Neoway N21 Series Hardware User's Manual
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Neoway N21 Series Hardware User's Manual

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N21
Hardware User Guide
Issue 1.2
Date 2018-12-24
Neoway Product Documentation

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Summary of Contents for Neoway N21 Series

  • Page 1 Hardware User Guide Issue 1.2 Date 2018-12-24 Neoway Product Documentation...
  • Page 2 Neoway provides customers complete technical support. If you have any question, please contact your account manager or email to the following email addresses: Sales@neoway.com...

  • Page 3: Table Of Contents

    4.3 Temperature Feature ........................26 4.4 ESD Protection ........................... 26 5 RF Features ..................... 27 5.1 Operating Bands ........................27 5.2 TX Power and RX Sensitivity ..................... 27 6 Mechanical Features ................28 Copyright © Neoway Technology Co., Ltd. All rights reserved.
  • Page 4 A.3 American Notice ......................... 35 A.3.1 Modify ..........................36 A.3.2 FCC Class A Digital Device Notice ................... 36 A.3.3 FCC Class B Digital Device Notice ................... 36 B Abbreviation .................... 37 Copyright © Neoway Technology Co., Ltd. All rights reserved.
  • Page 5 Figure 3-22 Reference design of WAKEUP ..................23 Figure 3-23 Driving LED directly ...................... 23 Figure 3-24 Driving LED with a triode ....................24 Figure 6-1 N21 dimensions (Unit: mm) .................... 28 Copyright © Neoway Technology Co., Ltd. All rights reserved.
  • Page 6 Hardware User Guide Figure 7-1 N21 bottom dimensions (Unit: mm) ................31 Figure 7-2 Recommended PCB foot print (Unit: mm) ..............32 Figure 7-3 SMT furnace temperature curve ..................33 Copyright © Neoway Technology Co., Ltd. All rights reserved.
  • Page 7 Table 4-4 N21 ESD protection ......................26 Table 5-1 Operating bands of N21 ....................27 Table 5-2 RF TX power of N21 ......................27 Table 5-3 RX sensitivity of N21 Cat NB1 ..................27 Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 8: About This Document

    It defines the features, indicators, reference designs, and test standards of the N21 module. Reference designs in this document are only for reference. Design applications based on the actual scenarios and conditions. Please contact Neoway technical support team for further technical support. Audience This document is intended for system engineers (SEs), development engineers, and test engineers.

  • Page 9: Symbols And Conventions

    Means reader be 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_N21_Datasheet Neoway_N21_Product_Specifications Neoway_N21_AT_Command_Mannual Neoway_N21_EVK_User_Guide Copyright © Neoway Technology Co., Ltd. All rights reserved. viii...

  • Page 10: About N21

    Hardware User Guide 1 About N21 1.1 Product Overview N21 is an compact industrial-grade NB-IoT module that supports Cat NB1. N21 series include multiple variants. Table 1-1 Lists the variants and bands supported. Table 1-1 Variants and bands Function Variant...

  • Page 11: Basic Features

    Temperature ranges Extended: -40° C to +85° C Storage: -45° C to +90° C Operating voltage VBAT: 3.1V to 4.3V, TYP: 3.6V MIPS processor Main frequency: 192 MHz, 16KB L2 cache Copyright © Neoway Technology Co., Ltd. All rights reserved.
  • Page 12 Neoway extended commands Protocol TCP, UDP, HTTP, HTTPS, FTP, LWM2M, MQTT, COAP Certificates CCC, SRRC, CTA, RoHS, CE*, GCF*, Vodafone*, FCC* China Mobile/China Unicom/China Telecom Approvals Ali cloud* * indicates in development Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 13: Module Pins

    Figure 2-1 shows the pad layout of N21. Figure 2-1 Pin definition of N21 VBAT VBAT STATUS NET_LIGHT WAKEUP PWRKEY_N Top View VDDIO_2P8 USIM_DATA DEBUG_UART_TXD USIM_CLK DEBUG_UART_RXD USIM_RESET UART_TXD USIM_VCC UART_RXD RESERVED RESET_N Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 14: Pin Description

