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N11

Hardware User Guide

Copyright © Neoway Technology Co., Ltd

38

7

Mounting N11 onto Application Board

N11 is introduced in 20-pin LGA package. This chapter describes N21 foot print, recommended PCB
design and SMT information to guide users how to mount the module onto application PCB board.

7.1

Bottom Dimensions

Figure 7-1

N11 bottom dimensions (Unit: mm)

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Summary of Contents for N11 Series

Page 1: ...N11 Hardware User Guide Issue 1 4 Date 2019 07 09 Neoway Product Document...

Page 2: ...NSTRUCTIONS FOR CUSTOMERS TO DESIGN THEIR APPLICATIONS PLEASE FOLLOW THE RULES AND PARAMETERS IN THIS GUIDE TO DESIGN AND COMMISSION NEOWAY WILL NOT TAKE ANY RESPONSIBILITY OF BODILY HURT OR ASSET LOS...

Page 3: ...NG Signal 21 3 4 SIM Card 22 3 5 LIGHT 23 3 6 RF Interface 24 3 6 1 RF Design and PCB Layout 24 3 6 2 Antenna Assembling 26 4 Electric Features and Reliability 28 4 1 Electric Feature 28 4 2 Temperatu...

Page 4: ...are User Guide Copyright Neoway Technology Co Ltd iii 7 1 Bottom Dimensions 38 7 2 Application Foot Print 39 7 3 Stencil 39 7 4 Solder Paste 39 7 5 SMT Profile 40 8 Safety Recommendations 42 9 Abbrevi...

Page 5: ...9 Signal connection between DCE and DTE 15 Figure 3 10 Level shifting circuit 1 16 Figure 3 11 Level shifting circuit 1 17 Figure 3 12 Recommended level shifting circuit 2 18 Figure 3 13 Process of en...

Page 6: ...v Figure 3 26 RF connections 27 Figure 6 1 N11 dimensions Unit mm 34 Figure 6 2 N11 label 35 Figure 6 3 N11 V2 label 35 Figure 7 1 N11 bottom dimensions Unit mm 38 Figure 7 2 Recommended PCB foot pri...

Page 7: ...ce 8 Table 3 2 UART 15 Table 3 3 DTR and RING pins 19 Table 3 4 SIM card interfaces 22 Table 3 5 LED indicator 23 Table 4 1 Electric feature of the module 28 Table 4 2 Temperature Feature 28 Table 4 3...

Page 8: ...ers SEs development engineers and test engineers Change History Issue Date Change Changed By 1 0 2018 03 Initial draft Wang Qiang 1 1 2018 03 Modified the signal Zhuo JianZheng 1 2 2018 09 Added N11 V...

Page 9: ...careful In this situation you might perform an action that could result in module or product damages Means note or tips for readers to use the module Related Documents Neoway_N11_Datasheet Neoway_N11...

Page 10: ...odule adopts 20 pin LGA package and its dimensions are 15 8 mm x 13 8 mm x 2 5 mm which can meet most customer requirements for space reduction It has the following hardware resources and features UAR...

Page 11: ...terface SIM UART SIM VBAT RF transceiver 1 3 Specifications Table 1 1 N11 Specifications Specifications Description Dimensions 15 8 0 1 mm x 13 8 0 1 mm x 2 5 0 2 mm H x W x D Weight 1 3 g Package 20...

Page 12: ...de Support SMS message receiving and sending and alert for new SMS messages Support SMS message management reading deleting storage list GPRS Features Support GPRS CLASS 12 Theoretical maximum uplink...

Page 13: ...e This chapter describes its pin definition and features 2 1 Pin Allocation Figure 2 1 Top view of N11 module GND GND GND VBAT VBAT ON OFF SIM_DATA SIM_CLK SIM_RESET VSIM UART_RXD UART_TXD DEBUG_RXD D...

Page 14: ...Power supply and Switch Interfaces 2 3 VBAT P Power supply input 3 4 V to 4 3 V 3 9 V is recommended 1 4 10 19 GND P Ground 5 ON OFF DI ON OFF input 0 VIL 0 6 2 1 VIH VBAT Low level pulse triggers ON...

