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Quectel EM05-G Hardware Design

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EM05-G
Hardware Design
LTE Standard Module Series
Version: 1.0.0
Date: 2021-03-19
Status: Preliminary

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Summary of Contents for Quectel EM05-G

  • Page 1 EM05-G Hardware Design LTE Standard Module Series Version: 1.0.0 Date: 2021-03-19 Status: Preliminary...
  • Page 2 To the maximum extent permitted by law, Quectel excludes all liability for any loss or damage suffered in connection with the use of the functions and features under development, regardless of whether such loss or damage may have been foreseeable.
  • Page 3 EM05-G Hardware Design Copyright The information contained here is proprietary technical information of Quectel. Transmitting, reproducing, disseminating and editing this document as well as using the content without permission are forbidden. Offenders will be held liable for payment of damages. All rights are reserved in the event of a patent grant or registration of a utility model or design.

  • Page 4: Safety Information

    Manufacturers of the cellular terminal should notify users and operating personnel of the following safety information by incorporating these guidelines into all manuals of the product. Otherwise, Quectel assumes no liability for customers’ failure to comply with these precautions.

  • Page 5: About The Document

    LTE Standard Module Series EM05-G Hardware Design About the Document Revision History Version Date Author Description 2021-03-17 Juriyi XIE/ Ethan SHAN Creation of the document 1.0.0 2021-03-19 Juriyi XIE/ Ethan SHAN Preliminary EM05-G_Hardware_Design 4 / 69...

  • Page 6: Table Of Contents

    LTE Standard Module Series EM05-G Hardware Design Contents Safety Information ............................3 About the Document ........................... 4 Contents ............................... 5 Table Index ..............................7 Figure Index ..............................8 Introduction ............................9 1.1. Reference Standard ........................ 12 1.2. Special Marks .......................... 12 Product Concept ..........................
  • Page 7 LTE Standard Module Series EM05-G Hardware Design 4.2. USB Interface .......................... 39 4.3. PCM Interface* ........................41 4.4. Control and Indication Interfaces ..................... 43 W_DISABLE1# ....................... 43 4.4.1. W_DISABLE2#* ......................44 4.4.2. WWAN_LED# ......................... 45 4.4.3. WOWWAN# ........................45 4.4.4.
  • Page 8 Table 34: (U)SIM 1.8 V I/O Requirements ....................63 Table 35: (U)SIM 3.0V I/O Requirements ....................64 Table 36: ESD Characteristics of EM05-G (Temperature: 25 ºC, Humidity: 45 %) ........64 Table 37: Absolute Maximum Ratings ......................66 Table 38: Operating and Storage Temperatures ..................66 Table 39: Related Documents ........................
  • Page 9 Figure 23: WOWWAN# Reference Circuit ....................46 Figure 24: Recommended Circuit for Configuration Pins ................49 Figure 25: Antenna Connectors on the EM05-G Module ................56 Figure 26: EM05-G RF Connector Dimensions (Unit: mm) ............... 57 Figure 27: Specifications of Mating Plugs Using Ø0.81 mm Coaxial Cables ..........58 Figure 28: Connection between the RF Connector and the 0.81 mm Coaxial Cable .......

  • Page 10: Introduction

    This document can help customers to quickly understand the interface specifications, electrical and mechanical details, as well as other related information of EM05-G module. To facilitate its application in different fields, reference design is also provided for customers’ reference. Associated with application note and user guide, customers can use the module to design and set up mobile applications easily.
  • Page 11 LTE Standard Module Series EM05-G Hardware Design And the following conditions must be met: 1. This Modular Approval is limited to OEM installation for mobile and fixed applications only. The antenna installation and operating configurations of this transmitter, including any applicable source-based timeaveraging duty factor, antenna gain and cable loss must satisfy MPE categorical Exclusion Requirements of 2.1091.
  • Page 12 LTE Standard Module Series EM05-G Hardware Design Certification (labeling requirements) above). The OEM manual must provide clear instructions explaining to the OEM the labeling requirements, options and OEM user manual instructions that are required (see next paragraph). For a host using a certified modular with a standard fixed label, if (1) the module’s FCC ID is not visible when installed in the host, or (2) if the host is marketed so that end users do not have straightforward commonly used methods for access to remove the module so that the FCC ID of the module is visible;...