    Used only for level shifting. =2.8V 2.8V power norm VDDIO_2P8 Leave this pin floating if it is output =50mA not used. 1, 4, 10, 21 Ensure that all GND pins are Copyright © Neoway Technology Co., Ltd. All rights reserved.
  • Page 15 USIM reset Antenna Interface AI/O Antenna 50 Ω impedance for traces Reserved Pins Leave these pins floating. Do not connect them to ground RESERVED or power supply through a pull-up resistor. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 16: Application Interfaces

    The power supply design consists of two parts: schematic design and PCB layout. Schematic Design N21 adopts a 3.3V-4.3V voltage input supplied by a battery and the typical voltage is 3.6V. Figure 3-1 Shows the schematic design of N21 power supply. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 17: Figure 3-1 Recommended Circuit Design 1

    Place a bypass capacitor of low-ESR close to the module to filter out high-frequency noise from  the power supply. A controllable power supply is preferable if the module is used in harsh conditions. Figure 3-2 shows the recommended schematic design. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 18: Figure 3-2 Recommended Schematic Design 2

    100 A. They have a short response time. Place the TVS as close to the interface as possible to ensure that the surge voltage can be clamped before the pulse is coupled to the neighbor traces. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 19: Vddio_2P8

    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 caused by this. In this situation, the diode will obviously decrease the module performances, or result in unexpected restarts, because the forward voltage of diode will vary greatly in different temperature and current.

  • Page 20: Figure 3-3 Reference Design Of Startup Controlled By Button

    Figure 3-3 Reference design of startup controlled by button Figure 3-4 Reference design of startup controlled by MCU PWRKEY_N USER_ON 4.7kΩ N21 module 47kΩ Figure 3-5 Reference design of automatic start once powered up PWRKEY_N kΩ N21 module Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 21: Figure 3-6 Startup Timing

    500 ms to PWRKEY_N can trigger the shutdown process of the module. The module is shut down after around 2 seconds, and then turns off the power supply. Figure 3-10 shows the hardware shutdown timing. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 22: Reset_N

    200 ms to RESET_N can trigger the reset process of the module. Figure 3-8 Reset controlled by button If 2.8V/3.0V/3.3V IO system is used then add a triode to separate it. Refer to the following designs. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 23: Peripheral Interfaces

    Q1. Figure 3-10 shows the reset timing of N21. Figure 3-10 Reset timing of N21 VBAT RESET_N 200ms Active Inactive UART 3.3 Peripheral Interfaces N21 provides various peripheral interfaces. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 24: Uart

    Note their application senarios. Level shift chip is recommended if the level of MCU is higher than 3.3V or the baudrate is higher than 1 MHz. Figure 3-12 shows the reference design. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 25: Figure 3-12 Recommended Level Shifting Circuit 1

    2. Figure 3-13 Recommended level shifting circuit 2 UART_TXD MCU_RXD 10 k Ω 4.7 k Ω VCC_IO VDDIO_2P8 MCU_TXD UART_RXD 4.7 k 10 k Ω Ω VCC_EX VDDIO_2P8 Copyright © Neoway Technology Co., Ltd. All rights reserved.
  • Page 26 ) is greater than 200mV and baudrate is lower than 1 MHz, adopt recommended level shifting circuit 3. Otherwise, low level at UART might be higher than required, resulting in failure to identify signals. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 27: Usim

    Function Remarks USIM_VCC USIM power Compatible with 1.8 V/3 V USIM card A 10 kΩ resistor is required between USIM_DATA DIO USIM card data IO USIM_VCC and USIM_DATA. USIM_CLK USIM clock Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 28: Figure 3-15 Reference Design Of Usim Card Interface

    Place USIM card closed to the module and USIM traces should be as short as possible.  Place ESD protection resistors and components close to USIM card.  Connect the ground of USIM to main ground to enhance jamming capability.  Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 29: Rf Interface

    RF performance. An impedance matching circuit, such as L network, T network, and pi network is mandatory in between. Pi network is recommended. Figure 3-16 L network module Figure 3-17 T network module Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 30: Figure 3-18 Pi Network

