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LPM2100 bg NB Module Hardware Usage Guide
3.6.3 eDRX
During each eDRX cycle, there is a Paging Time Window (PTW). The terminal listens to
the paging channel in the PTW according to the DRX cycle (the DRX cycle time is short, and
the terminal can be considered to be not sleeping and always reachable). Data, the rest of the
terminal is in a sleep state.
In eDRX mode, the terminal device can be considered as reachable at any time, but the
delay is large. The delay depends on the eDRX cycle configuration, which can balance the
low power consumption and the delay. Such as remote shutdown of the gas business.
3.7 SIM interface
The LPM2100 bg series module provides an ISO 7816-3 compliant SIM card interface.
The SIM card power supply is provided by the module's internal power manager and supports
1.8V/3.0V.
Pin
Signal name
16
SIM_DECT*
38
SIM_VDD
39
SIM_RST
40
SIM_DATA
41
SIM_CLK
42
SIM_GND
Shanghai Yuge Information Technology Co., Ltd.
Figure 3-13 eDRX power saving technology
Table 3-8 SIM card signal definition
IO
Description
DI
SIM card hot plug detection
PO
Output to the SIM card supply
voltage
DO
SIM card reset output
IO
SIM card bus data
DO
SIM card clock output
SIM card ground
Remarks
(Internal level has been
pulled up）
Keep away from
interference sources
Keep away from
interference sources
Internal 10K pull-up
resistor
Keep away from
interference sources
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