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Quectel BC66 Hardware Design

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BC66
Hardware Design
NB-IoT Module Series
Rev. BC66_Hardware_Design_V1.1
Date: 2018-11-14
Status: Released
www.quectel.com

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Summary of Contents for Quectel BC66

  • Page 1 BC66 Hardware Design NB-IoT Module Series Rev. BC66_Hardware_Design_V1.1 Date: 2018-11-14 Status: Released www.quectel.com...
  • Page 2 QUECTEL OFFERS THE INFORMATION AS A SERVICE TO ITS CUSTOMERS. THE INFORMATION PROVIDED IS BASED UPON CUSTOMERS’ REQUIREMENTS. QUECTEL MAKES EVERY EFFORT TO ENSURE THE QUALITY OF THE INFORMATION IT MAKES AVAILABLE. QUECTEL DOES NOT MAKE ANY WARRANTY AS TO THE INFORMATION CONTAINED HEREIN, AND DOES NOT ACCEPT ANY LIABILITY FOR ANY INJURY, LOSS OR DAMAGE OF ANY KIND INCURRED BY USE OF OR RELIANCE UPON THE INFORMATION.

  • Page 3: About The Document

    NB-IoT Module Series BC66 Hardware Design About the Document History Revision Date Author Description Speed SUN/ 2018-08-24 Initial Newgate HUA Updated supported bands and involved RF parameters of 2018-11-14 Newgate HUA BC66. BC66_Hardware_Design 2 / 57...

  • Page 4: Table Of Contents

    NB-IoT Module Series BC66 Hardware Design Contents About the Document ........................... 2 Contents ............................... 3 Table Index ..............................5 Figure Index ..............................6 Introduction ............................7 1.1. Safety Information ........................8 Product Concept ..........................9 2.1. General Description ........................9 2.2.
  • Page 5 NB-IoT Module Series BC66 Hardware Design 4.5. Antenna Requirements ......................38 4.6. RF Output Power ........................39 4.7. RF Receiving Sensitivity ......................40 4.8. Recommended RF Connector for Antenna Installation ............41 Electrical and Reliability Characteristics ..................43 5.1. Operation and Storage Temperatures ..................43 5.2.
  • Page 6 NB-IoT Module Series BC66 Hardware Design Table Index TABLE 1: FREQUENCY BANDS OF BC66 MODULE ..................9 TABLE 2: BC66 KEY FEATURES ........................10 TABLE 3: I/O PARAMETERS DEFINITION ....................... 15 TABLE 4: PIN DESCRIPTION ........................... 15 TABLE 5: OVERVIEW OF OPERATING MODES ..................... 18 TABLE 6: POWER SUPPLY PINS ........................
  • Page 7 NB-IoT Module Series BC66 Hardware Design Figure Index FIGURE 1: FUNCTIONAL DIAGRAM ....................... 12 FIGURE 2: PIN ASSIGNMENT ......................... 14 FIGURE 3: MODULE POWER CONSUMPTION IN DIFFERENT MODES ............19 FIGURE 4: TIMING OF WAKING UP MODULE FROM PSM ................20 FIGURE 5: REFERENCE CIRCUIT FOR POWER SUPPLY ................

  • Page 8: Introduction

    NB-IoT Module Series BC66 Hardware Design Introduction This document defines the BC66 module and describes its air interface and hardware interface which are connected with the customers’ applications. This document can help customers quickly understand module interface specifications, electrical and mechanical details, as well as other related information of the module.

  • Page 9: Safety Information

    The following safety precautions must be observed during all phases of the operation, such as usage, service or repair of any cellular terminal or mobile incorporating BC66 module. Manufacturers of the cellular terminal should send the following safety information to users and operating personnel, and incorporate these guidelines into all manuals supplied with the product.

  • Page 10: Product Concept

    BC66 H-FDD B1/B2/B3/B4/B5/B8/B12/B13/B17/B18/B19/B20/B25/B26*/B28/B66 BC66 is an SMD type module with LCC package, and has an ultra-compact profile of 17.7mm × 15.8mm × 2.0mm. These make it can be easily embedded into size-constrained applications and provide reliable connectivity with the applications.