Page 15: ...interface 50 impedance Reserved Pins 13 DEBUG_TXD DO Reserve a test point Do not connect these pins to power supply or ground 14 DEBUG_RXD DI Reserve a test point Do not connect these pins to power s...

Page 16: ...esign principles to obtain the optimal circuit performance Table 3 1 Power supply and switch interface Pin Signal I O Function Remarks 2 3 4 VBAT P Main power supply input 3 4 V to 4 3 V 3 9 V is reco...

Page 17: ...circuits Therefore the back end components and the module are protected A large bypass tantalum capacitor 220 F or 100 F or aluminum capacitor 470 F or 1000 F is expected at C1 to reduce voltage drop...

Page 18: ...5 times the voltage across the power supply Place low ESR bypass capacitors close to the module to filter out high frequency noise from the power supply The following design is recommended for 4 3 V...

Page 19: ...y circuit if automotive battery supplies power The maximum safe operating voltage of the component should be larger than 42 V Place TVS2 close to the input interface of the power supply to clamp the s...

Page 20: ...of power supply trace in design to avoid voltage drop Never use a diode to make the drop voltage between a higher input and module power Otherwise Neoway will not provide warranty for product issues c...

Page 21: ...edure of the module E g in the turn on procedure IO port of MCU has not completed the initialization and is in the output state UTXD signal of the port also the output pin forced to pull low or high t...

Page 22: ...omatically Power On Off Control Figure 3 7 shows a reference circuit for ON OFF control with inverted control logic Figure 3 7 Reference circuit for power on off control N11 module ON OFF TVS S 1 Figu...

Page 23: ...to rescue the module from abnormal condition is to apply a power OFF ON procedure rather than using the ON OFF control signal In fact ON OFF signal is software dependent 3 2 UART Table 3 2 UART Pin S...

Page 24: ...hows the reference design Figure 3 10 Level shifting circuit 1 VL IO_VL1 GND IO_VL2 VCC IO_VCC1 IO_VCC2 EN NLSX4373 VDD_2P8 UART_TXD UART_RXD VDD_1P8 VCC_IO MCU_RXD MCU_TXD 0 1 F 0 1 F NLSX4373 is a d...

Page 25: ...s R2 R4 2 k 10 k The greater the UART baud rate is the lower the R2 R4 value is R1 R3 4 7 k 10 k The greater the UART baud rate is the higher the R1 R3 value is Q1 Q2 MMBT3904 or MMBT2222 High speed t...

Page 26: ...220pF UART_RXD R1 10 k R2 10 k R3 4 7 k VDDIO_2P8 R4 4 7 k C2 220pF R5 47 k R6 4 7 k Q1 Q2 MCU_TXD Q1 Q2 MMBT3904 or MMBT2222 High speed transistor is better MCU_TXD and MCU_RXD are respectively the...

Page 27: ...ee Neoway_N11_AT_Command_Manual In sleep mode the module can respond to the incoming calls SMS and GPRS data Figure 3 13 shows the process of entering sleep mode Figure 3 13 Process of entering sleep...

Page 28: ...rom UART MCU pulls SLEEP pin to high End Enable UART and process services MCU pulls SLEEP pin to low Wait till services are processed Complete service procesing Y Y N N Sleep mode Initiate an outgoing...

Page 29: ...WRSAVE 0 End UART enabled Forbid sleep mode Exits from sleep mode 3 3 3 RING Signal Call Once a voice call is coming UART outputs RING character strings and meanwhile the RING pin outputs 30 ms negati...

Page 30: ...elf adaption to 1 8V 3 0V 7 SIM_CLK DO SIM card clock 8 SIM_RESET DO SIM card reset 9 VSIM P SIM card power supply output N11 provides one USIM card interface that is compatible with 1 8 V 3 0 V USIM...

Page 31: ...in series to enhance the ESD performance PCB Design Guidelines SIM signals are like to be jammed by RF radiation resulting in failure to detect the SIM card Place SIM far away from RF circuits Place...

Page 32: ...Neoway_N11_AT_Commands_Mannual 3 6 RF Interface 3 6 1 RF Design and PCB Layout ANT_MAIN of N11 requires a characteristic impedance of 50 and the impedance of the traces should be controlled between t...

Page 33: ...PCB Layout Guidelines Lay copper foil around RF connector Dig as many via holes as possible on the copper to ensure lowest grounding impedance The traces between N11 and the antenna connector should...

