Telit Wireless Solutions CMB100 Series Hardware Design Manual
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Telit Wireless Solutions CMB100 Series Hardware Design Manual

Telit Wireless Solutions CMB100 Series Hardware Design Manual

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CMB100
Hardware Design Guide
1VV0301975 Rev.2
2024-11-19
Released
Confidential
Technical Documentation

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  • Page 1 CMB100 Hardware Design Guide 1VV0301975 Rev.2 2024-11-19 Released Confidential Technical Documentation...

  • Page 2: Table Of Contents

    CMB100 Hardware Design Guide Contents Applicability Table ........................5 Introduction..........................6 Scope Audience Contact Information, Support Conventions Terms and Conditions Disclaimer General Product Description ...................... 8 Overview Product Variants and Frequency Bands Main Features Mechanical Specifications 3.4.1 Dimensions 3.4.2 Weight Pins Allocation ..........................
  • Page 3 CMB100 Hardware Design Guide RF Section ........................... 35 Bands Variants TX Output Power RX Sensitivity Main Antenna Requirements 7.4.1 Antenna Installation Guidelines Diversity Antenna Requirements GNSS Section ..........................38 GNSS U.FL input and 3.1V LDO 8.1.1 Guidelines for GNSS Antenna 8.1.2 Hardware-Based Solution for GNSS and LTE Coexistence GNSS Antenna Requirements...
  • Page 4 CMB100 Hardware Design Guide Document History ........................62 1VV0301975 Rev.2 Page 4 of 63 2024-11-19...

  • Page 5: Applicability Table

    CMB100 Hardware Design Guide Applicability Table Table 1: Applicability Table Name Product Variant Part Number CMB100A0-WW LTE CAT4 + 3G + 2G CMB100A0WW101B0200 CMB100B0-WW LTE CAT1bis CMB100B1WW101B0100 CMB100C0-WW LTE CATM1 +2G CMB100C0WW101B0200 CMB100D0-WW 5G NR RED CAP CMB100D0WW101B0100 Table 2: Reference Documents Table Title Reference LE910Cx AT Command Guide...

  • Page 6: Introduction

    CMB100 Hardware Design Guide Introduction Scope This document introduces the CMB100 pre-certified module board and presents possible and recommended hardware solutions for the development of a product based on this application. All the features and solutions described in this document apply to all CMB100 variants listed in the applicability table.

  • Page 7: Conventions

    CMB100 Hardware Design Guide Conventions Note: Provide advice and suggestions that may be useful when integrating the module. Danger: This information MUST be followed, or catastrophic equipment failure or personal injury may occur. Warning: Alerts the user on important steps about the module integration.

  • Page 8: General Product Description

    CMB100 Hardware Design Guide General Product Description Overview The CMB100 pre-certifed module board is an application board that allows integrators to plan on availability for even the longest lifecycle applications, highly recommended for new designs specified for worldwide coverage. In particular we offer three variants for this product: •...

  • Page 9: Main Features

    CMB100 Hardware Design Guide Product 2G Band LTE-FDD LTE-TDD GNSS (MHz) B25, B26, B27, B28, B66, B71, For details information about frequencies and bands, refer to the RF Section Note: Cellular technologies and frequency bands that are enabled may vary based on the firmware version and firmware configuration used.

  • Page 10: Weight

    CMB100 Hardware Design Guide 3.4.2 Weight The nominal weight of the CM100A0 is 10grams. The nominal weight of the CM100B0 is grams. The nominal weight of the CM100C0 is 9 grams. 1VV0301975 Rev.2 Page 10 of 63 2024-11-19...

