Telit Wireless Solutions HE910 - Page 83

Telit Wireless Solutions HE910

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HE910 Hardware User Guide

1VV0300925 Rev. 32 Page 83 of 111 2019-11-25

The RS232 serial port lines are usually connected to a DB9 connector with the following

layout:

Figure 12-3 RS232 serial port lines

Table of Contents

Notice2
Copyrights2
Computer Software Copyrights2
Usage and Disclosure Restrictions3
Applicability Table4
Contents5
- Table of Contents5
1 Introduction9
- Scope9
- Audience9
- Contact Info and Support9
- Text Conventions10
- Related Documents11
2 Overview12
3 He910 Module Connections13
- Pin-Out13
- LGA Pads Layout (HE910)26
- LGA Pads Layout (HE910-D)27
- LGA Pads Layout (HE910-EUD/EUR, HE910-NAD/NAR and HE910-GL)28
- LGA Pads Layout (HE910-EUG and HE910-NAG)29
4 Hardware Commands30
- Turning on the HE91030
- VV0300925 Rev32
- Turning off the HE91035
- HE910 Unconditional Shutdown37
5 Power Supply41
- Power Supply Requirements41
- Power Consumption42
- General Design Rules44
- Electrical Design Guidelines44
- Input Source Power Supply Design Guidelines44
- Input Source Power Supply Design Guidelines45
- Battery Source Power Supply Design Guidelines46
- Thermal Design Guidelines47
- Power Supply PCB Layout Guidelines48
6 Gsm/Wcdma Radio Section50
- HE910 Product Variants50
- TX Output Power51
- Sensitivity51
- GSM/WCDMA Antenna Requirements52
- GSM/WCDMA - PCB Line Guidelines53
- PCB Guidelines in Case of FCC Certification55
- Transmission Line Design55
- Transmission Line Measurements56
  - GSM/WCDMA Antenna - Installation Guidelines58
  - Antenna Diversity Requirements58
7 Gps Receiver60
- GPS Performances60
- GPS Signals Pinout61
- RF Front End Design62
- RF Signal Requirements62
- GPS Antenna Polarization63
- GPS Antenna Gain64
- Active Versus Passive Antenna64
- GPS Antenna - PCB Line Guidelines65
- RF Trace Losses65
- Implications of the Pre-Select SAW Filter65
- External LNA Gain and Noise Figure66
- Powering the External LNA (Active Antenna)66
- External LNA Enable66
- Shielding67
- GPS Antenna - Installation67
8 Logic Level Specifications68
- Unconditional Shutdown70
9 Usb Port72
- USB 2.0 HS Description72
10 Spi Port73
- SPI Connections73
11 Usb Hsic75
12 Serial Ports77
- Modem Serial Port 1 (Usif0)78
- Modem Serial Port 2 (Usif1)81
- RS232 Level Translation82
13 Audio Section Overview84
- Electrical Characteristics84
- CODEC Examples84
14 General Purpose I/O85
- GPIO Logic Levels86
- Using a GPIO Pad as INPUT87
- Using a GPIO Pad as OUTPUT87
- Indication of Network Service Availability88
- RTC Bypass out89
- External SIM Holder Implementation89
- VAUX Power Output89
- ADC Converter90
- Description90
- Using ADC Converter90
15 Mounting the He910 on the Application91
- General91
- Module Finishing & Dimensions91
- Recommended Foot Print for the Application93
- Stencil94
- PCB Pad Design94
- PCB Pad Dimensions95
- Solder Paste97
- HE910 Solder Reflow97
  - Packing System (Tray)99
  - Packing System (Reel)102
- Carrier Tape Detail102
- Reel Detail103
- Packaging Detail104
  - Moisture Sensitivity104
16 Safety Recommandations105
- FCC/IC Regulatory Notices106
  - Anatel Approvals108
  - Document History109

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