Service Guide
Table Of Contents
- Safety Information
- About the Document
- Contents
- Table Index
- Figure Index
- 1 Introduction
- 2 Product Overview
- 3 Operating Characteristics
- 4 Application Interfaces
- 5 Antenna Interfaces
- 6 Reliability, Radio, and Electrical Characteristics
- 7 Mechanical Information
- 8 Storage, Manufacturing, and Packaging
- 9 Appendix References
LTE Standard Module Series
EG915U_Series_Hardware_Design 32 / 90
3.3.2. Software
AT+CFUN=<fun> provides the choice of functionality level through setting <fun> to 0, 1 or 4.
⚫ AT+CFUN=0: Minimum functionality. Both RF function and (U)SIM functions are disabled.
⚫ AT+CFUN=1: Full functionality (by default).
⚫ AT+CFUN=4: RF function is disables (airplane mode).
⚫
3.4. Power Supply
3.4.1. Power Supply Pins
The module provides 4 VBAT pins for connection with an external power supply.
⚫ Two VBAT_RF pins for RF part.
⚫ Two VBAT_BB pins for BB part.
Table 8: Pin Definition of Power Supply
When using W_DISABLE# (pin 18), please note that it will have a period of variable level state (not
controllable by software) after the module is powered on: first high level (3 V) for 2 s and then low level
(0 V) for 1.2 s, before it can be configured as 1.8 V input or output. Please evaluate whether the
unstable output state on power-up meets your application design requirements based on the specific
usage scenario and circuit design.
For more details about AT command, see document [2].
Pin Name
Pin No.
I/O
Description
Min.
Typ.
Max.
Unit
VBAT_BB
32, 33
PI
Power supply for the module’s
baseband part
3.3
3.8
4.3
V
VBAT_RF
52, 53
PI
Power supply for the module’s
RF part
3.3
3.8
4.3
V
NOTE
NOTE