LPM2100 bg NB Module Hardware Usage Guide
Shanghai Yuge Information Technology Co., Ltd.
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Figure 3-17 SPI write timing diagram
3.10 I2C bus
The LPM2100 bg series module provides a set of hardware 5.0 protocol bidirectional
serial bus with a clock rate of 400KHZ and an interface voltage of IO output level.
Table 3-12 I2C pin definition
Pin Pin name IO
Functional description
Remarks
32
SCL
DO I2C bus clock output
Internal resistance pull-up
33
SDA
IO
I2C bus data input and output Internal resistance pull-up
I2C reference circuit as shown below
：
Figure 3-18 I2C interface reference circuit
The I2C_SCL and I2C_SDA pins are internally pulled up, so the external pull-up resistor
can be ignored during use.
3.11
Network indication interface*
The LPM2100 bg series module provides a NETLIGHT pin to indicate network
communication status and can be used to drive LED lights that indicate network status.
Table 3-13 Network indicator pin definition
Pin
Pin name
I/O
Description