  • Page 11: Key Features

    NB-IoT Module Series BC66 Hardware Design 2.2. Key Features The following table describes the detailed features of BC66 module. Table 2: BC66 Key Features Feature Details  Supply voltage: 2.1V ~ 3.63V Power Supply  Typical supply voltage: 3.3V ...

  • Page 12: Functional Diagram

    When the temperature returns to normal operation temperature levels, the module will meet 3GPP specifications again. "*" means under development. 2.3. Functional Diagram The following figure shows a block diagram of BC66 and illustrates the major functional parts.  Radio frequency ...

  • Page 13: Development Board

    “*” means under development. 2.4. Development Board Quectel provides a complete set of development tools to facilitate the use and testing of BC66 module. The development tool kit includes the TE-B board, USB cable, antenna and other peripherals. For more details, please refer to document [1].

  • Page 14: Application Interfaces

    NB-IoT Module Series BC66 Hardware Design Application Interfaces 3.1. General Description BC66 is equipped with a total of 58 pins, including 44 LCC pins and 14 LGA pins. The subsequent chapters will provide detailed descriptions of the following functions/pins/interfaces:  ...

  • Page 15: Pin Assignment

    NB-IoT Module Series BC66 Hardware Design 3.2. Pin Assignment RF_ANT RESERVED SPI_MISO* RESERVED SPI_MOSI* RESERVED SPI_SCLK* RESERVED SPI_CS* BC66 RESERVED Top View PWRKEY TXD_AUX RXD_AUX RESERVED ADC0* SIM_GND RESERVED SIM_DATA RESERVED SIM_RST VDD_EXT SIM_CLK RESERVED POWER UART USIM OTHERS RESERVED...

  • Page 16: Pin Description

    NB-IoT Module Series BC66 Hardware Design 3.3. Pin Description Table 3: I/O Parameters Definition Type Description Bidirectional Digital input Digital output Power input Power output Analog input Analog output Table 4: Pin Description Power Supply Pin Name Pin No. Description...
  • Page 17 NB-IoT Module Series BC66 Hardware Design Power Key Interface Pin Name Pin No. Description DC Characteristics Comment Pull down max=0.3*VBAT PWRKEY PWRKEY to turn min=0.7*VBAT on the module Reset Interface Pin Name Pin No. Description DC Characteristics Comment RESET Reset the module Active low.
  • Page 18 NB-IoT Module Series BC66 Hardware Design Pin Name Pin No. Description DC Characteristics Comment RXD_AUX Receive data 1.8V power domain. TXD_AUX DO Transmit data Debug UART Port Pin Name Pin No. Description DC Characteristics Comment RXD_DBG Receive data 1.8V power domain.

  • Page 19: Operating Modes

    NB-IoT Module Series BC66 Hardware Design Master input SPI_MISO* slave output of SPI interface Master output SPI_MOSI* slave input of SPI interface 1.8V power domain. Serial clock SPI_SCLK* signal of SPI interface Chip select of SPI_CS* SPI interface Reserved Pins Pin Name Pin No.

  • Page 20: Power Saving Mode (Psm)

    NB-IoT Module Series BC66 Hardware Design In PSM, only the 32kHz RTC is working, and the network is disconnected. The module will exit from PSM and enter into active mode when the timer T3412 times out, and it can also be woken up from PSM by PSM_EINT.

  • Page 21: Power Supply

    PSM. The module cannot be woken up by any other general purpose GPIO interrupts. 3.6. Power Supply 3.6.1. Power Supply Pins BC66 provides two VBAT pins for connection with an external power supply. The table below describes the module's VBAT and ground pins. Table 6: Power Supply Pins Pin Name Pin No.

  • Page 22: Reference Design For Power Supply

    Figure 5: Reference Circuit for Power Supply 3.7. Power up/Power down Scenarios 3.7.1. Turn on BC66 will be powered up after driving the PWRKEY pin to a low level voltage for at least 500ms. Table 7: PWRKEY Pin Pin Name Pin No.
  • Page 23 NB-IoT Module Series BC66 Hardware Design It is recommended use an open drain/collector driver to control the PWRKEY. A simple reference circuit is illustrated in the following figure. PWRKEY 4.7K Turn on pulse Figure 6: Turn on the Module Using Driving Circuit Another way to control the PWRKEY is using a button directly.