  • Page 11: Pins Allocation

    CMB100 Hardware Design Guide Pins Allocation Pin-out Table 5: Pin-out Information Pin Signal Characteristic Function Type Comment nRST_OUT Open Collector Application Leave open if Output MCU SW unused reset PWR PWR_GND Connect to CTS_HOST Low impedance UART CMOS Leave open if output OUTPUT @VIO...
  • Page 12 CMB100 Hardware Design Guide Pin Signal Characteristic Function Type Comment 12 EM_OFF PD (Active high) EMERGENCY CMOS Leave open if MODEM HW @VIO unused RESET Recommend ed to connect. 13 IO1_HOSTI PD/PU GPIO CMOS Leave open if (customizable @VIO unused via AT command) 14 BOOT_HOST...
  • Page 13 CMB100 Hardware Design Guide Figure 1 CMB100XX Pin Numbering 1VV0301975 Rev.2 Page 13 of 63 2024-11-19...

  • Page 14: Power Supply

    CMB100 Hardware Design Guide Power Supply The power supply circuitry and the board layout are a fundamental part of the full product design and they strongly impact on the product's overall performance, so the following guidelines should be read carefully for a proper design. The CMB100 has been designed with a onboard DC-DC capable to process any voltage in the range between 1.8-5.5Vand grant proper current and voltage condition to the on board module for operating properly.

  • Page 15: Power Consumption

    CMB100 Hardware Design Guide Note: The Operating nor the Extended Voltage Range MUST • never be exceeded; the application’s power supply section must be designed with care to avoid excessive voltage drops on supplying lines A voltage drop below the lower range limits may cause •...
  • Page 16 CMB100 Hardware Design Guide Idle Current 1.8VDC/2.5VDC 3.8VDC 5.5VDC (mA) CFUN=1 CMB100B1 CMB100C0 672 mA @2.5V* 430 mA 250mA CMB100D0 Pk Tx Current (mA) CMB100A0 1302mA 769mA 539mA CMB100B0 916mA 570mA 404mA CMB100B1 CMB100C0 827mA 502mA 381mA CMB100D0 Avg GNSS 1.8V 3.8V Current (mA) -...

  • Page 17: General Design Rule

    CMB100 Hardware Design Guide General Design Rule The main guidelines for the Power Supply Design include three different design steps: The electrical design of the power supply • The PCB layout • The thermal design • 5.3.1 Electrical Design Guidelines The input power supply electrical design is extremely important.

  • Page 18: Power Supply Beyond Standard Or Extended Range Design Guidelines: 5.5V To 36V Example

    CMB100 Hardware Design Guide See schematic below: CMB100 20-pin Connector VIO Power Supply VIN Power Supply 100 nF BLM18EG101TN1 100 ohm 0603 100 uF or higher 10 V NOTE: Place L1 and C2 as close as possible to SO1 pin 20 Figure 2: Recommended CMB100 power supplies guideline 5.3.1.2 Power supply beyond Standard or Extended Range Design Guidelines: 5.5V to 36V example...

  • Page 19: Battery Source Power Supply Design Guidelines

    CMB100 Hardware Design Guide Figure 3: Example of Switching Regulator with 5V5 to 36V Input 5.3.1.3 Battery Source Power Supply Design Guidelines The desired nominal power supply is 3.8V, so a single 3.7V Li-Ion cell battery type is suitable to supply power to the CMB100. Power line length between battery and CMB100 should be minimized.

  • Page 20: Thermal Design Guidelines

    CMB100 Hardware Design Guide Place low ESR bypass capacitors close to the series power BLM. In case of a • switching power supply a second low ESR capacitor should be placed close to the application board DCDC inductor to cut the ripple, provided the PCB trace from the capacitor to the CMB100 (please check Figure 2) is wide enough to ensure a voltage drop less connection even during an 0.6 A (LTE) or 2A (GSM) current peak.
  • Page 21 CMB100 Hardware Design Guide • Mounting: Use metal standoffs and screws to mount the CMB100, which will enhance its thermal dissipation. • Thermal connectivity: A possible way is to use a thermal pad between the host PCB and CMB100. Additionally, a heatsink can be used. Finally, it is always recommended that thermal testing will be performed on the end device under the expected deployment conditions to verify the thermal performance.

