Neoway N20 Hardware User's Manual
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Neoway N20 Hardware User's Manual

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N720 (Cat1) Hardware User Guide ()
N20 Hardware User Guide
Version 1.0

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Summary of Contents for Neoway N20

  • Page 1 N720 (Cat1) Hardware User Guide () N20 Hardware User Guide Version 1.0...
  • 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 N20 Hardware User Guide Revision Record Issue Changes Revised By Date V1.0 Initial draft He Zhizhong 2017-10 Copyright © Neoway Technology Co., Ltd...

  • Page 4: Table Of Contents

    N20 Hardware User Guide Contents 1 Introduction to N20 ......................1 1.1 Overview ............................1 1.2 Block Diagram ........................... 1 1.3 Features .............................. 2 2 Application Interfaces ...................... 4 2.1 Specifications and Pin Definition ....................... 4 2.2 Pin Description ........................... 5 2.3 Power and Control Interfaces ......................
  • Page 5 6.3 Recommended PCB Foot Print......................42 7 Mounting and Packaging ....................43 7.1 Mounting the Module onto the Application Board ................43 7.2 Packaging ............................43 8 SMT Temperature Curve ....................44 9 Abbreviations ........................45 Copyright © Neoway Technology Co., Ltd...
  • Page 6 N20 Hardware User Guide Table of Figures Figure 1-1 N20 block diagram ........................ 2 Figure 2-1 N20 module pin definition (Top View) .................. 4 Figure 2-2 Current peaks and voltage drops ..................10 Figure 2-3 Capacitors used for the power supply ...................11 Figure 2-4 Reference design of power supply control ................11...
  • Page 7 Figure 3-6 Power supply reference for active antenna ................34 Figure 6-1 Dimensions of N20 (unit: mm) .................... 40 Figure 6-2 N20 PCB foot print (Top View) (unit: mm) ................ 41 Figure 6-3 Recommended N20 PCB foot print (unit: mm) ..............42 Figure 8-1 Temperature curve .......................
  • Page 8 Table 5-2 N20 RF TX power ........................ 37 Table 5-3 N20 GSM RX sensitivity ...................... 38 Table 5-4 N20 Cat M1 QPSK RX sensitivity ..................38 Table 5-5 N20 Cat NB1 RX sensitivity ....................39 Copyright © Neoway Technology Co., Ltd...

  • Page 9: Introduction To N20

    1 Introduction to N20 1.1 Overview N20 is an industrial-grade module developed on Qualcomm platform. Its dimensions are 23.8 mm x 25.8 mm x 2.8 mm. This module has an ultra-wide operating temperature range of -40 ° C to +85 ° C and electrostatic capacity of 8kV.

  • Page 10: Features

    Power Manager VBAT Baseband Interface SDIO GPIO UART 1.3 Features Table 1-1 N20 baseband and wireless features Specifications Description Power supply VBAT: 3.3V to 4.3 V; Typical value: 3.8 V Current in sleep mode Current in PSM mode Operating temperature -40 °...
  • Page 11 1 SPI interface, supporting only host mode At most 50 Mbps 1 I2C interface, used to control external sensor 1 PCM interface, used to transmit digital audio SDIO 1 SDIO interface, used to control 4-bit WLAN interface GPIO 4 GPIOs Copyright © Neoway Technology Co., Ltd...

  • Page 12: Application Interfaces

    Table 2-1 N20 dimensions Specifications Dimensions 23.8± 0.15 mm x 25.8± 0.15 mm x 2.8± 0.15 mm (H x W x D) Weight Package 68-pin LCC Figure 2-1 N20 module pin definition (Top View) Copyright © Neoway Technology Co., Ltd...

  • Page 13: Pin Description

    Dual-voltage, 1.8V or 2.85V =1.26V~2.1V, =-0.3V~0.36V =2V~3.15V, =-0.3V~0.57V =1.44V~1.8V, =0V~0.4V =2.28V~2.85V, V =0V~0.4V min=1.2V, V max= 0.3V 1.8V digital IO voltage min=1.35V, V max=0.45V Level for USB2.0 data interface Vmin=2.97V, V max=3.5V, V typ=3.08V Copyright © Neoway Technology Co., Ltd...

