Sfera Labs Strato Pi Max XL User Manual
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Sfera Labs Strato Pi Max XL User Manual

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Strato Pi Max User Guide
March 2024
Revision 001
SCMX10XL4A Strato Pi Max XL with CM4 Wireless, 2GB RAM, Lite
SCMX10XL4B Strato Pi Max XL with CM4 Wireless, 4GB RAM, Lite
SCMX10XL4C Strato Pi Max XL with CM4 Wireless, 8GB RAM, Lite
SCMX10XL4F Strato Pi Max XL with CM4 Wireless, 2GB RAM, 16GB eMMC
SCMX10XL4G Strato Pi Max XL with CM4 Wireless, 4GB RAM, 16GB eMMC
SCMX10XL4H Strato Pi Max XL with CM4 Wireless, 8GB RAM, 16GB eMMC
SCMX10XL4K Strato Pi Max XL with CM4 Wireless, 2GB RAM, 32GB eMMC
SCMX10XL4L Strato Pi Max XL with CM4 Wireless, 4GB RAM, 32GB eMMC
SCMX10XL4M Strato Pi Max XL with CM4 Wireless, 8GB RAM, 32GB eMMC
SCMX10XLZA Strato Pi Max XL with Zymbit SCM4 Wireless, 2GB RAM, 16GB eMMC
SCMX10XLZB Strato Pi Max XL with Zymbit SCM4 Wireless, 8GB RAM, 32GB eMMC
SCMX10XS4A Strato Pi Max XS with CM4 Wireless, 2GB RAM, Lite
SCMX10XS4B Strato Pi Max XS with CM4 Wireless, 4GB RAM, Lite
SCMX10XS4C Strato Pi Max XS with CM4 Wireless, 8GB RAM, Lite
SCMX10XS4F Strato Pi Max XS with CM4 Wireless, 2GB RAM, 16GB eMMC
SCMX10XS4G Strato Pi Max XS with CM4 Wireless, 4GB RAM, 16GB eMMC
SCMX10XS4H Strato Pi Max XS with CM4 Wireless, 8GB RAM, 16GB eMMC
SCMX10XS4K Strato Pi Max XS with CM4 Wireless, 2GB RAM, 32GB eMMC
SCMX10XS4L Strato Pi Max XS with CM4 Wireless, 4GB RAM, 32GB eMMC
SCMX10XS4M Strato Pi Max XS with CM4 Wireless, 8GB RAM, 32GB eMMC
SCMX10XSZA Strato Pi Max XS with Zymbit SCM4 Wireless, 2GB RAM, 16GB eMMC
SCMX10XSZB Strato Pi Max XS with Zymbit SCM4 Wireless, 8GB RAM, 32GB eMMC



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Summary of Contents for Sfera Labs Strato Pi Max XL

  • Page 1 SCMX10XL4L Strato Pi Max XL with CM4 Wireless, 4GB RAM, 32GB eMMC SCMX10XL4M Strato Pi Max XL with CM4 Wireless, 8GB RAM, 32GB eMMC SCMX10XLZA Strato Pi Max XL with Zymbit SCM4 Wireless, 2GB RAM, 16GB eMMC SCMX10XLZB Strato Pi Max XL with Zymbit SCM4 Wireless, 8GB RAM, 32GB eMMC...

  • Page 2: Table Of Contents

    Safety information Qualified personnel Hazard levels Safety instructions General safety instructions Battery Introduction Features Device identification Hardware setup Connections Opening the case Closing the case Compute Module board installation How to flash the eMMC microSD installation Replacing the RTC backup battery Terminal blocks Power supply PWR LED...
  • Page 3 Advanced usage Compute Module I²C bus addresses RP2040 I²C bus addresses I²C Configuration and control registers map RP2040 firmware upload and programming Thermal considerations for Strato Pi Max Block diagram Technical specifications Dimensions Disposal Installation and use restrictions Standards and regulations Safety instructions Set-up Conformity Information...
  • Page 4 Please download and read the Sfera Labs Terms and Conditions document available at: http://www.sferalabs.cc Strato and Sfera Labs are trademarks of Sfera Labs S.r.l. Other brands and names may be claimed as the property of others. 
 Copyright © 2024 Sfera Labs S.r.l. All rights reserved.

  • Page 5: Safety Information

    Safety information Carefully and fully read this user guide before installation and retain it for future reference. Qualified personnel The product described in this manual must be operated only by personnel qualified for the specific task and installation environment, in accordance with all relevant documentation and safety instructions.

  • Page 6: Safety Instructions

    Safety instructions General safety instructions Protect the unit against moisture, dirt and any kind of damage during transport, storage and operation. Do not operate the unit outside the specified technical data. Never open the housing. If not otherwise specified, install in closed housing (e.g. distribution cabinet).