  • Page 22: Digital Section

    CMB100 Hardware Design Guide Digital Section CMB100 has four main operation states: OFF state: VIN is applied and RTC is running, only. Baseband is switched OFF and • switching to ON state is possible only. ON state: baseband is fully switched on and CMB100 is ready to accept AT •...

  • Page 23: Software Ready Control: Mdm_Ison

    CMB100 Hardware Design Guide Software Ready Control: MDM_IsOn CMB100xx pin 5 high logic state indicates CMB100 built-in modem is up and running (Software Ready). MDM_IsOn is internally connected to modem general purpose pin GPIO_08. On CMB100B0 and CMB100C0 only , if you need to updatede the firmware you have to send the command AT#GPIO=8,1,1,1 in order to reset the MODEM READY function.
  • Page 24 CMB100 Hardware Design Guide A flow chart showing the proper CMB100 Power-On procedure is displayed below: Figure 4: Power On Procedure Flow Chart 1VV0301975 Rev.2 Page 24 of 63 2024-11-19...

  • Page 25: Power Off

    CMB100 Hardware Design Guide A flow chart showing the AT commands managing procedure is displayed below: Figure 5: AT commands Managing Procedure Flow Chart Note: To avoid any back-powering effect it is recommended to prevent any high logic level signal from being applied to CMB100 control pins when the module is powered off or during an ON-OFF transition.

  • Page 26: Wake From Deep Sleep Mode

    CMB100 Hardware Design Guide Warning: Not following the recommended shut-down procedures might damage the device and consequently void the warranty. The following flow chart shows the proper Power Off procedure: Figure 6: Power Off Procedure Flow Chart Wake from Deep Sleep Mode The CMB100 supports Power Saving Mode (PSM) functionality defined in 3GPP Release 12.

  • Page 27: Emergency Shutdown: Em_Off

    CMB100 Hardware Design Guide Emergency Shutdown: EM_OFF EM_OFF input on connector pin 12 is used to unconditionally shut down the CMB100. Whenever this signal is pulled high, the CMB100 is reset, meaning CMB100 stops any operation. After the release of the line, the CMB100 is unconditionally shut down, without performing any disconnection from the network where it was registered right before shut down occured.

  • Page 28: Fast Shut Down

    CMB100 Hardware Design Guide Note: To avoid a back-powering effect it is recommended to • prevent any HIGH logic level signal from being applied to the digital pins of the CMB100 when the module is powered off or during an ON-OFF transition. No pull-down resistor on EM_OFF pin is needed: an •...

  • Page 29: Serial Port

    CMB100 Hardware Design Guide The USB_D_P and USB_D_N signals have a clock rate of 480 MHz, therefore signal traces should be routed carefully. Trace lengths, number of vias and capacitive loading should be minimized. The characteristic impedance value should be as close as possible to 90 ohms differential.

  • Page 30: General Purpose I/O

    CMB100 Hardware Design Guide A typical connection diagram with an application MCU is depicted below VDD = VIO APPLICATION MCU CMB100XX UART_TXD TXD_HOST UART_RXD RXD_HOST APPLICATION UART_RTS RTS_HOST APPLICATION UART_CTS CTS_HOST UART_DTR DTR_HOST UART_RING RING_HOST Figure 8: CMB100 UART connection Note: A minimum UART implementation is possible when software flow control is implemented: TXD and RXD lines are used.

  • Page 31: Using A Gpio As An Input

    CMB100 Hardware Design Guide The following table shows the available GPIOs on the CMB100: Table 16: CMB100 GPIOs PIN Signal Output Drive Strength Default State NOTE IO1_HOST I/O 1mA INPUT IO2_HOST I/O 1mA INPUT 6.9.1 Using a GPIO as an INPUT The GPIO pins, when used as inputs, can be connected to a digital output of another device and report its status, provided that this device has interface levels compatible with the VIO voltage level applied to connector pin 7.