  • Page 13: Reference Standard

    LTE Standard Module Series EM05-G Hardware Design be clearly visible at all times when installed in the host product; otherwise, the host product must be labeled to display the Innovation, Science and Economic Development Canada certification number for the module, preceded by the word “Contains” or similar wording expressing the same meaning, as follows: “Contains IC: 10224A-2021EM05G”...

  • Page 14: Product Concept

    Product Concept 2.1. General Description EM05-G is a series of LTE/UMTS/HSPA+ wireless communication module with receive diversity. It provides data connectivity on LTE-FDD, LTE-TDD, DC-HSDPA, HSPA+, HSDPA, HSUPA, WCDMA networks. They are standard M.2 Key-B WWAN modules. For more details, see document [1].

  • Page 15: Key Features

    LTE Standard Module Series EM05-G Hardware Design NOTE GNSS function is optional. 2.2. Key Features The following table describes the detailed features of EM05-G. Table 3: Key Features of EM05-G Feature Details Function Interface PCI Express M.2 Standard Interface ⚫...
  • Page 16 LTE Standard Module Series EM05-G Hardware Design ⚫ Support (U)SIM card: 1.8/3.0 V (U)SIM Interface ⚫ Compliant with ISO/IEC 7816-3 ⚫ Compliant with USB 2.0 specification (slave only), the data transfer rate can reach up to 480 Mbps ⚫ Used for AT command communication, data transmission, GNSS...

  • Page 17: Functional Diagram

    LPDDR2 SDRAM + NAND Flash ⚫ ⚫ Radio frequency ⚫ M.2 Key-B interface Figure 1: Functional Diagram 2.4. Pin Assignment The following figure shows the pin assignment of EM05-G. The top side contains two antenna connectors. EM05-G_Hardware_Design 16 / 69...

  • Page 18: Pin Description

    Notch Pin 11 Notch Pin 10 Notch Notch WWAN_LED# USB_DM Pin 2 W_DISABLE1# Pin 1 USB_DP FULL_CARD_POWER_OFF# CONFIG_3 Figure 2: Pin Assignment 2.5. Pin Description The following tables show the pin definition and description of EM05-G. EM05-G_Hardware_Design 17 / 69...
  • Page 19 LTE Standard Module Series EM05-G Hardware Design Table 4: Definition of I/O Parameters Type Description Analog Input Analog Output Analog Input/Output Digital Input Digital Output Digital Input/Output Open Drain Power Input Power Output Pull Up Pull Down Table 5: Pin Description...
  • Page 20 LTE Standard Module Series EM05-G Hardware Design USB_DP USB 2.0 differential data (+) Airplane mode control. W_DISABLE1# DI, OD 1.8/3.3 V Active LOW. USB_DM USB 2.0 differential data (-) RF status indication LED. WWAN_LED# DO, OD Active LOW. Ground Notch...
  • Page 21 LTE Standard Module Series EM05-G Hardware Design USIM1_VDD USIM1_CLK DO, PD (U)SIM1 card clock 1.8/3.0 V Ground USIM1_VDD USIM1_DATA DIO, PU (U)SIM1 card data 1.8/3.0 V USIM1_VDD (U)SIM1 card power supply 1.8/3.0 V Ground (U)SIM2 card hot-plug USIM2_DET DI, PU 1.8 V...
  • Page 22 LTE Standard Module Series EM05-G Hardware Design Used for external MIPI IC RFFE_CLK DO, PD 1.8 V control Ground Used for external MIPI IC RFFE_DATA DIO, PD 1.8 V control ANTCTL0* DO, PD Antenna control 1.8 V Notification from WLAN WLAN_PA_EN* 1.8 V...

  • Page 23: Evaluation Board

    If this function is required, please contact Quectel for more details. 2.6. Evaluation Board To help you develop applications conveniently with EM05-G, Quectel supplies an evaluation board (M.2 EVB), two USB type-C cables, antennas and other peripherals to control or test the module. For more details, see document [2].

  • Page 24: Operating Characteristics

    DRX run time and the current consumption in sleep mode. The longer the DRX cycle is, the lower the current consumption will be. The following section describes the power saving procedure of EM05-G module. EM05-G_Hardware_Design 23 / 69...

  • Page 25: Usb Application With Usb Remote Wakeup Function

    The module and the host will wake up in the following conditions: ⚫ Sending data to EM05-G via USB will wake up the module. When EM05-G has a URC to report, the module will send remote wake-up signals via USB bus to ⚫ wake up the host.