Page 34: ...input impedance is 50 Antenna should be well matched to achieve best performance in different application scenarios Antenna interfaces can be connected to rubber ducky antenna magnet antenna or embedd...

Page 35: ...RF wire can also be soldered to connect to the module Ensure sufficient soldering in case of line loss that lowers RF performance Figure 3 26 shows the two types of connections Figure 3 26 RF connect...

Page 36: ...DIO Vout 2 3 V 2 8 V 3 1 V Iout 4 mA Vin 0 3 V 0 V 0 6 V Iin 22 5 A If the voltage is too low the module might fail to start If the voltage is too high or there is a voltage burst during the startup t...

Page 37: ...Off leakage current Power on the module or use AT command to shut the module down 170 A Average network searching current Set the instrument Start the module Wait until the module registers the instru...

Page 38: ...4 4 ESD Protection Electronics need to pass severe ESD tests The following table shows the ESD capability of key pins of our module Add ESD protection to those pins in accordance to the application to...

Page 39: ...Hz 925 960 MHz DCS1800 1710 1785 MHz 1805 1880 MHz PCS1900 1850 1910 MHz 1930 1990 MHz 5 2 Transmitting Power and Receiving Sensitivity 5 2 1 Transmitting Power Table 5 2 Transmitting power GSM850 EGS...

Page 40: ...5 dBm Table 5 3 Transmitting power DCS1800 PCS1900 PCL Transmitting Power Threshold Range 0 30 dBm 2 dBm 1 28 dBm 3 dBm 2 26 dBm 3 dBm 3 24 dBm 3 dBm 4 22 dBm 3 dBm 5 20 dBm 3 dBm 6 18 dBm 3 dBm 7 16...

Page 41: ...Ltd 33 5 2 2 Receiving Sensitivity Band Typical GSM850 EGSM900 108 dBm DCS1800 PCS1900 108 dBm The data in the above tables is obtained by connecting the module to RF test instrument e g CMU200 CWM50...

Page 42: ...N11 Hardware User Guide Copyright Neoway Technology Co Ltd 34 6 Mechanical Features 6 1 Dimensions Figure 6 1 N11 dimensions Unit mm...

Page 43: ...mperature up to 260 C Figure 6 2 N11 label Figure 6 3 N11 V2 label The picture above is only for reference The silk screen printing must be clear No blur is allowed The material and surface finishing...

Page 44: ...N11 Hardware User Guide Copyright Neoway Technology Co Ltd 36 6 3 1 Tape Reel Packaging N11 in mass production are shipped in the following package Tape N11 module...

Page 45: ...d to air for more than 48 hours at conditions not worse than 30 C 60 RH bake it at a temperature higher than 90 degree for more than 12 hours before SMT Or if the indication card shows humidity greate...

Page 46: ...1 onto Application Board N11 is introduced in 20 pin LGA package This chapter describes N21 foot print recommended PCB design and SMT information to guide users how to mount the module onto applicatio...

Page 47: ...il The recommended stencil thickness is at least 0 12 mm to 0 15 mm 7 4 Solder Paste Do not use the kind of solder paste different from our module technique The melting temperature of solder paste wit...

Page 48: ...reflow soldering process to avoid poor solder joint caused by PCB bending Figure 7 3 SMT furnace temperature curve Technical parameters Ramp up rate 1 to 4 C sec Ramp down rate 3 to 1 C sec Soaking z...

Page 49: ...with great opening adjust the temperature to 245 degrees depending on the type of the solder paste and heat the module till the solder paste is melt Then remove the module using tweezers Do not shake...

Page 50: ...spital or airplane where it might interfere with other electronic equipment Please follow the requirements below in application design Do not disassemble the module without permission from Neoway Othe...

Page 51: ...Communication Equipment DSP Digital Signal Processor DTE Data Terminal Equipment DTMF Dual Tone Multi Frequency DTR Data Terminal Ready EFR Enhanced Full Rate EGSM Enhanced GSM EMC Electromagnetic Com...

Page 52: ...sonal Communication System RAM Random Access Memory RF Radio Frequency ROM Read only Memory RMS Root Mean Square RTC Real Time Clock SIM Subscriber Identification Module SMS Short Message Service SRAM...

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