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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual

https://www.tuya.com

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NM1 Module Hardware Design Manual

NB-IoT Series

Issue: V1.1

Date: 2019-05-06

The Tuya Smart platform is a global intelligent platform, AI and IoT developer platform, and

world-leading voice interaction platform that provides one-stop AI and IoT solutions to meet intelligence

requirements of consumers, manufacturers, OEMs, and retail chain stores. Its solutions cover hardware

access, cloud services, and app software development, forming a closed service loop of AI and

manufacturing. It provides business group technologies and business model upgrade services for

consumer-level smart IoT devices to meet consumers' higher requirements for hardware. Tuya has

always been committed to providing customers with timely and comprehensive services. If you need any

help, contact Tuya headquarters. Tuya's contact information is as follows:

Hangzhou Tuya Inc.

Floor 7, Zheshang Fortune Center, No. 99, Gudun Road, Xihu District, Hangzhou, Zhejiang Province,

China

400-881-8611

Summary of content (29 pages)

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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual NM1 Module Hardware Design Manual NB-IoT Series Issue: V1.1 Date: 2019-05-06 The Tuya Smart platform is a global intelligent platform, AI and IoT developer platform, and world-leading voice interaction platform that provides one-stop AI and IoT solutions to meet intelligence requirements of consumers, manufacturers, OEMs, and retail chain stores.
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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual Change History Date Version Change Description Prepared By Reviewed By Approved By 2019-03-01 1.0 This is the first release. Wang Yanfeng Wang Yanfeng Chen Lihuan https://www.tuya.
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Hangzhou Tuya Inc. Notice NM1 Module Hardware Design Manual Copyright Statement Tuya reserves rights for this document and its content, which is protected by Chinese laws and related copyright laws in applicable international conventions. No part of this document may be reproduced, transmitted, distributed, or modified in any form or by any means without prior written consent of Tuya. Those who violate shall be held liable.
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Hangzhou Tuya Inc. 1 2 3 4 5 6 Contents NM1 Module Hardware Design Manual About This Document................................................................................................................................................... 6 1.1 Applicable Scope....................................................................................................................................................6 1.2 Purpose................................................................................
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Hangzhou Tuya Inc. Figures NM1 Module Hardware Design Manual Figure 2- 1 Product appearance..................................................................................................................................... 7 Figure 2- 2 Package size diagram (unit: mm)............................................................................................................... 7 Figure 2- 3 System connection framework......................................................................................
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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual 1 About This Document 1.1 Applicable Scope This document describes hardware interface specifications, electrical features, mechanical specifications, and other related information about the NM1 module to help you design and develop NM1 module hardware. 1.2 Purpose This document provides NM1 module design and development bases.
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Hangzhou Tuya Inc. 2 Product Overview NM1 Module Hardware Design Manual NM1 is a compact, high-performance, and low-power NB-IoT series module. It has the following features:  Supports the B1, B3,B5,B8, B20 frequency bands.  Provides the SIM card interface (1.8 V), USB 1.1 interface, UART interface, SPI, I2C interface, and GPIO interface. Figure 2- 1 Product appearance 2.1 Package Dimensions The NM1 module has 66 pins. Its dimensions is 17.7 2.4 mm (H) x 17.7 mm (W) x 15.8 mm (D).
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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual 2.2 Technical Parameters Table 2- 1 describes mechanical features, baseband features, RF features, technical standards, and environment features of the NM1 module.