  • Page 14: Table 2-3 N20 Pin Description

    N20 Hardware User Guide Table 2-3 N20 pin description Power Name Function Level Feature (V) Remarks Domain Power Supply VBAT 20, 21, 22 Main power supply Vmax=4.3 V Supply a maximum current of 2 A. Used for level shifting and to supply power Vnorm=1.8 V;...
  • Page 15 Master and slave device USB _ID 1.8 V Leave this pin unconnected if it is not used. detect Vmax=1.7 V; Analog-to-digital signal 16-bit, detectable voltage range: 0.1 V to ADC1 1.8 V conversion 1.7 V Vmin=0.1 V Copyright © Neoway Technology Co., Ltd...
  • Page 16 Leave this pin unconnected if it is not used. SPI_CLK Clock signal 1.8V Leave this pin unconnected if it is not used. SPI_MISO Master input, slave output 1.8V Leave this pin unconnected if it is not used. Copyright © Neoway Technology Co., Ltd...
  • Page 17 Leave this pin unconnected if it is not used. Connect a 10 kΩ pull-up resistor to 1.8V, and the module enters USB download FORCE_USB_B Forcible upgrade control 1.8 V mode Leave this pin unconnected if it is not used. Copyright © Neoway Technology Co., Ltd...

  • Page 18: Power And Control Interfaces

    3.3 V. Figure 2-2 Current peaks and voltage drops Input current 3.8 V Voltage 3.3 V Keep the voltage above 3.3 V 3.7 ms 7.4 ms 10.7 ms 0 ms Copyright © Neoway Technology Co., Ltd...

  • Page 19: Figure 2-3 Capacitors Used For The Power Supply

    MIC29302WU in Figure 2-4 is an LDO and outputs a maximum current of 3 A to ensure the performance of the module. Figure 2-4 Reference design of power supply control PWR_EN VBAT VOUT 100K MIC29302WU VDC_5V 470uF 0.1 uF 100pF 33pF 10 uF 47.5K 100 uF 0.1 uF Copyright © Neoway Technology Co., Ltd...

  • Page 20: Figure 2-5 Reference Design Of Power Supply Controlled By P-Mosfet

    The inductor used in Reference Design (b), should be a power inductor and have very low resistance. The value of 10 μH, with average current ability greater than 2 A and low DC resistance, is recommended. Copyright © Neoway Technology Co., Ltd...

  • Page 21: Vddio_1P8

    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, due to the forward voltage of diode will vary greatly in different temperature and current.

  • Page 22: Figure 2-7 Push Switch Control

    Perform other operations on the module only after it is initialized completely. If the module is powered on but the power-on sequence has not been completed, the states of each pin are uncertain. The power-on timing of the module is shown in Figure 2-10. Copyright © Neoway Technology Co., Ltd...

  • Page 23: Figure 2-10 N20 Power-On Timing

    N20 Hardware User Guide Figure 2-10 N20 power-on timing VBAT t >200ms t >2s PWRKEY <0.6V RESET_N Active Inactive Inactive Active Inactive All Interface Inactive Power-off The module can be powered off in two ways: hardware power off and software power off.

  • Page 24: Reset_N

    NPN transistor is VDD_1P8. If a voltage higher than 1.8 V is supplied, the voltage across RESET_N might be higher than the threshold 2.1 V once inputting high level. Figure 2-14 shows the reset sequence. Copyright © Neoway Technology Co., Ltd...

  • Page 25: Dtr

    N20 Hardware User Guide Figure 2-14 N20 reset sequence VBAT RESET_N Active Inactive All Interface 2.3.5 DTR Generally, the DTR pin is used to control sleep mode together with AT commands. Enable the sleep mode function by AT command. Then pulling DTR low will bring the module into sleep mode if the module is idle.

  • Page 26: Netlight

    Figure 2-15 LED indicator driven by transistor When the module is running, the LED indicator is driven by the NET_LIGHT pin to indicate different module status with its various blink behaviors. N20 supports multiple blink style and users can configure it using AT commands.

  • Page 27: Usb Interface

    USB ID Used for OTG function USB can be used to download firmware for N20 and establish data communication for commissioning. If the module is used only as USB Connect a 1 μF and a 22 pF filter capacitors in parallel to the VBUS pin and place them as close to the pin as possible.