  • Page 26: Usb Application With Usb Suspend/Resume And Wowwan# Functions

    Sending data to EM05-G via USB will wake up the module. ⚫ When EM05-G has a URC to report, WOWWAN# signal will wake up the host. 3.2.2. Airplane Mode When the module enters airplane mode, RF function does not work, and all AT commands correlative with RF function will be inaccessible.

  • Page 27: Power Supply

    LTE Standard Module Series EM05-G Hardware Design For details of related AT commands, see document [3]. NOTES The W_DISABLE1# control function is disabled in firmware by default. It can be enabled by AT+QCFG="airplanecontrol",1. Execution of AT+CFUN will not affect GNSS function.

  • Page 28: Reference Design For Power Supply

    LTE Standard Module Series EM05-G Hardware Design composing the MLCC array, and place these capacitors close to VCC pins. The width of VCC trace should be no less than 2.5 mm. In principle, the longer the VCC trace is, the wider it should be.

  • Page 29: Monitor The Power Supply

    LTE Standard Module Series EM05-G Hardware Design MIC29302WU 3.3V LDO_IN 82K 1% 470 μF 100 nF 470 μF 100 nF 33 pF 10 pF 470R 47K 1% 4.7K MCU_POWER_ON/OFF Figure 8: Reference Circuit for the Power Supply NOTE To avoid damaging internal flash, do not switch off the power supply when the module is working normally.
  • Page 30 Low level: Turn off min = -0.3 V EM05-G can be turned on by driving the FULL_CARD_POWER_OFF# pin to a high level. It is recommended to use a host GPIO to control FULL_CARD_POWER_OFF#. A simple reference circuit is illustrated in the following figure.
  • Page 31 LTE Standard Module Series EM05-G Hardware Design A reference circuit is shown in the following figure. Module 1.8/3.3 V FULL_CARD_POWER_OFF# Figure 10: Turn on the Module Automatically The timing of turning on the module is illustrated in the following figure.

  • Page 32: Turn Off

    LTE Standard Module Series EM05-G Hardware Design 3.5. Turn off The following procedures can be applied to turn off the module normally: ⚫ Hardware shutdown: Turn off the module using the FULL_CARD_POWER_OFF# pin. ⚫ Software shutdown: Turn off the module using AT+QPOWD.

  • Page 33: Reset The Module

    LTE Standard Module Series EM05-G Hardware Design Log off from network in 3 s Powered down AT+QPOWD FUL L_CARD_POWE R_OFF# < 1 s Module Power-down procedure Running Status Figure 11: Turn-off Timing Through AT Command During power-down procedure, the module will log off from network and save important data. After the module logs off, it sends URC “POWERED DOWN”...
  • Page 34 LTE Standard Module Series EM05-G Hardware Design Host Module RESET# Reset pulse PMIC GPIO 150–460 ms 100k Figure 12: Reference Circuit of RESET# with NPN Driver Circuit Module RESET# Reset Logic 33 pF 150-460 ms Note: The capacitor C1 is recommended to be less than 47 pF.
  • Page 35 LTE Standard Module Series EM05-G Hardware Design The reset timing is illustrated by the following figure. 460 ms 150 ms RESET# = 1.8 V 0.5 V Module Running Resetting Restart Status Figure 14: Reset Timing of the Module NOTE Ensure that there is no large capacitance on RESET# pin.

  • Page 36: Application Interfaces

    LTE Standard Module Series EM05-G Hardware Design Application Interfaces The physical connections and signal levels of EM05-G comply with PCI Express M.2 specifications. This chapter mainly describes the definition and application of the following interfaces of EM05-G: ⚫ (U)SIM interface ⚫...

  • Page 37: Normally Closed (U)Sim Card Connector

    LTE Standard Module Series EM05-G Hardware Design USIM2_VDD USIM2_DATA DIO, PU (U)SIM2 card data 1.8/3.0 V USIM2_VDD USIM2_CLK DO, PD (U)SIM2 card clock 1.8/3.0 V USIM2_VDD USIM2_RST DO, PD (U)SIM2 card reset 1.8/3.0 V USIM2_DET DI, PU (U)SIM2 card hot-plug detect 1.8 V...

