Neoway N27 Hardware User's Manual
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Neoway N27 Hardware User's Manual

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Hardware User Guide
Issue 1.0 Date 2020-04-13

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Summary of Contents for Neoway N27

  • Page 1 Hardware User Guide Issue 1.0 Date 2020-04-13...
  • Page 2 THIS GUIDE PROVIDES INSTRUCTIONS 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 LOSS CAUSED BY IMPROPER OPERATIONS. THE INFORMATION IN THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE DUE TO PRODUCT VERSION UPDATE OR OTHER REASONS.

  • Page 3: Table Of Contents

    N27 Hardware User Guide Contents Contents 1 About N27 ....................9 1.1 Product Overview ......................... 9 1.2 Block Diagram ..........................9 1.3 Basic Features ........................... 10 2 Module Pins ..................... 12 2.1 Pad Layout ..........................12 2.2 Pin Description ........................... 13 3 Application Interfaces ................
  • Page 4 6.2 Label ............................46 6.3 Packing ............................46 6.3.1 Packaging .......................... 46 6.3.2 Moisture ..........................46 7 Mounting N27 onto Application PCB ............47 7.1 Bottom Dimensions ........................47 7.2 Application Foot Print ......................... 48 7.3 Stencil ............................48 7.4 Solder Paste ..........................48 7.5 SMT Furnace Temperature Curve ....................
  • Page 5 Table of Figures Table of Figures Figure 1-1 Block Diagram ........................ 10 Figure 2-1 N27 Pin definition ......................12 Figure 3-1 Recommended power design ..................18 Figure 3-2 Reference design of startup controlled by button ............20 Figure 3-3 Reference design of startup controlled by MCU ............. 20 Figure 3-4 Startup timing ........................
  • Page 6 Figure 6-1 N27 dimensions (Unit: mm) .................... 45 Figure 7-1 Bottom dimensions of N27 (Unit: mm) ................47 Figure 7-2 Recommended footprint of N27 application PCB (Unit: mm) ......... 48 Figure 7-3 SMT furnace temperature curve ..................49 Copyright © Neoway Technology Co., Ltd...
  • Page 7 Table 5-3 RX sensitivity of N27 GSM ....................42 Table 5-4 RX sensitivity of N27 Cat M1 ................... 42 Table 5-5 RX sensitivity of N27 Cat NB1 (without retransmission) ..........42 Table 5-6 RX sensitivity of N27 Cat NB1 (with retransmission) ............43...
  • Page 8 About This Document Scope This document is applicable to N27 series. It defines the features, indicators, and test standards of the N27 module and provides reference for the hardware design of each interface. Audience This document is intended for system engineers (SEs), development engineers, and test engineers.
  • Page 9 N27 Hardware User Guide About This Document Related Documents Neoway_N27_Datasheet Neoway_N27_Product_Specifications Neoway_N27_AT_Command_Mannual Neoway_N27_EVK_User_Guide Copyright © Neoway Technology Co., Ltd viii...

  • Page 10: About N27

    B20, B25, B26, B28, B66, B71, B85 GPRS: 850/900/1800/1900 MHz N27 adopts a 76-pin package with a square GND pad at each corner. Its dimensions are only 18 mm x24 mm. With industrial-grade performance, it is well applicable to electrical terminals, tracker, POS, and other IoT terminals.

  • Page 11: Basic Features

    * indicates the function is in the development phase. 1.3 Basic Features Parameter Description Dimensions: (24.0± 0.15) mm × (18.0± 0.15) mm × (2.3± 0.2) mm ⚫ Physical features Package: LGA ⚫ Weight: TBD ⚫ Copyright © Neoway Technology Co., Ltd...
  • Page 12 Neoway extended commands PDU, TXT Protocol TCP, UDP, HTTP, FTP, MQTT, LWM2M, COAP Certification approval CCC, FCC, RoSH Some RF indicators might not meet 3GPP/3GPP2 standards in extended temperature but it does not affect functioning. Copyright © Neoway Technology Co., Ltd...

  • Page 13: Module Pins

    N27 Hardware User Guide Chapter 2 Module Pins 2 Module Pins There are 76 pins on N27 and their pads are introduced in the LGA package. 2.1 Pad Layout Figure 2-1 shows the pad layout of the N27. Figure 2-1 N27 Pin definition...