  • Page 28: Figure 2-18 Usb Connection

    N20 Hardware User Guide Figure 2-18 USB connection USB_VBUS USB_VBUS USB_DM USB_HS_DM USB_HS_DP USB_DP USB_ID USB_ID Figure 2-19 USB connection for OTG VCC(3.3V-5.2V) D1 C1 USB_VBUS USB_DM USB_HS_DM USB_HS_DP USB_DP USB_ID USB_ID Copyright © Neoway Technology Co., Ltd...

  • Page 29: Uim Card Interface

    A pull-up resistor is recommended N20 supports 1.8 V/2.85 VUIM cards. VUIM is the power supply pin of the UIM card and its maximum load is 30 mA. The UIM_DATA pin is not pulled up internally, so reserve a pull-up resistor externally in design.

  • Page 30: Sdio Interface

    DS, HS, SDR12, SDR25, SDR50, and SDR104. The following figures and table shows the sequences and parameters of SDR and DDR modes respectively. Figure 2-21 SDIO SDR timing SDC_CLK t(csurd) t(chrd) t(dsurd) t(dhrd) Read t(pddwr) t(cdvrd) t(pdcwr) t(dvrd) Write Copyright © Neoway Technology Co., Ltd...

  • Page 31: Pcm Interface

    Delay time from data write to transmit 6.15 t(pdcwr) Delay time from command write to transmit -7.85 2.65 2.7 PCM Interface Name Function Remarks PCM_SYNC PCM sync signal PCM_CLK PCM clock signal PCM_DIN PCM data input Copyright © Neoway Technology Co., Ltd...

  • Page 32: Figure 2-23 Pcm Connection

    N20 Hardware User Guide PCM_DOUT PCM data output I2S_MCLK I2S main clock Default frequency: 12.288MHz N20 provides one I2S/PCM MUX interface that supports 1.8 V. Figure 2-23 shows the connection of PCM. Figure 2-23 PCM connection Figure 2-24 I2S connection I2S_MCLK I2S_MCLK...

  • Page 33: Figure 2-26 Pcm Data Input Timing

    Set-up time from PCM_DIN high t(sudin) to PCM_CLK low Hold time from PCM_CLK low to t(hdin) PCM_DIN high Delay time from PCM_CLK high t(pdout) to PCM_DOUT low Delay time from PCM_CLK low to t(zdout) PCM_DOUT high impedance Copyright © Neoway Technology Co., Ltd...

  • Page 34: I2C Interface

    Typical Max. Unit Clock cycle (max. 50 MHz) 20.0 t(ch) Hold time for clock high t(cl) Hold time for clock low t(mov) Output valid time -5.0 t(mis) Input set-up time t(mih) Input hold time Copyright © Neoway Technology Co., Ltd...

  • Page 35: Uart Interfaces

    UART1_TX UART data transmit N20 provides 2 UART interfaces, one of which support hardware flow control. The UART interfaces support 4 Mbps at most. The level at the interfaces is 1.8V. Figure 2-29 shows the reference design of the UART interface.

  • Page 36: Figure 2-30 Recommended Level Shifting Circuit 1

    TX and RX ports of the module. Voltage at VCC_IO is the voltage at the UART of the MCU while voltage at VDD_1V8 is the voltage at the UART of the module. Figure 2-31 shows another recommended level shifting circuit. Copyright © Neoway Technology Co., Ltd...

  • Page 37: Adc Interfaces

    UART of the module. 2.11 ADC Interfaces N20 provides two ADC channels, and the input voltage ranges from 0.1 V to 1.7 V. ADC pin supports highest precision of 16 bit and it can be used for temperature and other check.

  • Page 38: Gpio Interfaces

    2.12 GPIO Interfaces N20 provides 4 GPIO pins, three among which support interrupt. Do not connect GPIO4 to the power supply through a pull-up resistor before the module is started. If high level is detected at this pin or any current is input at this pin during the startup of the module, the module will be forced to enter the download mode.

  • Page 39: Rf Interface

    3.1 2G/4G RF Design and PCB Layout RF_ANT_MAIN is the antenna pins of N20. A 50 Ω antenna is required. VSWR ranges from 1.1 to 1.5. The antenna should be well matched to achieve best performance. It should be installed far away from high-speed logic circuits, DC/DC power or any other strong disturbing sources.

  • Page 40: Figure 3-2 Recommended Rf Pcb Design

    RF antenna can also be connected to the module by soldering. In this manner, ensure proper soldering in case of damage that lowers RF performance. Figure 3-4 shows the pictures of these two connections. Figure 3-4 RF connections Copyright © Neoway Technology Co., Ltd...