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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual 2.3 Product Functions 2.3.1 Baseband Functions The NM1 module baseband includes the USB interface signal, SIM card interface signal, I2C interface signal, UART interface signal, working status indicator signal, module startup and reset signals, and multiplexing control signals, power supply, and grounding of multiple GPIO interfaces. Figure 2- 3 System connection framework 2.3.
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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual Table 2- 3 Line loss requirements Frequency Band Requirement LTE B5, B8, B20 Line loss < 1 dB LTE B1, B3 Line loss < 1.5 dB Table 2- 4 Antenna requirements Item Frequency band Standing wave ratio (SWR) Efficiency (%) Maximum input power (W) Input impedance (ohm) Polarization type Requirement LTE B1, B3, B5,B8, B20 ≤2 ≥ 30 50 50 Linear polarization Note: The NM1 module is being developed to support the frequency bands with an asterisk (*).
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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual 3 Interfaces 3.1 Pin Definition 3.1.1 Pin Symbols Table 3- 1 Pin symbols Pin Symbol Description I O I/O Input Output Input/Output 3.1.2 Pin Configuration Diagram Figure 3- 1 shows the NM1 module's interface pins. Figure 3- 1 Pin configuration diagram 3.1.3 Pins Table 3- 2 Interface pin definition Pin No. Analog Signal Definition Pin Attribute Input/ Output Pin Voltage (V) Remarks 1 AGND GND N/A N/A N/A 2 GPIO0 GPIO0 N/A 1.
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Hangzhou Tuya Inc. Pin No. Analog Signal Definition 3 SPI_MISO 4 SPI_MOSI 5 SPI_SCLK 6 NM1 Module Hardware Design Manual Input/ Output Pin Voltage (V) Remarks I 1.8 N/A O 1.8 N/A Serial clock signal O 1.8 N/A SPI_CS Chip selection signal O 1.8 N/A 7 PWRKEY Lower PWRKEY to power on the NM1 module. I Maximum value of VIL: 0.3 x VBAT Minimum value of VIH: 0.7 x VBAT N/A 8 GPIO22 GPIO22 N/A N/A N/A 9 ADC0 I 0–1.
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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual Pin No. Analog Signal Definition Pin Attribute Input/ Output Pin Voltage (V) Remarks 21 USB_DP USB+ signal N/A N/A N/A 22 USB_DM USB– signal N/A N/A N/A 23 USB_EINT USB_EINT 24 VIO18_EXT 1.8 V output power (In PSM mode, no voltage is output.) O Vmin = 1.53 V Vnorm = 1.8 V N/A 25 DVDD_IO NC NC NC N/A 26 NC NC N/A N/A N/A 27 GND GND N/A N/A N/A 28 UART1_RXD I 1.8 N/A 29 UART1_TXD O 1.
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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual Pin No. Analog Signal Definition Pin Attribute Input/ Output Pin Voltage (V) Remarks 44 VSYS_PA Output power O 3.3 N/A 45 GPIO11 Reserved N/A 1.8 N/A 46 GPIO10 Reserved N/A 1.8 N/A 47 GPIO25 Reserved N/A 1.8 N/A 48 MD_WAKEUP N/A N/A N/A N/A 49 GPIO28 Reserved N/A 1.8 N/A 50 AP_READY N/A N/A N/A N/A 51 STATUS N/A N/A N/A N/A 52 GPIO24 Reserved N/A 1.8 N/A 53 GPIO34 Reserved N/A 1.
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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual 3.2 Electrical Conditions Table 3- 3 Electrical conditions Signal Description VBAT_BOOST VSYS_BB VSYS_PA Input power Input power Output power Minimum Value 2.1 2.1 N/A Typical Value 3.3 3.3 3.3 Maximum Value 3.63 3.63 N/A Unit V V V 3.3 Power Interface 3.3.1 Power Pins and Grounding The NM1 module can be powered by a battery or external power supply.
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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual 3.4 SIM Card Interface 3.4.1 Pins Table 3- 4 Definition and description of SIM card interface signals Pin No. Signal Name Signal Definition Remarks SIM_DATA SIM_CLK SIM_RST SIM_VDD SIM card data pin SIM card clock pin SIM card reset pin SIM card power supply pin Voltage precision: 1.8 V±5% Maximum current: about 60 mA 11 13 12 14 3.4.
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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual 3.5 SPIs 3.5.1 Pins Table 3-7 defines the SPI signals. (SPIs support the slave mode.) Table 3- 5 SPI signal definition Pin No. 3 Signal Name SPI_MISO Function Description Master input and slave output 4 SPI_MOSI Master output and slave input 5 SPI_ SCLK SPI clock signal 6 SPI_CS SPI selection signal 3.5.2 SPI Electrical Parameters and Application The level of the SPI on the NM1 module is 1.8 V. If the host level is 3.
