Tracker SoM Datasheet (008) T402M T404M
Functional description OVERVIEW The AssetTracker SoM is a System-on-a-Module (SoM) with: LTE Cat 1 (EMEAA, Europe only at this time) or LTE Cat M1 (North America) cellular modem GNSS (supports GPS, SBAS, QZSS, GLONASS, BeiDou, and Galileo) with up to 1.
FEATURES GNSS u-blox Neo M8U for GNSS with on-board dead-reckoning for up to 1.
Interfaces BLOCK DIAGRAM 2402-2480MHz Y1 Y2 Y3 POWER The Tracker SoM can be powered via the VIN (3.88V-12VDC) pin, over USB, or a LiPo battery. VIN The input voltage range on VIN pin is 3.88VDC to 12VDC. When powering from the VIN pin alone, make sure that the power supply is rated at 10W (for example 5 VDC at 2 Amp). If the power source is unable to meet this requirement, you'll need connect the LiPo battery as well.
to the polarity of the connector. A LiPo battery with internal protection circuits is recommended. Typical current consumption is around 180mA and up to 1.8A transients at 5VDC. In deep sleep mode, the quiescent current is 130uA [this value may change] (powered from the battery alone). The MAX17043 fuel gauge is only compatible with single cell lithium-ion batteries. The state-ofcharge (SoC) values will not be accurate with other battery chemistries.
PMID This pin is the output of the internal boost regulator of the PMIC that can source 5.1VDC from the battery in OTG (On The Go) mode. This feature is useful when your circuitry needs a 5V source from the module when powered by the battery alone. The confusing bit about this pin is that it will continue to provide 5.1VDC but only when the input voltage (VIN) is between 3.6V to 5.1VDC. As soon as the input voltage exceeds this limit, the PMID starts tracking that voltage.
GNSS Antenna As the GNSS system is receive-only (no transmitter), you can use any GNSS compatible antenna without affecting the certification. Different GNSS systems use different frequencies. Many antennas are tuned to the United States GPS system, however you can also get multi-GNSS antennas that are compatible with other systems. All of these systems offer coverage world-wide.
Wi-Fi Antenna The Tracker SoM has been certified with the following Wi-Fi antenna. Note: The same external antenna model is used for Wi-Fi and BLE. Antenna SKU Links Particle Wi-Fi Antenna 2.4GHz, [x1] ANT-FLXV2 Datasheet | Retail Store Particle Wi-Fi Antenna 2.4GHz, [x50] ANT-FLXV2-50 Datasheet Measurement Value Peak gain 2.0 dBi Frequency 2400 - 2500 MHz Impedance 50Ω Size 45.1 x 7.4 x 1.0mm BLE Antenna The Tracker SoM includes a built-in chip antenna for BLE with a peak gain of 0 dBi.
PERIPHERALS AND GPIO There are 10 exposed GPIO lines labeled A0-A7, TX, and RX. These multi-function pins can be configured for use as GPIO or other interfaces like SPI and I2C. Shared Peripherals Qty Input(I) / Output(O) Digital 10 (max) I/O Analog (ADC) 8 (max) I UART 1 I/O SPI 1 I/O I2C 1 I/O PWM 10 (max)1 O Peripheral Type Qty Input(I) / Output(O) 1PWM USB 1 I/O NFC Tag 1 O CAN Bus 1 I/O is divided into three PWM groups.
Memory map NRF52840 FLASH LAYOUT OVERVIEW Bootloader (48KB, @0xF4000) User Application (128KB, @0xD4000) System (656KB, @0x30000) SoftDevice (192KB) EXTERNAL SPI FLASH LAYOUT OVERVIEW (DFU OFFSET: 0X80000000) OTA (1500KB, @0x00689000) Reserved (420KB, @0x00620000) FAC (128KB, @0x00600000) Reserved (2MB @0x00400000) LittleFS (4MB, @0x00000000)
Pins and connectors Circular labels are as follows: Label Purpose 1 Quectel cellular modem antenna 2 Wi-Fi antenna for Wi-Fi geolocation (optional) 3 External Bluetooth (optional) 4 Built-in Bluetooth chip antenna 5 Quectel GNSS antenna (optional) 6 u-blox GNSS antenna (GPS) 7 u-blox Neo M8 GNSS (GPS) 8 Quectel cellular modem
SOM PIN DESCRIPTION Connected # Pin Function To Description Right Side 1 GND POWER 2 GNSS_BAT 3 GNSS_RESET IO GNSS & IOEX 4 GNSS_VBUS USB PWR GNSS GNSS USB power. Optional. 5 GNSS_P USB D+ GNSS GNSS USB interface D+. Optional. 6 GNSS_N USB D- GNSS GNSS USB interface D-. Optional. 7 GNSS_PULSE OUT GNSS GNSS time pulse output. Can be used for a GNSS fix LED.2 8 GND POWER 9 NC 10 GND POWER 11 WIFI_EN IO WIFI & IOEX ESP32 enable.