  • Page 7: Battery

    Battery Strato Pi Max uses a small lithium non-rechargeable battery to power its internal real time clock (RTC). WARNING Improper handling of lithium batteries can result in an explosion of the batteries and/or release of harmful substances. Worn-out or defective batteries can compromise the function of this product. Replace the RTC lithium battery before it is completely discharged.

  • Page 8: Introduction

    It is available in two versions: • Strato Pi Max XL, with four expansion slots and housed in a 9 modules DIN rail case • Strato Pi Max XS, with one expansion slots and housed in a 6 modules DIN rail case.

  • Page 9: Features

    ✓ flexible mass storage options: eMMC, dual microSD, high performance M.2 PCIe SSD ✓ dual microSD card architecture. Strato Pi Max XL routes its two microSD card holders to the Compute Module through a high-speed switching matrix, controlled by the on- board RP2040 microcontroller.
  • Page 10 other available as additional storage. This enables for separate OS/data storage, SD redundancy and in-field full-system upgrades. The microSD slots are hidden, and can be accessed opening the case ✓ 9 modules DIN rail case Strato Pi Max XS: ✓ 1 internal expansion slot. Installed boards are detected and identified for automatic configuration.

  • Page 11: Device Identification

    The device can be identified with the information provided in the rating and identification plate, permanently attached to the side of the case. EXAMPLE STRATO PI MAX XL RATING AND IDENTIFICATION PLATE EXAMPLE STRATO PI MAX XS RATING AND IDENTIFICATION PLATE...

  • Page 12: Hardware Setup

    Hardware setup Connections STRATO PI MAX CONNECTIONS For the initial set-up, the plastic DIN rail enclosure may have to be removed to access the circuit boards and internal connectors, to install or remove the Compute Module, the microSD cards, the M.2 PCIe SSD, or the expansion boards. NOTICE Before opening the Strato Pi Max enclosure, disconnect all power sources and any connection to external devices, including USB and Ethernet cables.

  • Page 13: Closing The Case

    Closing the case 6. Remove the front panel. This will help aligning the circuit boards assembly with the case walls 7. If the optional Compute Module 4 Antenna Kit is installed, connect the U.FL connector on the cable to the U.FL-compatible connector on Compute Module 8.

  • Page 14: How To Flash The Emmc

    Strato Pi Max XL has two microSD slots to install flash memory cards. The microSD slots are not directly accessible with the case closed. The slots are located on the bottom side of the main circuit board.
  • Page 15 The battery is only used to power the RTC chip when the main power is not available. Depending on operating conditions it should last three or more years if the Strato Pi Max is not powered, or up to the battery's lifetime if it regularly receives external power. The RTC backup battery holder is on the vertical circuit board, next to the Compute Module area.

  • Page 16: Terminal Blocks

    RTC BACKUP BATTERY HOLDER Terminal blocks Strato Pi Max has a two-poles 5.08 mm pitch pluggable terminal block for the power supply connection. The maximum conductor cross section is 3.31 mm (12 AWG). Recommended stripping length is 7 mm. Screw thread is M3. Never exceed 0.5 Nm torque when tightening the screws.

  • Page 17: Software Installation And Configuration

    Software installation and configuration All features of Strato Pi Max can be used with any operating system, programming language or framework compatible with Raspberry Pi. The following sections describe how to install drivers for the Raspberry Pi OS or to access its features from alternative set-ups.

  • Page 18: Alternative Set-Up

    Refer to the following instructions to download and install the module or go to: https://github.com/sfera-labs/rtc-pcf2131 for updated instructions. Download and install: $ sudo apt install git raspberrypi-kernel-headers $ git clone --depth 1 https://github.com/sfera-labs/rtc-pcf2131 $ cd rtc-pcf2131 $ make clean $ make $ sudo make install $ dtc -@ -Hepapr -I dts -O dtb -o rtc-pcf2131.dtbo rtc-pcf2131.dts $ sudo cp rtc-pcf2131.dtbo /boot/overlays/...

  • Page 19: Using Strato Pi Max

    SD matrix Strato Pi Max XL implements a flexible dual microSD card architecture. Strato Pi Max XL routes its two microSD card holders to the Compute Module through a high-speed switching matrix, controlled by the on-board microcontroller. Each SD card can be set as the boot card, with the other available as additional storage.
  • Page 20 Strato Pi Max XL has two microSD slots, called SDA and SDB, and the SD matrix allows 2x2 connections between both SD/SD1 interfaces and the SDA/SDB slots. NOTICE Disconnecting an SD card from the Compute Module's SD interfaces when partitions from the card are mounted at the operating system level, can result in file system and data...

