LPM2100 bg NB Module Hardware Usage Guide
Shanghai Yuge Information Technology Co., Ltd.
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3.8 ADC interface
The LPM2100 bg series module provides a 10-bit analog-to-digital conversion input
interface for sample monitoring such as external temperature. The ADC pin voltage can be
read by the AT command.
In order to improve the accuracy of the ADC, the ADC trace should have a good
reference ground.
Table 3-10 ADC Signal Definition
Pin Signal name
IO High value
Description
21
ADC
AI
Universal analog to digital converter interface
3.9 SPI interface
The LPM2100 bg series module provides a set of SPI interfaces with an interface voltage
of IO output level.
Table 3-11 SPI Signal Definition
Pin
Pin name
IO
Functional description
Remarks
3
SPI-DI-1
DI
Host input slave output
IO voltage domain
4
SPI-DI-0
DO
Host output slave input
IO voltage domain
5
SPI-SCLK
DO
Serial clock signal
IO voltage domain
6
SPI-CS
DO
Chip select signal
IO voltage domain
Figure 3-16 SPI read timing diagram