41 A4 IO 42 GND POWER nRF52 A4, D4, SPI MOSI Ground Top Side 43 GND POWER 44 NC SOM44 45 3V3 46 TS 47 PMID 48 GND 49 VIN 50 STAT 51 VBUS 52 GND POWER 53 LI+ POWER Ground Leave unconnected. POWER OUT IN POWER OUT TPS62291 IN peripheral use. PMIC Battery temperature sensor PMIC PMIC power output in OTG mode. POWER POWER 3.3V power output. 1000 mA maximum include nRF52 and other Ground PMIC Power input 3.88VDC to 12VDC. PMIC charge status.
80 NC SOM80 Leave unconnected. 81 NC SOM81 Leave unconnected. 82 NC SOM82 Leave unconnected. 83 CELL_GPS_RX IN CELL Cellular modem GPS serial RX data. 84 CELL_GPS_TX OUT CELL Cellular modem GPS serial TX data. 85 CELL_RI OUT CELL Cellular modem ring indicator output. 86 GND POWER 87 CELL_GPS_RF RF 88 GND POWER Ground 89 GND POWER Ground 90 GNSS_BOOT Ground CELL Cellular modem GPS antenna. Optional.
System peripheral GPIO Name Description Location BTN MODE Button P1.13 PMIC_INT PMIC Interrupt P0.26 LOW_BAT_UC Fuel Gauge Interrupt RTC_INT IOEX 0.0 Real-time clock Interrupt P0.27 Cellular module reset P0.7 BGPWR Cellular module power P0.8 BGVINT Cellular power on detect P1.14 BGDTR Cellular module DTR BGRST IOEX 1.5 CAN_INT CAN interrupt P1.9 CAN_RST CAN reset IOEX 1.6 CAN_PWR 5V boost converter enable IOEX 1.7 CAN_STBY CAN standby mode IOEX 0.
Technical specifications ABSOLUTE MAXIMUM RATINGS Parameter Symbol Min Typ Max Unit Supply Input Voltage VIN -2.0 +22.0 V Supply Input Current IIN-MAX-L 1.5 A VBUS USB supply voltage VUSB +5.8 V Supply Output Voltage VIN +4.8 V Supply Output Voltage V3V3 +3.3 V Supply Output Current I3V3-MAX-L LiPo Battery Voltage VLiPo Supply CAN Supply Voltage -0.3 800 mA -0.5 +6.0 V 5 V CAN Supply Current 400 mA I/O pin voltage VI/O IO -0.3 +3.
RECOMMENDED OPERATING CONDITIONS Parameter Symbol Min Typ Max Unit Supply voltages Supply Input Voltage VIN 3.9 VBUS USB supply voltage VUSB 4.35 LiPo Battery Voltage VLiPo 3.6 5.0 17.0 V 5.5 V 4.3 V Environmental Normal operating temperature1 -20 +25 +753 °C Extended operating temperature2 -40 +85 °C 95 % Humidity Range Non condensing, relative humidity Notes: 1 Normal operating temperature range (fully functional and meet 3GPP specifications).
GNSS SPECIFICATIONS u-blox NEO-M8U untethered dead reckoning module including 3D inertial sensors SPI Interface Supports GPS L1C/A, SBAS L1C/A, QZSS L1C/A, QZSS L1-SAIF, GLONASS L1OF, BeiDou B1I, and Galileo E1B/C Parameter Specification Dynamics operational limit1 ≤ 4g Altitude operational limit1 50000 m Velocity operational limit1 500 m/s Velocity accuracy2 0.
12 CEP, 50%, 24 hours static, -130 dBm, > 6 SVs GNSS GPIO: Name GPS_PWR GPS_INT Description Location u-blox GNSS power IOEX 0.6 u-blox GNSS interrupt IOEX 0.7 GPS_BOOT u-blox GNSS boot mode GPS_RST u-blox GNSS reset GPS_CS CAN SPI Chip Select IOEX 1.0 IOEX 1.
CAN SPECIFICATIONS Microchip MCP25625 CAN Controller with Integrated Transceiver SPI Interface Implements CAN2.
Recessive: Differential Output Voltage -120 500 CANH: Short-Circuit Output Current IO(SC) -120 CANL: Short-Circuit Output Current Recessive Differential Input Voltage Dominant Differential Input Voltage 0 12 mV TXD = VDDA; RL =50 to 65Ω 0 50 mV TXD = VDDA; No load 85 75 VDIFF(R) (I) VDIFF(D) (I) mA 120 mA -1.0 +0.5 V -1.0 +0.4 V 0.9 5.0 V 1.0 5.