  • Page 38: Normally Open (U)Sim Card Connector

    LTE Standard Module Series EM05-G Hardware Design 4.1.3. Normally Open (U)SIM Card Connector With a normally open (U)SIM card connector, CD1 and CD2 of the connector are disconnected when there is no (U)SIM card inserted. (U)SIM card detection by low level is applicable to this type of connector.

  • Page 39: U)Sim Card Connector Without Hot-Plug

    Figure 17: Reference Circuit of (U)SIM Interface with a 6-Pin (U)SIM Card Connector 4.1.5. (U)SIM 2 Card Connector EM05-G provides two (U)SIM interfaces. (U)SIM1 interface is used for external (U)SIM card only, and (U)SIM2 interface is used for external (U)SIM card or internal eSIM card. The default function is eSIM.

  • Page 40: U)Sim Design Notices

    For USIM_DATA, a 10–20 kΩ pull-up resistor must be added near the (U)SIM card connector. 4.2. USB Interface EM05-G is compliant with USB 2.0 specification. It can only be used as a slave device. Meanwhile, it supports high speed (480 Mbps) and full speed (12 Mbps) mode. The USB interface is used for AT command communication, data transmission, GNSS NMEA output, software debugging and firmware upgrade.
  • Page 41 LTE Standard Module Series EM05-G Hardware Design Test Points Minimize these stubs Module NM_0R NM_0R USB_DM USB_DM USB_DP USB_DP ESD Array Close to Module Figure 18: Reference Circuit of USB 2.0 Interface A common mode choke L1 is recommended to be added in series between the module and customer’s MCU to suppress EMI spurious transmission.

  • Page 42: Pcm Interface

    LTE Standard Module Series EM05-G Hardware Design 4.3. PCM Interface* The module supports audio communication via Pulse Code Modulation (PCM) digital interface. The PCM interface supports the following modes: ⚫ Primary mode (short frame synchronization): the module works as both master and slave.
  • Page 43 LTE Standard Module Series EM05-G Hardware Design 125 μs PCM_CLK PCM_SYNC PCM_DOUT PCM_DIN Figure 20: Auxiliary Mode Timing The following table shows the pin definition of PCM interface which can be applied to audio codec design. Table 12: Pin Definition of PCM Interface Pin No.

  • Page 44: Control And Indication Interfaces

    1.8 V 4.4.1. W_DISABLE1# EM05-G provides a W_DISABLE1# pin to disable or enable airplane mode through hardware operation. The W_DISABLE1# pin is pulled up by default. Driving it low will set the module to airplane mode. In airplane mode, the RF function will be disabled.

  • Page 45: W_Disable2

    EM05-G Hardware Design 4.4.2. W_DISABLE2#* EM05-G provides a W_DISABLE2# pin to disable or enable the GNSS function. The W_DISABLE2# pin is pulled up by default. Driving it low will disable the GNSS function. The combination of W_DISABLE2# pin and AT commands controls the GNSS function.

  • Page 46: Wwan_Led

    LTE Standard Module Series EM05-G Hardware Design 4.4.3. WWAN_LED# WWAN_LED# is used to indicate the RF status of the module, and its sink current is up to 9 mA. To reduce current consumption of the LED, a current-limited resistor must be placed in series with the LED, as illustrated by the figure below.

  • Page 47: Dpr

    EM05-G provides a DPR (Dynamic Power Reduction) pin for body SAR (Specific Absorption Rate) detection. The signal is sent from the proximity sensor of a host system to EM05-G module to provide an input trigger, which will reduce the output power in radio transmission.

  • Page 48: Cellular/Wlan Coex Interface

    LTE Standard Module Series EM05-G Hardware Design 4.5. Cellular/WLAN COEX Interface* EM05-G provides a cellular/WLAN COEX interface, the following table shows the pin definition of this interface. Table 19: Pin Definition of COEX Interface Pin No. Pin Name Description DC Characteristic...

  • Page 49: Configuration Pins

    LTE Standard Module Series EM05-G Hardware Design NOTE If this function is required, please contact Quectel for more details. 4.7. Configuration Pins EM05-G provides four configuration pins, which are defined as below. Table 21: Configuration Pins List of M.2 Specification...
  • Page 50 LTE Standard Module Series EM05-G Hardware Design The following figure shows a reference circuit for these four pins. Host Module VCC_IO_HOST 0Ω CONFIG_0 GPIO 0Ω CONFIG_1 GPIO NM-0Ω CONFIG_2 GPIO NM-0Ω CONFIG_3 GPIO Note: The voltage level of VCC_IO_HOST depends on the host side and could be 1.8 V or 3.3 V.