  • Page 14: Pin Description

    1, 4, 10, 22, 32, 46, 58, 60, 67, 70, 72, 73, 74, Ensure that all GND pins are 75, 76 connected to the ground plane Control Interfaces Connected to 1.8V through an PWRKEY_N ON/OFF button internal pull-up resistor Used to control the module Copyright © Neoway Technology Co., Ltd...
  • Page 15 SIM Interface SIM card power Support 1.8V only, Omax USIM_VCC supply output =30mA Connect USIM_VCC SIM card data through kΩ pull-up USIM_DATA resistor. USIM_CLK SIM card clock USIM_RESET SIM card reset Copyright © Neoway Technology Co., Ltd...
  • Page 16 PCM data RX Multiplexed as I2S_RX PCM_DOUT PCM data TX Multiplexed as I2S_TX clock PCM_CLK Multiplexed as I2S_SCLK signal I2S_MCLK I2S main clock SPI interface SPI_CLK Clock signal Leave this pin floating if it is not Copyright © Neoway Technology Co., Ltd...
  • Page 17 WAKEUP_IN* Reserved pin development phase. Do NOT pull up these pins to high level or ground them before the module is started completely. otherwise, the module cannot start up successfully. Copyright © Neoway Technology Co., Ltd...
  • Page 18 Chapter 2 Module Pins Connect USB_BOOT Forcible VDDIO_1P8 through a pull-up USB_BOOT download resistor before the module is control started, and the module will enter forcible download mode. RESERVED Reserved pin Leave it floating. Copyright © Neoway Technology Co., Ltd...

  • Page 19: Application Interfaces

    N27 Hardware User Guide Chapter 3 Application Interfaces 3 Application Interfaces N27 provides power supply, control, communications, RF, and other interfaces to meet customers' requirements in different application scenarios. This chapter describes how to design each interface and provides reference designs and guidelines.
  • Page 20 3A. Ensure low resistance 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 a warranty for product issues caused by this. In this situation, the diode will obviously decrease the module performances, or result in unexpected restarts, due to the forward voltage of the diode will vary greatly in different temperature and current.

  • Page 21: Vddio_1P8

    Chapter 3 Application Interfaces 3.1.2 VDDIO_1P8 N27 provides one VDDIO_1P8 pin that outputs 1.8V@50mA. VDDIO_1P8 is enabled automatically when the module is awake or in a running state. It is recommended that VDDIO_1P8 is used for level shift only and a TVS diode should be added.

  • Page 22: Figure 3-4 Startup Timing

    UART Shutdown Process The N27 module allows users to shut it down through hardware or software. PWRKEY_N is used to power the module off. When the module is working, inputting negative pulse for longer than 2 seconds to PWRKEY_N can trigger the shutdown process of the module.

  • Page 23: Peripheral Interfaces

    USB2.0 used to download the module firmware USB_DP AIO USB data positive signal The N27 module can be used as a USB device. It is an option for customers. Figure 3-10 shows the recommended USB connection. Figure 3-6 USB connection USB Connector...

  • Page 24: Uart

    UART2_TXD Data TX N27 provides pins to configure three UART interfaces, two of which support hardware flow control. The UART interfaces support 4 Mbps at most. The level at the interfaces is 1.8V. Figure 3-7 shows the reference design of the UART interface.

  • Page 25: Figure 3-7 Uart Connection

    Note the match of signals. ⚫ The UART of N27 operates in a power domain of 1.8V. If your host MCU is not in this power domain, add a level shifting circuit between the module and the host. The following figure shows the recommended level shifting circuit.

  • Page 26: Sim

    USIM reset USIM_PRESENT USIM detection A pull-up resistor is recommended N27 provides one SIM interface, which supports 1.8V only. Figure 3-9 shows the reference design of the SIM card interface. Figure 3-9 Reference design of the SIM card interface 20Ω...

  • Page 27: Pcm

    Connect a 20 Ω resistor respectively to USIM_DATA, USIM_RESET, USIM_CLK, and ⚫ USIM_PRESENT in series to enhance the ESD performance. N27 supports SIM card detect, but this function is determined by the structure of the SIM card ⚫ connector. The module determines the SIM card status based on the level of the USIM_PRESENT pin.

