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NB-IoT

Module Series

BC660K-GL Hardware Design

BC660K-GL_Hardware_Design 28 / 57

DTE

TXD

RXD

GND

Module

DBG_TXD

DBG_RXD

GND

Figure 12: Reference Design for Debug UART Port

3.7.3. UART Application

The serial port voltage domain of this module is optional. Customers can select the appropriate voltage

domain through VIO_SEL according to actual situation. When VIO_SEL is floating, the VDD_EXT voltage

domain is 1.8 V; when VIO_SEL is grounded, the VDD_EXT voltage domain is 3.3 V or equals the VBAT

voltage

If the voltage domain of your application system is 1.8 V, VIO_SEL can be floating; If the voltage domain

of your application system is 3.3 V, VIO_SEL must be grounded.

The following figure shows the reference design of UART:

VDD_EXT

MAIN_TXD

DBG_TXD

MAIN_RXD

GPIO

RXD_DTE

TXD_DTE

RXD_DBG

VDD

DBG_RXD

TXD_DBG

Module

DTE

GND

VIO_SEL

1 k

VDD_EXT

VDD_DTE

RESET_N

GND

BOOT

VBAT

RESET_N

MAIN_RXD MAIN_TXD

TEST POINTS

Figure 13: Reference Design for UART

The following circuit shows a reference design for the communication between the module and a PC with

a standard RS-232 interface. Make sure to select appropriate voltage domain through VIO_SEL

Содержание BC660K-GL

Страница 1: ...BC660K GL Hardware Design NB IoT Module Series Version 1 0 Date 2021 01 12 Status Released www quectel com...

Страница 2: ...or notice Disclaimer While Quectel has made efforts to ensure that the functions and features under development are free from errors it is possible that these functions and features could contain erro...

Страница 3: ...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...

Страница 4: ...may cause interference on sensitive medical equipment so please be aware of the restrictions on the use of wireless devices when in hospitals clinics or other healthcare facilities Cellular terminals...

Страница 5: ...ign BC660K GL_Hardware_Design 4 57 About the Document Revision History Version Date Author Description 2020 09 30 Clifton HE Ellison WANG Randy LI Creation of the document 1 0 2021 01 12 Clifton HE El...

Страница 6: ...Operating Modes 19 3 4 Power Saving 20 3 4 1 Light Sleep 20 3 4 2 Deep Sleep 21 3 5 Power Supply 22 3 5 1 Power Supply Pins 22 3 5 2 Power Supply Reference Design 22 3 5 3 Power Supply Voltage Detect...

Страница 7: ...8 Recommended RF Connector for Antenna Installation 41 5 Reliability and Electrical Characteristics 43 5 1 Operating and Storage Temperatures 43 5 2 Current Consumption 43 5 3 Electrostatic Discharge...

Страница 8: ...able 14 Pin Definition of RI Interface 32 Table 15 RI Signal Status 33 Table 16 Pin Definition of GPIO Interfaces 33 Table 17 Pin Definition of GRFC Interfaces 34 Table 18 Pin Definition of NETLIGHT I...

Страница 9: ...r Level Conversion Circuit 30 Figure 16 Reference Design for USIM Interface with a 6 pin USIM Card Connector 31 Figure 17 RI Behaviour When a URC Message is Received 33 Figure 18 Reference Design for...

Страница 10: ...specifications as well as electrical and mechanical details of the BC660K GL module Consult this document to learn about the air interface hardware interface external application reference designs and...

Страница 11: ...and provide reliable connectivity with the applications BC660K GL provides abundant external interfaces UART ADC USIM etc and protocol stacks UDP TCP LwM2M MQTT etc which facilitates the module s appl...

Страница 12: ...e is 115200 bps by default For more details see Chapter 3 7 1 Used for firmware upgrade where the baud rate is 921600 bps by default Debug UART Port Used for debugging Default baud rate 6 Mbps Network...

Страница 13: ...one or more specifications such as Pout may exceed the specified tolerances of 3GPP When the temperature returns to the normal operating temperature levels the module will meet 3GPP specifications aga...

Страница 14: ...EINT USIM BOOT DBG_UART USIM VBAT VDD_EXT eSIM RI Switch LB TX LPM LB TX HPM HB TX LPM HB TX HPM HB RX LB RX GPIOs GRFC VIO_SEL Figure 1 Functional Diagram 2 4 Evaluation Board Quectel provides a comp...

Страница 15: ...equipped with 58 pins including 44 LCC pins and 14 LGA pins The subsequent chapters provide detailed descriptions of the following functions pins interfaces Power Supply PSM_EINT RESET_N BOOT UART In...

Страница 16: ...RESERVED RESERVED GND RESERVED RESERVED VDD_EXT RESERVED RESERVED RI PSM_EINT MAIN_RXD MAIN_TXD NETLIGHT RESET_N USIM_VDD VBAT Power GND UART USIM ANT RESERVED 45 46 47 48 49 50 51 52 53 54 55 56 57...

