LE910C1 Hardware User Guide
1VV0301298 Rev. 1.08 - 2017-11-14
Reproduction forbidden without written authorization by Telit Communications S.p.A. - All Rights Reserved
Telit Confidential Information, provided under NDA Page
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4. Electrical Specifications .................................................................................... 44
4.1. Absolute Maximum Ratings – Not Operational ............................................... 44
4.2. Recommended Operating Conditions ............................................................. 44
4.3. Logic Level Specifications ................................................................................. 45
4.3.1. 1.8V Pads - Absolute Maximum Ratings ............................................... 45
4.3.2. 1.8V Standard GPIOs ............................................................................ 45
4.3.3. 1.8V SD Card Pads ................................................................................. 46
4.3.4. 1.8V SIM Card Pads ............................................................................... 46
4.3.5. Dual Voltage Pads - Absolute Maximum Ratings ................................. 47
4.3.6. SD Card Pads @ 2.95V .......................................................................... 47
4.3.7. SIM Card Pads @2.95V ......................................................................... 48
5. Hardware Commands ....................................................................................... 49
5.1. Turning on the LE910C1 Module ..................................................................... 49
5.2. Initialization and Activation State .................................................................... 49
5.3. Turning OFF the LE910C1 Module ................................................................... 52
5.3.1. Shutdown by Software Command ....................................................... 52
5.3.2. Hardware Shutdown ............................................................................. 53
5.3.4. Unconditional Hardware Shutdown ..................................................... 54
6. Power Supply ................................................................................................... 55
6.1. Power Supply Requirements............................................................................ 55
6.2. General Design Rules ....................................................................................... 58
6.2.1. Electrical Design Guidelines .................................................................. 58
6.2.1.1. + 5V Input Source Power Supply – Design Guidelines ......... 58
6.2.1.2. + 12V Input Source Power Supply – Design Guidelines ....... 59
6.2.1.3. Battery Source Power Supply – Design Guidelines .............. 61
6.2.2. Thermal Design Guidelines ................................................................... 62
6.2.3. Power Supply PCB Layout Guidelines ................................................... 63
7. Antenna(s) ....................................................................................................... 64
7.1. GSM/WCDMA/LTE Antenna Requirements ..................................................... 64
7.2. GSM/WCDMA/LTE Antenna – PCB Line Guidelines ......................................... 65
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