  • Page 28: Figure 3-11 Pcm Sync Signal Timing

    Timing Parameter Unit Value Value Value μs t(sync) PCM_SYNC cycle t(synca) PCM_SYNC valid time μs t(syncd) PCM_SYNC invalid time 124.5 t(clk) PCM_CLK cycle t(clkh) PCM_CLK high time t(clkl) PCM_CLK low time Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 29: Figure 3-14 I2Sconnection

    Delay time from PCM_CLK high to t(pdout) PCM_DOUT low Delay time from PCM_CLK low to t(zdout) PCM_DOUT high impedance N27 provides one I2S interface, which is multiplexed from PCM. It operates at 1.8 V and can be used for digital audio. Signal Function Remarks I2S_MCLK I2S main clock Max.

  • Page 30: Spi

    Delay time from data send to WS output 65.100 t(htr) Hold time from data send to WS output 3.3.5 SPI Signal Function Remarks SPI_CLK Clock signal Max. 50MHz SPI_MISO Master input SPI_MOSI Master output SPI_CS_N Chip select Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 31: I2C

    Input set-up time t(mih) Input hold time 3.3.6 I2C Signal Function Remarks Add a 2.2 kΩ pull-up resistor. I2C_SCL I2C clock Add a 2.2 kΩ pull-up resistor. I2C_SDA I2C data Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 32: Rf Interface

    GNSS antenna 3.4.1 ANT Interface ANT of N27 requires a characteristic impedance of 50 Ω. You should control the impedance of the traces between the pins and antenna to ensure the RF performance. An impedance matching circuit, such as the L network, split capacitor network, and pi network is mandatory in between. Pi network is...

  • Page 33: Figure 3-18 Pi Network

    Lay copper foil around the RF connector. Dig as many ground holes as possible on the copper to ⚫ ensure the lowest grounding impedance. Keep the trace between N27 and the antenna connector as short as possible. Control the trace ⚫ impedance to 50Ω.

  • Page 34: Ant_Gnss Interface

    3.4.2 ANT_GNSS Interface GPS Impedance Control ANT_GNSS (71st pin) is the GNSS RF interface of N27, which requires a characteristic impedance of 50Ω. Figure 3-20 shows the GNSS structure inside the module. Figure 3-20 GNSS RF structure...

  • Page 35: Antenna Assembling

    PCB Printing or SMT ⚫ The PCB antenna is embedded into the PCB board during manufacturing and the ceramic chip antenna is mounted to the PCB after the design phase is completed. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 36: Figure 3-23 Antenna Layout

    5 Space between the antenna and ground area. Figure 3-23 shows the layout of this area. Figure 3-24 Layout around the antenna For more details, refer to the antenna manuals and other documents. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 37: Lcd* Interfaces

    The module provides two ADC channels, and the input voltage ranges from 0.1 V to 1.7 V. The ADC pins support a resolution of 15 bit and it can be used for temperature detection and other checks. For details about ADC commands, see Neoway_N27_AT_Command_Manual. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 38: Usb_Boot

    This pin outputs 1.8V high level to control the startup indicator after the module is started successfully. 3.6.4 NET_LIGHT NET_LIGHT outputs a continuous pulse signal after the module registers with the network. For details about the light modes, see Neoway_N27_AT_Command_Manual. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 39: Electric Features And Reliability

    N27 Hardware User Guide Chapter 4 Electric Features and Reliability 4 Electric Features and Reliability This chapter describes the electric feature and reliability of the N27 module. 4.1 Electric Features Table 4-1 Operating conditions of N27 Parameter Minimum Value Typical Value Maximum Value 3.1V...

  • Page 40: Temperature Features

    When the module works at a temperature within the range, its performance can meet the 3GPP standards. Some RF indicators might not meet 3GPP/3GPP2 standards in extended temperature but it does not affect functioning. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 41: Rf Features

    832~862MHz 791~821MHz FDD-LTE B25 1850~1915MHz 1930~1995MHz FDD-LTE B26 814~849MHz 859~894MHz FDD-LTE B27(CATM-only) 807~824MHz 852~869MHz FDD-LTE B28 703~748MHz 758~803MHz FDD-LTE B31 452.5~457.5MHz 462.5~467.5MHz FDD-LTE B66 1710~1780MHz 2110~2180MHz FDD-LTE B71*(no supported) 617~652MHz 663~698MHz Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 42: Tx Power And Rx Sensitivity