  • Page 41: Gps Rf Design And Pcb Layout

    PCB traces and the traces should be as short as possible. The power supply of the active antenna is fed by the 100 nH inductance through the signal traces. Copyright © Neoway Technology Co., Ltd...

  • Page 42: Figure 3-6 Power Supply Reference For Active Antenna

    On the PCB, ke ep the RF signals and RF componen5s away from high - s peed circuits, power supplies, transformers, grea5 indu15ors, the clock circuit of single - c hip host, e5c. Copyright © Neoway Technology Co., Ltd 34...

  • Page 43: Electrical Features And Reliability

    N20 Hardware User Guide 4 Electrical Features and Reliability 4.1 Electrical Features Table 4-1 N20 electric features Module Status Minimum Value Typical Value Maximum Value 3.3 V 3.8 V 4.3 V VBAT 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, the module might be damaged permanently.

  • Page 44: Table 4-3 N20 Esd Features

    N20 Hardware User Guide Table 4-3 N20 ESD features Testing Point Contact Discharge Air Discharge VBAT ± 8 kV ± 15 kV ± 8 kV ± 15 kV ± 8 kV ± 15 kV Cover ± 8 kV ± 15 kV Others ±...

  • Page 45: Rf Features

    FDD-LTE B26 814~849 MHz 859~894 MHz FDD-LTE B28 703~748 MHz 758~803 MHz TDD-LTE B39 1880~1920 MHz 1880~1920 MHz 5.2 TX Power and RX Sensitivity Table 5-2 N20 RF TX power Band Max Power Min. Power EGSM900 33dBm+2/-2dB 5dBm+2/-2dB DCS1800 30dBm+2/-2dB 0dBm+2/-2dB...

  • Page 46: Table 5-3 N20 Gsm Rx Sensitivity

    <-40dBm TDD-LTE B39 23dBm+2/-2dB <-40dBm Table 5-3 N20 GSM RX sensitivity Band REFSENS EGSM900 <=-108dBm DCS1800 <=-108dBm Table 5-4 N20 Cat M1 QPSK RX sensitivity Band REFSENS Duplex Mode LTE B1 <=-103dBm HD-FDD LTE B2 <=-101dBm HD-FDD LTE B3 <=-100dBm...

  • Page 47: Table 5-5 N20 Cat Nb1 Rx Sensitivity

    N20 Hardware User Guide All the values above are obtained in the lab environment. In actual applications, there might be a difference because of the network environment. Table 5-5 N20 Cat NB1 RX sensitivity Band REFSENS Duplex Mode LTE B1,B2,B3,B5,B8,B18,B19,B20,B26,B28 <=-107.5dBm...

  • Page 48: Mechanical Features

    N20 Hardware User Guide 6 Mechanical Features 6.1 Dimensions Figure 6-1 Dimensions of N20 (unit: mm) Copyright © Neoway Technology Co., Ltd...

  • Page 49: Pcb Foot Print

    N20 Hardware User Guide 6.2 PCB Foot Print Figure 6-2 N20 PCB foot print (Top View) (unit: mm) Copyright © Neoway Technology Co., Ltd...

  • Page 50: Recommended Pcb Foot Print

    N20 Hardware User Guide 6.3 Recommended PCB Foot Print Figure 6-3 Recommended N20 PCB foot print (unit: mm) Copyright © Neoway Technology Co., Ltd...

  • Page 51: Mounting And Packaging

    Otherwise, the components inside the module might get misplaced. 7.2 Packaging N20 modules are packaged in sealed bags on delivery to guarantee a long shelf life. Package the modules again in case of opening for any reasons. If exposed to air for more than 48 hours at conditions not worse than 30 ° C/60% RH, a baking procedure should be done before SMT.

  • Page 52: Smt Temperature Curve

    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. Neoway will not provide warranty for heat-responsive element abnormalities caused by improper temperature control. Copyright © Neoway Technology Co., Ltd...

  • Page 53: Abbreviations

    Micro Controller Unit Printed Circuit Board Pulse-Coded Modulation Secure Digital Controller Single Data Rate Subscriber Identification Module Serial Peripheral Interface To Be Determined Time Division Duplex Transient Voltage Suppressor UART Universal Asynchronous Receiver-Transmitter User Identity Module Copyright © Neoway Technology Co., Ltd...

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