OTHER COMPONENTS IMU (Inertial Measurement Unit) Bosch Sensortec BMI160 SPI Interface connected to SPI1 (MISO1, MOSI1, SCK1) Chip Select: SEN_CS (CS Decoder 2) Can wake nRF52 MCU on movement (SEN_INT1) 16 bit digital, triaxial accelerometer and triaxial gyroscope Very low power consumption: typically 925 μA with accelerometer and gyroscope in full operation Allocatable FIFO buffer of 1024 bytes (capable of handling external sensor data) Hardware sensor time-stamps for accurate sensor data fusion Integrated
Wi-Fi Geolocation The Wi-Fi module is intended for Wi-Fi geolocation only. It cannot be used as a network interface instead of using cellular. An external service provider such as the Google Geolocation Service is required for mapping Wi-Fi networks to a location. ESP32-D2WD SPI Interface Connected to SPI1 (MISO1, MOSI1, SCK1) Chip Select: WIFI_CS (CS Decoder 3) Interrupt: ESP32 IO4 is connected to MCP23S17 I/0 Expander GPA4.
Band 7 (2600 MHz) WCDMA Bands Band 8 (900 MHz) Band 1 (2100) GSM Bands EGSM900 (900 MHz) DCS1800 (1800 MHz) Power class Class 4 (33dBm ± 2dB) for EGSM900 Class 1 (30dBm ± 2dB) for DCS1800 Class E2 (27dBm ± 3dB) for EGSM900 8-PSK Class E2 (26dBm ± 3dB) for DCS1800 8-PSK Class 3 (24dBm ± 3dB) for WCDMA bands Class 3 (23dBm ± 2dB) for LTE FDD bands 4G LTE cellular characteristics for BG96-MC (US) Parameter RAT Value LTE Cat M1 EGPRS LTE FDD Bands Band 12 (700 MHz) Band 13 (700 MHz) Band 5 (850 MHz)
I/O CHARACTERISTICS These specifications are based on the nRF52840 datasheet. Symbol Parameter VIH Input high voltage VIL Input low voltage VOH,SD Max Unit 0.7 xVDD VDD V VSS 0.3 xVDD V Output high voltage, standard drive, 0.5 mA, VDD ≥1.7 VDD - 0.4 VDD V VOH,HDH Output high voltage, high drive, 5 mA, VDD >= 2.7 V VDD - 0.4 VDD V VOH,HDL Output high voltage, high drive, 3 mA, VDD >= 1.7 V VDD - 0.4 VDD V VOL,SD Output low voltage, standard drive, 0.5 mA, VDD ≥1.
Mechanical specifications DIMENSIONS AND WEIGHT Parameter Value Units Width 28 mm Length 93 mm Thickness Weight Weight will be provided at a later date. MECHANICAL DRAWING Will be provided at a later date. Dimensions are in millimeters.
SCHEMATICS MCU Cellular
GNSS Wi-Fi
CAN User I/O
PMIC Fuel Gauge Cell Control
I/O Expander QSPI Flash RTC/Watchdog
IMU 3V3 Regulator LAYOUT CONSIDERATIONS Will be provided at a later date.
Certification FCC (UNITED STATES) Warning: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. 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.
INDUSTRY CANADA (IC) IC ID: 20127-T40X This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: this device may not cause interference. this device must accept any interference, including interference that may cause undesired operation of the device. Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence.
Product Handling ESD PRECAUTIONS The Tracker SoM contains highly sensitive electronic circuitry and is an Electrostatic Sensitive Device (ESD). Handling an module without proper ESD protection may destroy or damage it permanently. Proper ESD handling and packaging procedures must be applied throughout the processing, handling and operation of any application that incorporates the module. ESD precautions should be implemented on the application board where the B series is mounted.
Default settings The AssetTracker SoM comes pre-programmed with a bootloader and a user application called Tinker. This application works with an iOS and Android app also named Tinker that allows you to very easily toggle digital pins, take analog and digital readings and drive variable PWM outputs. The bootloader allows you to easily update the user application via several different methods, USB, OTA, Serial Y-Modem, and also internally via the Factory Reset procedure.
Ordering Information SKU Description Packaging T523 Family (Europe) T523MEA Tracker SoM LTE CAT1/3G/2G (Europe), [x1] Each T523MTY Tracker SoM LTE CAT1/3G/2G (Europe), Tray [x50] Tray (50) T523MKIT Tracker SoM LTE CAT1/3G/2G (Europe) Evaluation Kit, [x1] Each T402 Family (North America) T402MEA Tracker SoM LTE M1 (NorAm), [x1] Each T402MTY Tray (50) Tracker SoM LTE M1 (NorAm), Tray [x50] T402MKIT Tracker SoM LTE M1 (NorAm) Evaluation Kit, [x1] Each
Revision history Revision Date Author Comments pre1 2020 Mar 31 RK Preview Release 1 pre2 2020 May 12 RK Added partial dimensions 001 2020 Jun 29 RK First release 002 2020 Jul 10 RK Updated absolute maximum ratings, schematics 003 2020 Jul 17 RK Updated absolute maximum ratings 004 2020 Jul 30 RK Added explanation of DIV connector 005 2020 Aug 06 RK Added crystal to block diagram, added FCC information 006 2020 Aug 18 RK Added IC (Canada) information 007 2020 Sep 08 RK Add