  • Page 32: Nanosim Holder

    CMB100 Hardware Design Guide BOOT_HOST is internally connected to modem general purpose pin GPIO_03. An internal level converter make BOOT_HOST VIO voltage level compliant. Table 17: nRST_OUT and BOOT_HOST Information Signal Function Type Comment nRST_OUT Application MCU SW reset Open Collector BOOT_HOST Application MCU FORCE BOOT CMOS @VIO...

  • Page 33: Forced Usb Boot

    CMB100 Hardware Design Guide As previously state in the Note, no SIM interface signal: • SIMCLK • SIMRST • SIMVCC • SIMIO • SIMIN Is led to CMB100 interface connector CMB100 SIM circuitry supports both Class B (3V) and Class C (1V8) 4FF nano SIMs. It offers a 5 MHz max clock rate, as per 3GPP USIM specification.
  • Page 34 CMB100 Hardware Design Guide The FORCED_USB_BOOT input leakage current is very low, so a 10K pull up to 1.8V can be used to keep this pin in the HI state. Note: FORCED_USB_BOOT pin must be pullup-ed during firmware upgrade operation only. Leave it disconnected otherwise. 1VV0301975 Rev.2 Page 34 of 63 2024-11-19...

  • Page 35: Rf Section

    CMB100 Hardware Design Guide RF Section Bands Variants Table 18: Bands Variant Product Bands CMB100A0 B1,B2,B3,B4,B5,B7,B8,B9,B12,B13,B14,B18,B19,B20,B25,B26,B28,GSM850, GSM900, DCS1800, PCS1900 CMB100B0 B1,B2,B3,B4,B5,B7,B8,B12,B13,B18,B19,B20,B25,B26,B28,B66,B34,B38,B39,B40,B41 CMB100C0 B1,B2,B3,B4,B5,B8,B12,B13,B18,B19,B20,B25,B26,B27,B28,B66,B71,B85,B86 ,B8_39d ,GSM 850, GSM900, DCS1800, PCS1900 B85 and B8_39d are not 3GPP bands TX Output Power Table 19: CMB100A0 TX Output Power Band Mode Class...

  • Page 36: Rx Sensitivity

    CMB100 Hardware Design Guide RX Sensitivity Measurement setup Table 22: CMB100x0 RX Sensitivity Measurement Setup Mode Value (LTE) CAT M1 Throughput >95%, According to 3GPP 36.521-1 (LTE) CAT NB1 Throughput >95%, According to 3GPP 36.521-1 GPRS BLER <10%, CS2, According to 3GPP 51.010-1 Main Antenna Requirements The Main antenna connection (see MAIN U.FL connector on CMB100) is the most important aspect of the full product design as it strongly affect the general performance...

  • Page 37: Antenna Installation Guidelines

    CMB100 Hardware Design Guide 7.4.1 Antenna Installation Guidelines Install the antenna in a place covered by the LTE signal with CAT-M1 support. • The Antenna must not be installed inside metal cases. • The Antenna must be installed according to the Antenna manufacturer's •...

  • Page 38: Gnss Section

    CMB100 Hardware Design Guide GNSS Section CMB100(A0,B1,C0,D0) includes a state-of-art receiver that can simultaneously search and track satellite signals from multiple satellite constellations. This multi-GNSS receiver uses the entire spectrum of GNSS systems available: GPS, GLONASS, BeiDou, Galileo and QZSS. GNSS U.FL input and 3.1V LDO CMB100 provides a GNSS input (see GNSS U.FL connector on CMB100).

  • Page 39: Gnss Antenna Specification

    CMB100 Hardware Design Guide 8.2.1 GNSS Antenna Specification Table 24: GNSS Antenna specification Item Value Frequency range 1559.0 ~ 1610.0 MHz Gain 15 ~ 30dB Impedance 50 hm Noise Figure of LNA < 1.5 (recommended) DC supply voltage DC 3.1V VSWR ≤...