Страница 17: ...nt VBAT 42 43 PI Power supply for the module Vmax 4 3 V Vmin 2 2 V Vnom 3 3 V VDD_EXT 24 PO 1 8 3 3 V output power supply Controlled by VIO_SEL 1 8 V default Vnom 1 8 3 3 V No voltage output in Deep S...

Страница 18: ...on falling edge Network Status Indication Pin Name Pin No I O Description DC Characteristics Comment NETLIGHT 16 DO Indicate the module s network activity status VOLmax 0 15 VDD_EXT VOHmin 0 8 VDD_EX...

Страница 19: ...card clock VOLmax 0 15 USIM_VDD VOHmin 0 8 USIM_VDD USIM_RST 12 DO USIM card reset VOLmax 0 15 USIM_VDD VOHmin 0 8 USIM_VDD USIM_DATA 11 DIO USIM card data VILmax 0 2 USIM_VDD VIHmin 0 7 USIM_VDD VOL...

Страница 20: ...es of the module GPIO4 6 DIO General purpose input output GRFC Interfaces Pin Name Pin No I O Description DC Characteristics Comment GRFC1 54 DO Generic RF controller VOLmax 0 27 V VOHmin 1 44 V 1 8 V...

Страница 21: ...case the modem can switch to PSM or connected mode PSM In power saving mode the modem is disconnected from the network and cannot receive any downlink data In such a case the modem can switch to eDRX...

Страница 22: ...procedure of the modem entering PSM is as follows The modem requests to enable PSM with an ATTACH REQUEST or TAU REQUEST message during ATTACH or TAU Tracking Area Update procedure Then the network ac...

Страница 23: ...of 0 5 A to regulate the power supply for BC660K GL Lithium thionyl chloride Li SOCl2 batteries and Lithium manganese oxide LiMn2O4 batteries can be used as the power supply The supply voltage of the...

Страница 24: ...nce Design for Power Supply 3 5 3 Power Supply Voltage Detection You can use AT CBC to monitor and query the current VBAT voltage The unit of the voltage value is mV millivolt For detailed information...

Страница 25: ...the RESET_N pin can make the module reset so as to exit from the abnormal state 4 After VBAT is powered on RESET_N and BOOT automatically rise to high level due to internal pull ups 3 6 2 Turn Off Th...

Страница 26: ...RESET_N S1 Close to S1 TVS NM 100 nF Figure 9 Reference Design for RESET_N Controlled with a Button It is recommended to reserve a 100 nF capacitor position the capacitor is not mounted by default 3...

Страница 27: ...S1 TVS Figure 10 Reference Design for BOOT Controlled with a Button If the BOOT pin is connected to a filter capacitor in parallel the capacitance of the capacitor cannot be higher than 33 pF 3 7 UART...

Страница 28: ...ending AT commands through the main UART port It is recommended to keep sending the command AT until OK is returned before sending AT commands for other services The figure below shows the connection...

Страница 29: ...age1 If the voltage domain of your application system is 1 8 V VIO_SEL can be floating If the voltage domain of your application system is 3 3 V VIO_SEL must be grounded The following figure shows the...

Страница 30: ...ounted 2 represents the test points of UART interfaces It is recommended to reserve the test points of VBAT BOOT and RESET_N for convenient firmware upgrade and debugging when necessary 3 MAIN_RXD can...

Страница 31: ...bnormal wake up 2 If you apply the level conversion circuit don t mount the R1 marked in red 3 MAIN_RXD cannot be pulled up to VDD_EXT directly To pull up MAIN_RXD to VDD_EXT you need to connect a Sch...

Страница 32: ...the module and that of the USIM card connector short and wide and ensure the trace width no less than 0 5 mm avoid any decrease in electric potential The decoupling capacitor between USIM_VDD and GND...

Страница 33: ...nnector 3 9 ADC Interface The module provides a 12 bit ADC input channel to read the voltage value Table 13 Pin Definition of ADC Interface A 320 k pull down resistor is integrated inside the ADC pin...

Страница 34: ...a Figure 17 RI Behaviour When a URC Message is Received 3 11 GPIO Interfaces The module provides four general purpose input and output GPIO interfaces AT QCFG gpio command can be used to configure the...

Страница 35: ...eneric RF controller 1 8 V power domain If unused keep these pins open GRFC2 55 Generic RF controller 3 13 NETLIGHT Interface NETLIGHT can be used to indicate the network status of the module Table 18...

Страница 36: ...rface Pin Name Pin No Description ANT_RF 35 RF antenna interface GND 34 36 37 Ground 4 2 Operating Frequency Table 20 Module Operating Frequency Frequency Band Receiving Frequency Transmitting Frequen...

Страница 37: ...to reserve a type matching circuit and place the type matching components R1 C1 C2 as close to the antenna as possible By default the capacitors C1 C2 are not mounted and a 0 resistor is mounted on R...