  • Page 51: Rf Characteristics

    RF Characteristics 5.1. Cellular Antenna Interfaces EM05-G is mounted with three 2 × 2 mm antenna connectors for external antenna connection: a main antenna connector, a Rx-diversity antenna connector, and a GNSS antenna connector. The impedance of the antenna connectors is 50 Ω.
  • Page 52 LTE Standard Module Series EM05-G Hardware Design WCDMA B8 880–915 925–960 WCDMA B19 830–845 875–890 LTE-FDD B1 1920–1980 2110–2170 LTE-FDD B2 1850–1910 1930–1990 LTE-FDD B3 1710–1785 1805–1880 LTE-FDD B4 1710–1755 2110–2155 LTE-FDD B5 824–849 869–894 LTE-FDD B7 2500–2570 2620–2690 LTE-FDD B8 880–915...

  • Page 53: Receiving Sensitivity

    LTE Standard Module Series EM05-G Hardware Design 5.1.3. Receiving Sensitivity The following tables show conducted RF receiving sensitivity of EM05-G series module. Table 25: EM05-G Conducted RF Receiving Sensitivity Frequency Bands Primary Diversity SIMO 3GPP (SIMO) WCDMA B1 -106.7 dBm WCDMA B2 -104.7 dBm...

  • Page 54: Rf Output Power

    LTE-FDD B71 (10 MHz) -101.2 dBm -93.5 dBm 5.1.4. RF Output Power The following table shows the RF output power of EM05-G module. Table 26: Conducted RF Output Power of EM05-G Max. RF Output Power Min. RF Output Power Frequency Bands LTE-FDD Bands 24 dBm ±2 dB...

  • Page 55: Gnss Antenna Interface

    EM05-G supports standard NMEA-0183 protocol, and outputs NMEA sentences at 1 Hz data update rate via USB interface by default. By default, EM05-G GNSS engine is switched off. It has to be switched on via AT command. For more details about GNSS engine technology and configurations, see document [4].

  • Page 56: Gnss Performance

    LTE Standard Module Series EM05-G Hardware Design 5.2.3. GNSS Performance The following table shows GNSS performance of EM05-G module. Table 28: GNSS Performance Parameter Description Conditions Typ. Unit Cold start Autonomous Sensitivity Reacquisition Autonomous (GNSS) Tracking Autonomous Autonomous Cold start...

  • Page 57: Antenna Connectors

    Figure 25: Antenna Connectors on the EM05-G Module 5.3.2. Antenna Connector Size EM05-G is mounted with standard 2 mm × 2 mm receptacle antenna connectors for convenient antenna connection. The antenna connector’s PN is IPEX 20579-001E, and the connector dimensions are...

  • Page 58: Antenna Connector Installation

    LTE Standard Module Series EM05-G Hardware Design Figure 26: EM05-G RF Connector Dimensions (Unit: mm) Table 29: Major Specifications of Antenna Connectors Item Specification Nominal Frequency Range DC to 6 GHz Nominal Impedance 50 Ω Temperature Rating -40 °C to +85 °C...
  • Page 59 Figure 27: Specifications of Mating Plugs Using Ø 0.81 mm Coaxial Cables Figure 28: Connection between the RF Connector and the 0.81 mm Coaxial Cable The following figure illustrates the connection between the receptacle antenna connector on EM05-G and the mating plug using a Ø1.13 mm coaxial cable.

  • Page 60: Antenna Requirements

    LTE Standard Module Series EM05-G Hardware Design Figure 29: Connection between Receptacle and Mating Plug Using Ø 1.13 mm Coaxial Cable 5.4. Antenna Requirements The following table shows the requirements on main antenna, Rx-diversity antenna and GNSS antenna. Table 30: Antenna Requirements...