  • Page 24: Turn Off

    NOTE PWRKEY cannot be pulled down all the time, otherwise the module will not be able to enter into PSM. 3.7.2. Turn off BC66 can be powered off though any of the following methods:  Power off by AT+QPOWD=0. ...

  • Page 25: Reset The Module

    NB-IoT Module Series BC66 Hardware Design 3.7.3. Reset the Module Driving the RESET pin to a low level voltage for at least 50ms will reset the module. Table 8: Reset Pin Pin Name Pin No. Description Reset Pull-down Time Reset the module.

  • Page 26: Uart Interfaces

    NB-IoT Module Series BC66 Hardware Design VBAT ≥50ms 20ms RESET VDD_EXT · · · · · · · · · · · · Module Running Resetting Restart Status Figure 13: Reset Timing 3.8. UART Interfaces The module provides three UART ports: main UART port, debug UART port and auxiliary UART port. The module is designed as DCE (Data Communication Equipment), following the traditional DCE-DTE (Data Terminal Equipment) connection.

  • Page 27: Main Uart Port

    NB-IoT Module Series BC66 Hardware Design NOTE “*” means under development. 3.8.1. Main UART Port The main UART port supports AT command communication, data transmission and firmware upgrade.  By default, the module is in auto-baud mode and it supports automatic baud rates not exceeding 115200bps.

  • Page 28: Auxiliary Uart Port

    NB-IoT Module Series BC66 Hardware Design Module TXD_DBG RXD_DBG Figure 15: Reference Design of Debug UART Port 3.8.3. Auxiliary UART Port The auxiliary UART port is designed as a general purpose UART for communication with DTE. It also supports log output for firmware debugging, and hardware flow control*. Its baud rate is 115200bps by default.
  • Page 29 NB-IoT Module Series BC66 Hardware Design Module VDD_EXT VCCA VCCB 0.1uF 0.1uF Translator RXD_DBG TXD_DBG TXD_DBG RXD_DBG RXD_AUX TXD_AUX TXD_AUX RXD_AUX GPIO Figure 17: Reference Circuit with Voltage Level Translator Chip Another example with transistor translation circuit is shown as below. The circuit design of dotted line section can refer to the design of solid line section, in terms of both module input and output circuit designs, but please pay attention to the direction of connection.

  • Page 30: Spi Interface

    ” represents the test point of UART interfaces. It is also recommended to reserve the test points of VBAT and PWRKEY, for convenient firmware upgrade and debugging when necessary. “*” means under development. 3.9. SPI Interface BC66 provides one SPI master interface. The following table shows the pin definition of SPI interface. BC66_Hardware_Design 29 / 57...

  • Page 31: Usim Interface

    NB-IoT Module Series BC66 Hardware Design Table 10: Pin Definition of SPI Interface Pin Name Pin No. Description Comment SPI_MISO Master input slave output of SPI interface SPI_MOSI Master output slave input of SPI interface 1.8V power domain SPI_SCLK Clock signal of SPI interface...
  • Page 32 NB-IoT Module Series BC66 Hardware Design Table 11: Pin Definition of USIM Interface Pin Name Pin No. Description Comment Voltage accuracy: 1.8V± 5%. SIM_VDD Power supply for USIM card Maximum supply current: about 60mA. SIM_CLK Clock signal of USIM card...

  • Page 33: Adc Interface

    NB-IoT Module Series BC66 Hardware Design  In order to offer good ESD protection, it is recommended to add a TVS diode array. For more information of TVS diode, please visit http://www.onsemi.com. The ESD protection device should be placed as close to USIM card connector as possible, and make sure the USIM card signal lines go through the ESD protection device first and then to the module.
  • Page 34 NB-IoT Module Series BC66 Hardware Design VBAT Module 2.2K 4.7K NETLIGHT Figure 22: Reference Design for NETLIGHT NOTE “*” means under development. BC66_Hardware_Design 33 / 57...

  • Page 35: Antenna Interface

    NB-IoT Module Series BC66 Hardware Design Antenna Interface The pin 35 is the RF antenna pad. The antenna port has an impedance of 50Ω. 4.1. Pin Definition Table 13: Pin Definition of NB-IoT Antenna Interface Pin Name Pin No. Description...