  • Page 40: Mechanical Design

    CMB100 Hardware Design Guide Mechanical Design Enclosure The CMB100 should not come into direct contact with any corrosive liquids or water. It should be housed in a protective enclosure to safeguard it from any exposure. The housing should also provide a mechanism to capture the SIM card. If this is not possible then an alternate method of securing the SIM card is recommended to keep it from jarring free when exposed to shock or vibration.
  • Page 41 CMB100 Hardware Design Guide Figure 13: example of application board (DEV KIT) with screws 1VV0301975 Rev.2 Page 41 of 63 2024-11-19...
  • Page 42 CMB100 Hardware Design Guide Figure 14: suggested connectors pairing (0600-0300-L-G from GCT (CMB100100); 2MM-R-D10-VT-01-F-TBP (Application Board) ) 1VV0301975 Rev.2 Page 42 of 63 2024-11-19...
  • Page 43 CMB100 Hardware Design Guide Figure 15: CMB100 Mechanical Drawing TOP VIEW 1VV0301975 Rev.2 Page 43 of 63 2024-11-19...
  • Page 44 CMB100 Hardware Design Guide Figure 16: CMB100 Mechanical Drawing BOTTOM VIEW Figure 17: CMB100 Mechanical Drawing SIDE VIEW 1VV0301975 Rev.2 Page 44 of 63 2024-11-19...
  • Page 45 CMB100 Hardware Design Guide Figure 18: CMB100 Mechanical Drawing SIDE VIEW 1VV0301975 Rev.2 Page 45 of 63 2024-11-19...
  • Page 46 CMB100 Hardware Design Guide Figure 19: Recommended Footprint 1VV0301975 Rev.2 Page 46 of 63 2024-11-19...

  • Page 47: Host Connector And Fasteners Packaging

    CMB100 Hardware Design Guide Packaging 10.1 Tray The CMB100 modules are packaged on trays that can be used in SMT processes for pick & place handling. The mass production units of CMB100 will be shipped according to the following drawings: Figure 20: Tray Packaging 1VV0301975 Rev.2 Page 47 of 63...
  • Page 48 CMB100 Hardware Design Guide Figure 21: Tray Dimensions 1VV0301975 Rev.2 Page 48 of 63 2024-11-19...

  • Page 49: Conformity Assessment Issues

    CMB100 Hardware Design Guide Conformity Assessment Issues 11.1 Approvals Compliance Summary Table 26: EMEA Compliance Summary Region EMEA Country & Type Approval UKCA CMB100A0-WW CMB100B0-WW CMB100C0-WW Table 27: Americas Compliance Summary Region Americas Country & Type Approval ISED CMB100A0-WW CMB100B0-WW CMB100C0-WW The equipment is compliant Type approval is in progress...

  • Page 50: Red Antennas

    CMB100 Hardware Design Guide 11.2.1.2 RED Antennas This radio transmitter has been approved under RED to operate with the antenna types listed below with the maximum permissible gain indicated. The usage of a different antenna in the final hosting device may need a new assessment of host conformity to RED. Table 28: Antenna Type used for RED module type approval Model Antenna Type...

  • Page 51: Ca Antennas

    CMB100 Hardware Design Guide 11.2.2.2 UK CA Antennas This radio transmitter has been approved under UK CA to operate with the antenna types listed below with the maximum permissible gain indicated. The usage of a different antenna in the final hosting device may need a new assessment of host conformity to UK Table 30: Antenna Type used for UKCA module type approval Model Antenna Type...

  • Page 52: Applicable Fcc Rules

    CMB100 Hardware Design Guide 11.4.1.2 Applicable FCC rules Table 32 Applicable FCC and ISED rules Model Modèle Applicable FCC Rules CMB100A0-WW 47 CFR Part 2, 22, 24, 27, 90 CMB100B0-WW 47 CFR Part 2, 22, 24, 27, 90 CMB100C0-WW 47 CFR Part 2, 22, 24, 27, 90 11.4.1.3 FCC Regulatory notices INTEGRATION INSTRUCTIONS...
  • Page 53 CMB100 Hardware Design Guide equipment generates, uses, and can radiate radio frequency energy and, if not installed and used per the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.