    RF solder pad. Figure 3-19 Recommended RF PCB design On the PCB, keep the RF signals and components far away from high-speed circuits, power  supplies, transformers, great inductors, the clock circuit, etc. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 31: Antenna Assembling

    RF wire can also be soldered to connect to the module. Ensure sufficient soldering in case of damage that lowers RF performance. Figure 3-21shows the two types of connections. Figure 3-21 RF connections Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 32: Other Interfaces

    NET_LIGHT outputs a high level of 2.8V and a maximum driving current of 4 mA. High level is allowed to drive a common LED indicator directly. See Figure 3-23. Figure 3-23 Driving LED directly NET_LIGHT Module 1kΩ Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 33: Status

    STATUS is used to indicate that N21 is started up successfully. It can drive an LED indicator directly or through an triode. Its schematic design is simillar to that of NET_LIGHT. See Figure 3-23 and Figure 3-24. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 34: Electric Feature And Reliability

    4.2 Current Features Table 4-2 Current consumption of N21 (Typical) Idle Active (mA) Status (DRX/eDRX) Power (dBm) Band (μA) (mA) <4.5 1.7/1 Cat NB1: B3, B5, <4.5 1.7/1 B8, B20, B28 <4.5 1.7/1 Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 35: Temperature Feature

    Table 4-4 N21 ESD protection Testing Point Contact Discharge Air Discharge VBAT ± 8KV ± 15KV ± 8KV ± 15KV ± 8KV ± 15KV Cover ± 8KV ± 15KV Others ± 2KV ± 4KV Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 36: Rf Features

    HD-FDD LTE B20 23dBm+2/-2dBm <-40 dBm HD-FDD LTE B28 23dBm+2/-2dBm <-40 dBm Table 5-3 RX sensitivity of N21 Cat NB1 Band Sensitivity Duplex Mode LTE B3, B5, B8, B20, B28 ≤-113 dBm HD-FDD Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 37: Mechanical Features

    6 Mechanical Features 6.1 Dimensions Figure 6-1 N21 dimensions (Unit: mm) 6.2 Label label made materials that deformation-resistant, fade-resistant, high-temperature-resistant and it can endure high temperature up to 260 ° C. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 38: Package

    N21 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 reasons. N21 is a level 3 moisture-sensitive electronic elements, in compliance with IPC/JEDEC J-STD-020 standard. Copyright © Neoway Technology Co., Ltd. All rights reserved.
  • Page 39 90 degree for more than 12 hours before SMT.Or, if the indication card shows humidity greater than 20%, the baking procedure is also required.Do not bake modules with the package tray directly. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 40: Mounting N21 Onto Application Board

    N21 is introduced in 22-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 N21 bottom dimensions (Unit: mm) Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 41: Application Foot Print

    When using only solder pastes with lead, please ensure that the reflow temperature is kept at  220 ° C for more than 45 seconds and the peak temperature reaches 240 ° C. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 42: Smt Profile

    Neoway will not provide warranty for heat-responsive element abnormalities caused by improper temperature control. For information about cautions in N21 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 250 degrees (depending on the type of the solder paste), and heat the module till the solder paste is melt.

  • Page 43: Safety Recommendations

     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 44: A Conformity And Compliance

    This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Copyright © Neoway Technology Co., Ltd. All rights reserved.

  • Page 45: Modify

     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 46: B Abbreviation

    Frequency Division Multiple Access Integrated Circuit IMEI International Mobile Equipment Identity Liquid Crystal Display Light Emitting Diode Mobile Station Printed Circuit Board Random Access Memory Radio Frequency Read-only Memory Transient Voltage Suppressor Copyright © Neoway Technology Co., Ltd. All rights reserved.
  • Page 47 Hardware User Guide Real Time Clock USIM Subscriber Identification Module SRAM Static Random Access Memory TDMA Time Division Multiple Access UART Universal asynchronous receiver-transmitter VSWR Voltage Standing Wave Ratio Copyright © Neoway Technology Co., Ltd. All rights reserved.

This manual is also suitable for:

N21-eu-011as1N21-cn-011as1

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