Cavli Wireless C31SS User manual

Cavli C31SS
LTE CAT M1/NB-IoT
Smart Module
Hardware Manual
Release Version 1.4
Copyright © 2019 by Cavli Wireless Inc.
All rights reserved. All document materials, including, without limitation, the logos, design, text, graphics, other files and the selection and
arrangement are copyrighted as otherwise noted on the linked page. No part of this publication may be reproduced, distributed, or transmitted
in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written
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Cavli Wireless Inc.
177 Park Avenue
San Jose, California, USA 95113
www.cavliwireless.com
Designed in USA

Update records
Version
Date
Author
Description
V1.01
2019/7/5
Initial Document

Contents
Chapter 1. Introduction 10
Chapter 2. Review of modules 10
2.1 A brief introduction to the module 10
2.2 Main performance 11
2.3 Module function block diagram 12
2.4 Module working mode 13
Chapter 3. Interface application description 13
3.1 A summary of this chapter 13
3.2 Module interface 14
3.2.1 C31SS pins distribution diagram 14
3.2.2 Module pins description 15
3.3 Power interface 20
3.4 VDD_EXT 1V8 voltage output 20
3.5 Switchgear reset mode 21
3.5.1 Turn on the module 21
3.5.2 Starting time sequence 21
3.5.3 Power enable control 22
3.6 Signals related to Low Power Mode 23
3.6.1 Signals 23
3.7 UART interface 24
3.7.1 Serial port application circuit 25
3.8 Wakeup Interface 26

3.9 USIM interface 26
3.9.1 USIM card reference circuit 27
3.9.2 SIM_DECT hot plug reference design 28
3.10 SPI interface 29
3.11 Network indicator interface 29
3.12 General GPIO interface 30
Chapter 4. RF overall technical index 30
4.1 Summary 30
4.2 Main antenna and Auxiliary Antenna 31
4.3 Route guidance of radio frequency signal line 32
4.4 Radiofrequency connector 33
4.5 Working frequency 34
4.6 RF Output power 35
4.7 RF Sensitivity 35
Chapter 5. Electrical characteristics of interface 36
5.1 Summary 36
5.2 Module IO level 36
5.3 Electrostatic characteristics 37
5.4 Electrical maximum rating for C100SS/C10SS 38
5.5 Auxiliary ADC Specification 38
Chapter 6 Reference Circuit 40
Chapter 7. Structure and mechanical properties 41
7.1 Summary 41
7.2 Appearance 41

Chapter 8. Production and packaging 43
8.1 Summary 43
8.2 Module packaging and storage 44
8.3 Acronyms 44
Graph Contents
Chapter 1. Introduction 10
Chapter 2. Review of modules 10
2.1 A brief introduction to the module 10
2.2 Main performance 11
2.3 Module function block diagram 12
2.4 Module working mode 13
Chapter 3. Interface application description 13
3.1 A summary of this chapter 13
3.2 Module interface 14
3.2.1 C31SS pins distribution diagram 14
3.2.2 Module pins description 15
3.3 Power interface 20
3.4 VDD_EXT 1V8 voltage output 20
3.5 Switchgear reset mode 21
3.5.1 Turn on the module 21
3.5.2 Starting time sequence 21
3.5.3 Power enable control 22
3.6 Signals related to Low Power Mode 23

3.6.1 Signals 23
3.7 UART interface 24
3.7.1 Serial port application circuit 25
3.8 Wakeup Interface 26
3.9 USIM interface 26
3.9.1 USIM card reference circuit 27
3.9.2 SIM_DECT hot plug reference design 28
3.10 SPI interface 29
3.11 Network indicator interface 29
3.12 General GPIO interface 30
Chapter 4. RF overall technical index 30
4.1 Summary 30
4.2 Main antenna and Auxiliary Antenna 31
4.3 Route guidance of radio frequency signal line 32
4.4 Radiofrequency connector 33
4.5 Working frequency 34
4.6 RF Output power 35
4.7 RF Sensitivity 35
Chapter 5. Electrical characteristics of interface 36
5.1 Summary 36
5.2 Module IO level 36
5.3 Electrostatic characteristics 37
5.4 Electrical maximum rating for C100SS/C10SS 38
5.5 Auxiliary ADC Specification 38