  • Page 54: Fcc Antenna Info

    CMB100 Hardware Design Guide As long as all conditions above are met, further transmitter test will not be required. However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed. IMPORTANT NOTE: Note: In the event that these conditions can not be met (for example co-...

  • Page 55: Labelling Requirements For The Host Device

    CMB100 Hardware Design Guide Table 34 Maximum antenna gain for FCC (dBi) to meet ERP limits Max Gain for FCC to meet MPE limits (dBi) Band CMB100A0-WW CMB100B0-WW CMB100C0-WW GSM 850 3.62 GSM 1900 8.51 GPRS/EGPRS 850 3.62 GPRS/EGPRS 1900 8.51 FDD 2 8.51...

  • Page 56: Canada Ised

    CMB100 Hardware Design Guide 11.5 Canada ISED 11.5.1.1 ISED Database The products ISED certified can be found here: Les produits certifiés ISED peuvent être trouvés ici : https://sms- sgs.ic.gc.ca/equipmentSearch/searchRadioEquipments?execution=e1s1&lang=en 11.5.1.2 Applicable ISED Rules Table 36 Applicable FCC and ISED rules Model Modèle Applicable ISED Rules Règles ISDE applicables...
  • Page 57 CMB100 Hardware Design Guide Radio Exposure Notice / Avis d’exposition radio This device complies with ISED radiation exposure limits set forth for an uncontrolled environment and meets the RSS‐102 of the ISED radio frequency (RF) Exposure rules. Antenna gain must be less than the values reported in the table below: Le present appareil est conforme à...
  • Page 58 CMB100 Hardware Design Guide séparation d'au moins 20 cm de toutes les personnes et ne doivent pas être co-localisées ou fonctionner en conjonction avec toute autre antenne ou émetteur. Les utilisateurs finaux et les installateurs doivent recevoir les instructions d'installation de l'antenne et envisager de supprimer la déclaration de non-collocation.

  • Page 59: Labelling Requirements For The Host Device / Exigences D'étiquetage Pour Le Périphérique Hôte

    CMB100 Hardware Design Guide 11.5.1.4 Labelling requirements for the host device / Exigences d'étiquetage pour le périphérique hôte The host device shall be properly labelled to identify the modules within the host device. The certification label of the module shall be clearly visible at all times when installed in the host device, otherwise the host device must be labelled to display the IC of the module, preceded by the words "Contains transmitter module", or the word "Contains", or similar wording expressing the same meaning, as in the following table.

  • Page 60: Acronyms And Abbreviations

    CMB100 Hardware Design Guide Acronyms and Abbreviations Table 40: Acronyms and Abbreviation Acronym Definition TTSC Telit Technical Support Centre Universal Serial Bus High Speed Data Terminal Equipment UMTS Universal Mobile Telecommunication System WCDMA Wideband Code Division Multiple Access HSDPA High Speed Downlink Packet Access HSUPA High Speed Uplink Packet Access UART...

  • Page 61: Related Documents

    CMB100 Hardware Design Guide Related Documents For current documentation and downloads, refer to https://dz.telit.com/. Table 41: Related Documents S.no Doc Code Document Title 1VV0301974 CMB100 Quick Start Guide 1VV0301976 CMB100 Video Guide 1VV0301975 Rev.2 Page 61 of 63 2024-11-19...

  • Page 62: Document History

    CMB100 Hardware Design Guide Document History Table 42: Document History Revision Date Changes 2024-06-21 Initial release 2024-07-15 Preliminary release 2024-11-19 First review added SIM holder description From Mod.0818 Rev.15 1VV0301975 Rev.2 Page 62 of 63 2024-11-19...

  • Page 63: Technical Documentation

    © Telit Cinterion. All rights reserved. Technical Documentation...

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