  • Page 61: Reliability, Radio And Electrical Characteristics

    EM05-G Hardware Design Reliability, Radio and Electrical Characteristics 6.1. Power Supply Requirements The input voltage of EM05-G is 3.135–4.4 V, as specified by document [1]. The following table shows the power supply requirements of EM05-G. Table 31: Power Supply Requirements Min.
  • Page 62 LTE Standard Module Series EM05-G Hardware Design WCDMA @ PF = 512 (USB disconnected) LTE-FDD @ PF = 32 (USB disconnected) LTE-FDD @ PF = 64 (USB disconnected) LTE-FDD @ PF = 64 (USB suspended) LTE-FDD @ PF = 128 (USB disconnected)
  • Page 63 LTE Standard Module Series EM05-G Hardware Design WCDMA B8 HSDPA @ 21 dBm WCDMA B8 HSUPA @ 20.5 dBm WCDMA B19 HSDPA @ 21 dBm WCDMA B19 HSUPA @ 20.5 dBm LTE-FDD B1 @ 22.3 dBm LTE-FDD B2 @ 22.3 dBm LTE-FDD B3 @ 22.3 dBm...

  • Page 64: Digital I/O Characteristic

    LTE Standard Module Series EM05-G Hardware Design WCDMA B2 @ 22.5 dBm WCDMA B4 @ 22.5 dBm WCDMA B5 @ 22.5 dBm WCDMA B6 @ 22.5 dBm WCDMA B8 @ 22.5 dBm WCDMA B19 @ 22.5 dBm 6.3. Digital I/O Characteristic Table 33: Logic Levels of Digital I/O (1.8 V)

  • Page 65: Electrostatics Discharge

    The following table shows the ESD characteristics of EM05-G. Table 36: ESD Characteristics of EM05-G (Temperature: 25 ºC, Humidity: 45 %) Tested Interfaces Contact Discharge...

  • Page 66: Thermal Dissipation

    EM05-G Hardware Design 6.5. Thermal Dissipation EM05-G is designed to work over an extended temperature range. To achieve a maximum performance while working under extended temperatures or extreme conditions (such as with maximum power or data rate, etc.) for a long time, it is strongly recommended to add a thermal pad or other thermally conductive compounds between the module and the main PCB for thermal dissipation.

  • Page 67: Absolute Maximum Ratings

    LTE Standard Module Series EM05-G Hardware Design 6.6. Absolute Maximum Ratings Absolute maximum ratings for power supply and voltage on digital and analog pins of the module are listed in the following table. Table 37: Absolute Maximum Ratings Parameter Min.

  • Page 68: Mechanical Dimensions And Packaging

    EM05-G Hardware Design Mechanical Dimensions and Packaging This chapter mainly describes mechanical dimensions and packaging specifications of EM05-G module. All dimensions are measured in millimeter (mm), and the dimensional tolerances are ±0.05 mm unless otherwise specified. 7.1. Mechanical Dimensions of the Module...

  • Page 69: Top And Bottom Views Of The Module

    Images above are for illustration purpose only and may differ from the actual module. For authentic appearance and label, please refer to the module received from Quectel. 7.3. M.2 Connector EM05-G adopts a standard PCI Express M.2 connector which compiles with the directives and standards listed in document [1]. 7.4. Packaging EM05-G is packaged in tray.
  • Page 70 LTE Standard Module Series EM05-G Hardware Design Each tray contains 10 modules. The smallest package contains 100 modules. Tray packaging procedures are as below. 1. Use 10 trays to package 100 modules at a time (tray size: 247 mm × 172 mm).

  • Page 71: Appendix References

    LTE Standard Module Series EM05-G Hardware Design Appendix References Table 39: Related Documents Document Name Description PCI Express M.2 Specification PCI Express Specification Quectel_M.2_EVB_User_Guide M.2 EVB User Guide AT Commands Manual for LTE Standard Quectel_LTE_Standard_AT_Commands_Manual Modules GNSS Application Note for LTE Standard...
  • Page 72 LTE Standard Module Series EM05-G Hardware Design Electromagnetic Interference Frequency Division Duplexing GLONASS Global Navigation Satellite System (Russia) GNSS Global Navigation Satellite System Global Positioning System Global System for Mobile Communications HSDPA High Speed Downlink Packet Access HSPA High Speed Packet Access...
  • Page 73 LTE Standard Module Series EM05-G Hardware Design RFFE RF Front End Receive Specific Absorption Rate Software-Defined Radio Short Message Service Transmit UART Universal Asynchronous Receiver & Transmitter Uplink Unsolicited Result Code (U)SIM (Universal) Subscriber Identification Module Vnom Nominal Voltage Value...

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