  • Page 36: Rf Antenna Reference Design

    50Ω.  BC66 comes with ground pads which are next to the antenna pad in order to give a better grounding.  In order to achieve better RF performance, it is recommended to reserve a π type matching circuit and place the π-type matching components (R1/C1/C2) as close to the antenna as possible.

  • Page 37: Reference Design Of Rf Layout

    NB-IoT Module Series BC66 Hardware Design A reference design of the RF interface is shown as below. R1 0R RF_ANT Module Figure 23: Reference Design of NB-IoT Antenna Interface 4.4. Reference Design of RF Layout For user’s PCB, the characteristic impedance of all RF traces should be controlled as 50Ω. The impedance of the RF traces is usually determined by the trace width (W), the materials’...
  • Page 38 NB-IoT Module Series BC66 Hardware Design Figure 25: Coplanar Waveguide Line Design on a 2-layer PCB Figure 26: Coplanar Waveguide Line Design on a 4-layer PCB (Layer 3 as Reference Ground) Figure 27: Coplanar Waveguide Line Design on a 4-layer PCB (Layer 4 as Reference Ground)

  • Page 39: Antenna Requirements

    NB-IoT Module Series BC66 Hardware Design  Use impedance simulation tool to control the characteristic impedance of RF traces as 50Ω.  The GND pins adjacent to RF pins should not be designed as thermal relief pads, and should be fully connected to ground.

  • Page 40: Rf Output Power

    NB-IoT Module Series BC66 Hardware Design Input Impedance (Ω) 4.6. RF Output Power Table 17: RF Conducted Output Power Frequency Band Max. Min. 23dBm± 2dB <-39dBm 23dBm± 2dB <-39dBm 23dBm± 2dB <-39dBm 23dBm± 2dB <-39dBm 23dBm± 2dB <-39dBm 23dBm± 2dB <-39dBm...

  • Page 41: Rf Receiving Sensitivity

    NB-IoT Module Series BC66 Hardware Design 4.7. RF Receiving Sensitivity Table 18: Receiving Sensitivity (with RF Retransmissions) Frequency Band Receiving Sensitivity -129dBm -129dBm -129dBm -129dBm -129dBm -129dBm -129dBm -129dBm -129dBm -129dBm -129dBm -129dBm -129dBm B26* -129dBm -129dBm NOTE “*” means under development.

  • Page 42: Recommended Rf Connector For Antenna Installation

    NB-IoT Module Series BC66 Hardware Design 4.8. Recommended RF Connector for Antenna Installation If RF connector is used for antenna connection, it is recommended to use the U.FL-R-SMT connector provided by HIROSE. Figure 28: Dimensions of the U.FL-R-SMT Connector (Unit: mm) U.FL-LP serial connectors listed in the following figure can be used to match the U.FL-R-SMT.
  • Page 43 NB-IoT Module Series BC66 Hardware Design The following figure describes the space factor of mated connector. Figure 30: Space Factor of Mated Connector (Unit: mm) For more details, please visit http://www.hirose.com. BC66_Hardware_Design 42 / 57...

  • Page 44: Electrical And Reliability Characteristics

    When the temperature returns to normal operation temperature levels, the module will meet 3GPP specifications again. 5.2. Current Consumption The table below lists the current consumption of BC66 under different states. BC66_Hardware_Design 43 / 57...
  • Page 45 NB-IoT Module Series BC66 Hardware Design Table 20: Module Current Consumption Parameter Mode Description Min. Typ. Max. Unit μA Sleep mode eDRX=81.92s, PTW=40.96s µA μA Idle @DRX=1.28s μA @DRX=2.56s B1 @23dBm B2 @23dBm B3 @23dBm B4 @23dBm B5 @23dBm B8 @23dBm...