Страница 38: ...nstant the height from the reference ground to the signal layer H and the clearance between RF traces and grounds S The microstrip or coplanar waveguide is typically used in RF layout to control chara...

Страница 39: ...urve ones There should be clearance under the signal pin of the antenna connector or solder joint The reference ground of RF traces should be complete Meanwhile adding some ground vias around RF trace...

Страница 40: ...ency Range 698 2200 MHz VSWR 2 Efficiency 30 Max Input Power W 50 Input Impedance 50 Frequency Band Max Min B1 23 dBm 2 dB 39 dBm B2 23 dBm 2 dB 39 dBm B3 23 dBm 2 dB 39 dBm B4 23 dBm 2 dB 39 dBm B5 2...

Страница 41: ...ency Band With RF Retransmission Without RF Retransmission B1 129 dBm 116 dBm B2 129 dBm 116 dBm B3 129 dBm 116 dBm B4 129 dBm 116 dBm B5 129 dBm 116 dBm B8 129 dBm 116 dBm B12 129 dBm 116 dBm B13 129...

Страница 42: ...m B28 129 dBm 116 dBm B66 129 dBm 116 dBm B70 129 dBm 116 dBm B85 129 dBm 116 dBm 4 8 Recommended RF Connector for Antenna Installation If RF connector is used for antenna connection it is recommended...

Страница 43: ...rial connectors listed in the following figure can be used to match the U FL R SMT Figure 25 Mechanicals of U FL LP Connectors The following figure describes the space factor of mated connectors Figur...

Страница 44: ...intains functions such as SMS and data transmission without any unrecoverable malfunction Radio spectrum and radio network will not be influenced while one or more specifications such as Pout may exce...

Страница 45: ...10 24 s ECL 0 38 A DRX 1 28 s 220 A DRX 2 56 s 110 A Active 1 AP Mode Modem Mode Min Typ Max 2 Unit Normal Single tone 15 kHz subcarrier spacing B1 23 4dBm 111 300 mA B2 22 5 dBm 108 305 mA B3 22 5 d...

Страница 46: ...276 mA B85 23 2 dBm 115 329 mA Single tone 3 75 kHz subcarrier spacing B1 23 2 dBm 240 311 mA B2 22 7 dBm 230 296 mA B3 22 8 dBm 213 274 mA B4 23 dBm 212 273 mA B5 22 9 dBm 202 263 mA B8 22 8 dBm 221...

Страница 47: ...ESD sensitive components Proper ESD handling and packaging procedures must be applied throughout the processing handling and operation of any application that incorporates the module The following ta...

Страница 48: ...hapter describes the mechanical dimensions of the module All dimensions are measured in millimeter mm and the dimensional tolerances are 0 05 mm unless otherwise specified 6 1 Mechanical Dimensions 17...

Страница 49: ...esign BC660K GL_Hardware_Design 48 57 3 7 0 7 1 1 17 7 15 8 4 4 1 5 3 5 1 0 4 35 4 3 1 8 1 9 2 25 4 4 0 15 0 15 0 7 Figure 28 Bottom Dimension Bottom View The package warpage level of the module confo...

Страница 50: ...0 0 35 1 1 10 14 23 36 4 35 1 00 1 00 17 70 0 15 20 00 0 15 15 80 0 15 18 10 0 15 1 00 2 50 0 35 4 30 1 80 1 80 0 35 6 10 6 15 Figure 29 Recommended Footprint Unit mm For easy maintenance of the modul...

Страница 51: ...50 57 6 3 Top and Bottom Views Figure 30 Top View of the Module Figure 31 Bottom View of the Module Images above are for illustration purpose only and may differ from the actual module For authentic a...

Страница 52: ...e module must be processed in reflow soldering or other high temperature operations within 168 hours Otherwise the module should be stored in an environment where the relative humidity is less than 10...

Страница 53: ...ush 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...

Страница 54: ...y identifiable and the QR code is still readable although white rust may be found 3 If a conformal coating is necessary for the module do NOT use any coating material that may chemically react with th...

Страница 55: ...NB IoT Module Series BC660K GL Hardware Design BC660K GL_Hardware_Design 54 57 Figure 33 Tape Dimensions Unit mm Figure 34 Reel Dimensions Unit mm...

Страница 56: ...sign BC660K GL Reference Design 4 Quectel_RF_Layout_Application_Note RF Layout Application Note 5 Quectel_Module_Secondary_SMT_User_Guide Module Secondary SMT User Guide Abbreviation Description ADC A...

Страница 57: ...LwM2M Lightweight M2M MQTT Message Queuing Telemetry Transport NB IoT Narrow Band Internet of Things OC Open Collector OD Open Drain PCB Printed Circuit Board PDN Public Data Network PDU Protocol Data...

Страница 58: ...nal Voltage Value Vmin Minimum Voltage Value VIHmax Maximum Input High Level Voltage Value VIHmin Minimum Input High Level Voltage Value VILmax Maximum Input Low Level Voltage Value VILmin Minimum Inp...

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