LE910Cx HW User Guide
1VV0301298 Rev. 33 Page 4 of 128 2021-06-29
Absolute Maximum Ratings – Not Operational 34
Recommended Operating Conditions 34
Logic Level Specifications 35
4.3.1. 1.8V Pads - Absolute Maximum Ratings 35
4.3.2. 1.8V Standard GPIOs 35
4.3.3. 1.8V SD Card Pads 36
4.3.4. 1.8V SIM Card Pads 36
4.3.5. Dual Voltage Pads - Absolute Maximum Ratings 37
4.3.6. SD Card Pads @ 2.95V 37
4.3.7. SIM Card Pads @2.95V 37
5. HARDWARE COMMANDS 39
Turning on the LE910Cx Module 39
Initialization and Activation State 39
Turning off the LE910Cx Module 44
5.3.1. Shutdown by Software Command 44
5.3.2. Hardware Shutdown 45
5.3.3. Unconditional Hardware Shutdown 46
Powering OFF the Module 47
Fast Power Down 47
5.5.1. Fast Shut Down by Hardware 48
5.5.2. Fast Shut Down by Software 50
6. POWER SUPPLY 51
Power Supply Requirements 51
Power Consumption 51
General Design Rules 53
6.3.1. Electrical Design Guidelines 54
6.3.1.1. + 5V Input Source Power Supply – Design Guidelines 54
6.3.1.2. + 12V Input Source Power Supply – Design Guidelines 55
6.3.1.3. Battery Source Power Supply – Design Guidelines 56
6.3.2. Thermal Design Guidelines 56
6.3.3. Power Supply PCB Layout Guidelines 58
7. ANTENNA(S) 60
GSM/WCDMA/TD-SCDMA/LTE Antenna Requirements 60