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Hangzhou Tuya Inc. 3.6.2 I C Interface Electrical Parameters and Application 2 NM1 Module Hardware Design Manual Figure 3- 5 Reference circuit 3.7 UART Interface 3.7.1 Pins The NM1 module provides three UART interfaces. The primary serial interface can be used for firmware upgrade. The default baud rate is 115.2 kbit/s, and the downloading baud rate is 921.6 kbit/s. You can use a log viewing tool to view logs over the debugging serial interface to debug software.
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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual Figure 3- 7 Reference circuit with a level converter A triode can also be used for level conversion. Figure 3- 8 Reference circuit with a triode for level conversion Note: Connection methods of the debugging, auxiliary, and primary serial interfaces are similar. 3.8 USB Interface 3.8.1 Pins The NM1 module has a USB 1.1 interface, which can only be used for module upgrade.
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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual 3.8.2 USB Interface Application Figure 3- 9 Downloading interface application circuit The nominated input power of the NM1 module is 3.3 V. When the USB interface is used for downloading, add an LDO circuit to keep the circuit voltage at 3.3 V. 3.9 Power-On/Power-Off and Reset Interface 3.9.1 PWRKEY Pin Table 3- 9 PWRKEY signal definition Pin No. Signal Name Function Description 7 PWRKEY NM1 module power-on 3.9.
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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual 3.9.3 RESET Pin Table 3- 10 RESET signal definition Pin No. Signal Name Function Description 15 RESET NM1 module resetting To reset the NM1 module, lower the RESET pin to a low level for a period of time and then disconnect it or raise it to a high level. 3.9.
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Hangzhou Tuya Inc. 4.3.1 RF Antenna Circuit Design NM1 Module Hardware Design Manual It is recommended that a π-type matching circuit be reserved during RF antenna peripheral circuit design. Ensure that the matching circuit is near the antenna, and attach resistors based on actual debugging conditions. By default, no resistor is attached to C1 and C2, and a 0 ohms resistor is attached to R1. The RF antenna peripheral circuit must have 50 ohms impedance.
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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual Figure 4- 2 Antenna PCB cabling impedance calculation data 4.3.2 Precautions for Initial Antenna Design 4.3.2.1 Pre-project Evaluation Ensure that the antenna is horizontal with the base station for maximum efficiency. Do not place the antenna near the power cable, data cable, or chip that may generate electromagnetic interference. Do not reserve a place for hands on the antenna to prevent attenuation caused by the human body.
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2. 3. Hangzhou Tuya Inc. NM1 Module Hardware Design Manual Place the antenna and the coaxial cable that is used to connect the antenna and NIC away from these interference sources. Place the NM1 module away from components that generate a large amount of heat such as the CPU to prevent the RF performance being affected by high temperature. 5 Production Instructions 5.
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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual Figure 5- 2 Over temperature curve To prevent the NM1 module being damaged due to overheating, you are advised to attach the module after reflow soldering of the PCB's first side. https://www.tuya.
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Hangzhou Tuya Inc. 6 Mechanical Dimensions NM1 Module Hardware Design Manual This chapter describes the mechanical dimensions of the NM1 module, in millimeters. 6.1 NM1 Module Mechanical Dimensions Figure 6- 1 Top view (unit: mm) Figure 6- 2 Side view (unit: mm) https://www.tuya.
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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual Figure 6- 3 Transparent view (unit: mm) https://www.tuya.
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Hangzhou Tuya Inc. 6.2 Recommended Package Dimensions NM1 Module Hardware Design Manual Figure 6- 4 Recommended package dimensions (unit: mm) 7 Certification FCC Statement 15.19 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. (2) This device must accept any interference received, including interference that may cause undesired operation. 15.
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Hangzhou Tuya Inc. NM1 Module Hardware Design Manual NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.