Service Guide

LTE Standard Module Series
EC200U_Series_Hardware_Design 45 / 94
3.12. I2C Interfaces
The module provides two I2C interfaces.
Table 19: Pin Definition of I2C Interfaces
Pin Name
Pin No.
I/O
Description
Comment
I2C_SCL
41
OD
I2C serial clock
Require external pull-up to 1.8 V
if used.
If unused, keep it open.
I2C_SDA
42
OD
I2C serial data
I2C2_SCL
141
OD
I2C serial clock
I2C2_SDA
142
OD
I2C serial data
The I2C bus supports simultaneous connection of multiple peripherals except for codec IC. In other
words, if a codec IC has been mounted on the I2C bus, no other peripherals can be mounted. If there is
no codec IC on the bus, multiple peripherals can be mounted.
3.13. PCM Interface
The module provides one PCM interface which only supports slave mode.
Table 20: Pin Definition of PCM Interface
Pin Name
Pin No.
I/O
Description
Comment
PCM_DIN
24
DI
PCM data input
1.8 V power domain.
If unused, keep it open.
SPI_MOSI
38
DO
SPI master mode
output
that supports GNSS
function, the SPI function of
Pin 37–40 cannot be used
and needs to be left
unconnected.
SPI_MISO
39
DI
SPI master mode input
SPI_CLK
40
DO
SPI clock
NOTE