  • Page 46: Electrostatic Discharge

    NB-IoT Module Series BC66 Hardware Design Parameter Mode Description Min. Typ. Max. Unit B4 @23dBm B5 @23dBm B8 @23dBm B12 @23dBm B13 @23dBm B17 @23dBm B18 @23dBm B19 @23dBm B20 @23dBm B25 @23dBm B26* @23dBm B28 @23dBm B66 @23dBm NOTES Current consumption under instrument test condition.
  • Page 47 NB-IoT Module Series BC66 Hardware Design Table 21: Electrostatic Discharge Characteristics (25º C, 45% Relative Humidity) Test Contact Discharge Air Discharge Unit VBAT, GND ± 5 ± 10 Antenna interface ± 5 ± 10 Other interfaces ± 0.5 ± 1...

  • Page 48: Mechanical Dimensions

    This chapter describes the mechanical dimensions of the module. All dimensions are measured in millimetre (mm), and the tolerances for dimensions without tolerance values are ± 0.05mm. 6.1. Mechanical Dimensions of the Module Figure 31: BC66 Top and Side Dimensions (Unit: mm) BC66_Hardware_Design 47 / 57...
  • Page 49 NB-IoT Module Series BC66 Hardware Design Figure 32: Module Bottom Dimension (Bottom View) BC66_Hardware_Design 48 / 57...

  • Page 50: Recommended Footprint

    NB-IoT Module Series BC66 Hardware Design 6.2. Recommended Footprint Figure 33: Recommended Footprint (Unit: mm) NOTE The module should be kept about 3mm away from other components on the host PCB. BC66_Hardware_Design 49 / 57...

  • Page 51: Top And Bottom Views Of The Module

    Figure 31: Top View of the Module Figure 32: Bottom View of the Module NOTE These are renderings of BC66 module. For authentic dimension and appearance, please refer to the module that you receive from Quectel. BC66_Hardware_Design 50 / 57...

  • Page 52: Storage, Manufacturing And Packaging

    Storage, Manufacturing and Packaging 7.1. Storage BC66 module is stored in a vacuum-sealed bag. It is rated at MSL 3, and storage restrictions are shown as below. 1. Shelf life in the vacuum-sealed bag: 12 months at <40º C/90%RH. 2. After the vacuum-sealed bag is opened, devices that will be subjected to reflow soldering or other high temperature processes must be: ...

  • Page 53: Manufacturing And Soldering

    NB-IoT Module Series BC66 Hardware Design 7.2. Manufacturing and Soldering Push the squeegee to apply the solder paste on the surface of stencil, thus making the paste fill the stencil openings and then penetrate to the PCB. The force on the squeegee should be adjusted properly so as to produce a clean stencil surface on a single pass.

  • Page 54: Packaging

    NB-IoT Module Series BC66 Hardware Design Reflow Zone Max slope 2 to 3° C/sec Reflow time (D: over 220° C) 40 to 60 sec Max temperature 240° C ~ 245° C Cooling down slope 1 to 4° C/sec Reflow Cycle...
  • Page 55 NB-IoT Module Series BC66 Hardware Design Figure 33: Tape Dimensions (Unit: mm) Figure 34: Reel Dimensions (Unit: mm) BC66_Hardware_Design 54 / 57...

  • Page 56: Appendix A References

    Table 23: Related Documents Document Name Remark Quectel_BC66-TE-B_User_Guide BC66-TE-B User Guide Quectel_RF_Layout_Application_Note RF Layout Application Note Quectel_BC66_AT_Commands_Manual BC66 AT Commands Manual Quectel_Module_Secondary_SMT_User_Guide Module Secondary SMT User Guide Table 24: Terms and Abbreviations Abbreviation Description Analog-to-Digital Converter CoAP Constrained Application Protocol...
  • Page 57 NB-IoT Module Series BC66 Hardware Design kbps Kilo Bits Per Second Light Emitting Diode Li-MnO2 Lithium-manganese Dioxide Li-2S Lithium Sulfur Long Term Evolution LwM2M Lightweight M2M MQTT Message Queuing Telemetry Transport NB-IoT arrow Band- Internet of Things Printed Circuit Board...
  • Page 58 NB-IoT Module Series BC66 Hardware Design Vmax Maximum Voltage Value Vnorm Normal Voltage Value Vmin Minimum Voltage Value Maximum Input High Level Voltage Value Minimum Input High Level Voltage Value Maximum Input Low Level Voltage Value Minimum Input Low Level Voltage Value...

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