    HD-FDD LTE B28 <-40 dBm 23dBm+2/-2dB(CATNB) HD-FDD LTE B31 23dBm+2/-2dB <-40 dBm HD-FDD LTE B66 23dBm+2/-2dB <-40 dBm HD-FDD LTE B71(CATNB only) 20dBm+2/-2dB <-40 dBm HD-FDD LTE B85 23dBm+2/-2dB <-40 dBm Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 43: Table 5-3 Rx Sensitivity Of N27 Gsm

    ≤-107 LTE B85 HD-FDD All values above were obtained in the lab. In actual applications, there might be a difference because of network environments. Table 5-5 RX sensitivity of N27 Cat NB1 (without retransmission) Band Sensitivity(dBm/180KHz) Duplex Mode ≤-114 LTE B1 HD-FDD Copyright ©...

  • Page 44: Gnss Feature

    ≤-114 LTE B71* HD-FDD ≤-114 LTE B85 HD-FDD Table 5-6 RX sensitivity of N27 Cat NB1 (with retransmission) Band Sensitivity LTE B1, B2, B3, B4, B5, B8, B12, B13, B18, ≤TBD B19, B20, B25, B26, B28, B66, B71, B85 ≤TBD LTE B31 The LTE_NB1/LTE_NB2 might be supported by future variants.
  • Page 45 TBD (CEP50) Hot start (in air) Cold start (in air) Update frequency 1Hz by default CNRin/CNRout Max. positioning altitude Max. positioning speed Max. positioning acceleration GNSS data type GNSS antenna type Passive Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 46: Mechanical Features

    N27 Hardware User Guide Chapter 6 Mechanical Features 6 Mechanical Features This chapter describes the mechanical features of N27. 6.1 Dimensions dimensions (Unit: mm) Figure 6-1 Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 47: Label

    The material and surface finishing must comply with RoHS directives. ⚫ 6.3 Packing N27 modules are packed in sealed bags on delivery to guarantee a long shelf life. Follow the same package of the modules again in case of opened for any reason. 6.3.1 Packaging 6.3.2 Moisture...

  • Page 48: Mounting N27 Onto Application Pcb

    Chapter 7 Mounting N27 onto Application PCB 7 Mounting N27 onto Application PCB N27 is introduced in a 76-pin LGA package. This chapter describes the N27 footprint, recommended PCB design and SMT information to guide users on how to mount the module onto the application PCB board.

  • Page 49: Application Foot Print

    N27 Hardware User Guide Chapter 7 Mounting N27 onto Application PCB 7.2 Application Foot Print Figure 7-2 Recommended footprint of N27 application PCB (Unit: mm) 7.3 Stencil 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.

  • Page 50: Smt Furnace Temperature Curve

    Neoway will not provide a warranty for heat-responsive element abnormalities caused by improper temperature control. For information about cautions in N27 storage and mounting, refer to Neoway Module Reflow Manufacturing Recommendations. When manually desoldering the module, use heat guns 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.

  • Page 51: Safety Recommendations

    ⚫ with other electronic equipment. Please follow the requirements below in application design: Do not disassemble the module without permission from Neoway. Otherwise, we are entitled to ⚫ refuse to provide further warranty. Please design your application correctly by referring to the HW design guide document and our ⚫...

  • Page 52: Conformity And Compliance

    15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 53: Fcc Class B Digital Device Notice

    ⚫ Connect the equipment into an outlet on a circuit different from that to which the receiver is ⚫ connected. Consult the dealer or an experienced radio/TV technician for help. ⚫ Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 54: Abbreviation

    Frequency Division Multiple Access Full Rate GPRS General Packet Radio Service Global Standard for Mobile Communications Half Rate Integrated Circuit IMEI International Mobile Equipment Identity Liquid Crystal Display Light Emitting Diode Copyright © Neoway Technology Co., Ltd. All rights reserved.
  • Page 55 Subscriber Identification Module Short Message Service SRAM Static Random Access Memory Terminal adapter TDMA Time Division Multiple Access UART Universal asynchronous receiver-transmitter USSD Unstructured Supplementary Service Data VSWR Voltage Standing Wave Ratio Copyright © Neoway Technology Co., Ltd. All rights reserved.

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