Chapter 6 Reference Circuit 40
Chapter 7. Structure and mechanical properties 41
7.1 Summary 41
7.2 Appearance 41
Chapter 8. Production and packaging 43
8.1 Summary 43
8.2 Module packaging and storage 44
8.3 Acronyms 44
Table Contents
Chapter 1. Introduction 10
Chapter 2. Review of modules 10
2.1 A brief introduction to the module 10
2.2 Main performance 11
2.3 Module function block diagram 12
2.4 Module working mode 13
Chapter 3. Interface application description 13
3.1 A summary of this chapter 13
3.2 Module interface 14
3.2.1 C31SS pins distribution diagram 14
3.2.2 Module pins description 15

3.3 Power interface 20
3.4 VDD_EXT 1V8 voltage output 20
3.5 Switchgear reset mode 21
3.5.1 Turn on the module 21
3.5.2 Starting time sequence 21
3.5.3 Power enable control 22
3.6 Signals related to Low Power Mode 23
3.6.1 Signals 23
3.7 UART interface 24
3.7.1 Serial port application circuit 25
3.8 Wakeup Interface 26
3.9 USIM interface 26
3.9.1 USIM card reference circuit 27
3.9.2 SIM_DECT hot plug reference design 28
3.10 SPI interface 29
3.11 Network indicator interface 29
3.12 General GPIO interface 30
Chapter 4. RF overall technical index 30
4.1 Summary 30
4.2 Main antenna and Auxiliary Antenna 31
4.3 Route guidance of radio frequency signal line 32
4.4 Radiofrequency connector 33
4.5 Working frequency 34
4.6 RF Output power 35

4.7 RF Sensitivity 35
Chapter 5. Electrical characteristics of interface 36
5.1 Summary 36
5.2 Module IO level 36
5.3 Electrostatic characteristics 37
5.4 Electrical maximum rating for C100SS/C10SS 38
5.5 Auxiliary ADC Specification 38
Chapter 6 Reference Circuit 40
Chapter 7. Structure and mechanical properties 41
7.1 Summary 41
7.2 Appearance 41
Chapter 8. Production and packaging 43
8.1 Summary 43
8.2 Module packaging and storage 44
8.3 Acronyms 44

Cavli Wireless C31SS Hardware Manual
10
Chapter 1. Introduction
This document is a wireless solution product C31SS module hardware interface manual,
which is designed to describe the hardware composition and functional features of the
module, the definition and usage of the application interface, the electrical performance
and mechanical properties. Combined with this document and other application
documents, users can quickly use the module to design wireless products.
Chapter 2. Review of modules
2.1 A brief introduction to the module
Cavli C31SS module includes Cat-M1/NBIoT baseband, a complete dual band RF front end,
memory and required circuitry to meet 3GPP E-UTRA (Long Term Evolution - LTE, Release
13 set of specifications) and Verizon Wireless LTE Cat-M1 UE specifications. It is
encapsulated for LGA with 138 pins, and the structure size of the module is
21.35mm*20.25mm*1.79mm. Support the following frequency bands:
• Supported LTE Bands: B1/B2/B3/B4/B12/B13/B18/B19/B28/B66/B71
This module uses low power technology. The C31SS module can be used in the following
applications:
●Vehicle equipment
●Smart city (intelligent parking, water / gas meter, street lamp, smoke alarm,
garbage bin, etc.)
●Intelligent medical treatment
●Industrial and agricultural intelligent monitoring (machine alarm, gas detection,
irrigation, soil pH value, etc.)
●Smart home