T Series 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.
Figure 8: Timing in Primary Mode
Pin Name Pin No. I/O Power Domain Description
PCM_CLK 45 IO 1.8 V PCM clock signal
PCM_DOUT 47 DO 1.8 V PCM data output
PCM_DIN 49 DI 1.8 V PCM data input
PCM_SYNC 51 IO 1.8 V PCM data frame sync
I2C_SCL 30 OD 1.8 V
I2C serial clock.
Require external pull-up to 1.8 V.
I2C_SDA 32 OD 1.8 V
I2C serial data.
Require external pull-up to 1.8 V.