  • Page 21: Usb Ports Power Management

    SD MATRIX BOOT FROM SDB Finally, with the SD interface connected to SDB for boot, the SDA slot can be enabled to be used for additional storage. SD MATRIX BOOT FROM SDB AND SDA ENABLED FOR ADDITIONAL STORAGE It is also possible to disable both the SD and SD1 interfaces. This configuration could be used with the Compute Module versions that have the embedded eMMC storage or the M.2 PCIe SSD, when no external SD card is needed.

  • Page 22: Atecc608 Secure Element

    ATECC608 secure element Strato Pi Max embeds the ATECC608A or ATECC608B (depending on production lot) secure element chip from Microchip. The ATECC608 is connected to the Raspberry Pi Compute Module via the I²C bus (default address: 0x60). Its key features are: ✓...

  • Page 23: Power Supply

    Under Linux the green LED will flash to signify eMMC access. If any error occurs during booting, then this LED will flash an error pattern which can be decoded using the look up table on the Raspberry Pi website. The red ACT LED replicates the red power LED on the Raspberry Pi 4 Model B. The red and green USR LEDs are controlled by the RP2040 firmware and can be configured by the user.

  • Page 24: 3-Axis Accelerometer

    A temperature sensor, located on the vertical circuit board, can be used to monitor the current temperature. In the factory default configuration, Strato Pi Max automatically starts the fan when the internal temperature reaches 55 °C and stops when temperature falls below 50 °C. 3-axis accelerometer Strato Pi Max embeds the IIS2DLPC high-performance three-axis linear accelerometer with digital I²C interface connected to the RP2040 I²C bus.
  • Page 25 Advanced usage Compute Module I²C bus addresses The following table lists all components connected to the Compute Module I²C bus, and their R/W addresses. ADDR WRITE READ LM75ADP 0x48 [1001000] 0x90 0x91 PCF2131 0x53 [01010011] 0xA6 0xA7 ATECC608 BU30 0x60 [1100000] 0xC0 0xC1 RP2040 (slave)
  • Page 26 I²C Configuration and control registers map The following paragraphs list the available control and configuration registers available at address 0x35 on the I2C1 bus. Additional registers might be available when expansion boards are installed. Refer to the user guide of the specific expansion board for details.
 
...
  • Page 27 Bit 7-0 CMD: command 2 = Restore factory default configuration 3 = Save current configuration to be retained across power cycles.
 Affected values are highlighted in ITALIC in the following tables Register 6 (R) Result of command written to register 5 Bit 7-0 CMD: processed command Bit 8...
  • Page 28 GREEN LED ADDR BYTE 1 BYTE 0 T ON T OFF Register 22 (RW) Bit 15-0 T ON: LED cycle ON time in milliseconds Register 23 (RW) Bit 15-0 T OFF: LED cycle OFF time in milliseconds RED LED ADDR BYTE 1 BYTE 0 T ON...
  • Page 29 Register 32, …, 35 (R) Bit 8-0 TYPEn: Expansion board n type 2 = Uninterruptible Power Supply 3 = CAN and dual RS-485 4 = RS-232 and RS-485 5 = Industrial digital I/O SD CARD SWITCH ADDR BYTE 1 BYTE 0 SD1
...
  • Page 30 PCIE ADDR BYTE 1 BYTE 0 Register 42 (RW) Bit 0 EN: PCIe control 0 = disabled (default) 1 = enabled Bit 2 DEF: power-up default 0 = disabled (default) 1 = enabled WATCHDOG ADDR BYTE 1 BYTE 0 TIMEOUT DOWN DELAY SD SWITCH PCIE PWR...
  • Page 31 Register 51 (RW) Bit 15-0 SD SWITCH: SD switch control after power cycle triggered by watchdog 0 = SD switch disabled (default) N > 0 = switch SDA/SDB after N consecutive watchdog resets, if no heartbeat is detected. It requires the watchdog being enabled (EN = 1) in the saved configuration Register 52 (RW) Bit 15-0...
  • Page 32 Register 57 (RW) Bit 15-0 DOWN DELAY: shutdown delay from the moment it is enabled, in seconds (default = 60) Register 58 (RW) Bit 15-0 OFF TIME: duration of power-off, in seconds (default = 5) Register 59 (RW) Bit 15-0 UP DELAY: power-up delay after main power is restored, in seconds
...
  • Page 33 RP2040 firmware upload and programming WARNING The RP2040 microcontroller firmware implements critical logic and checks to ensure safe and reliable operations of Strato Pi Max including, but not limited to, fan thresholds setup for heat dissipation, watchdog, microSD switch matrix control, mass storage boot sequence control, power distribution voltages, currents and internal temperature monitoring.
  • Page 34 Thermal considerations for Strato Pi Max The Raspberry Pi Compute Module draws power and generates heat proportionally to CPU and GPU load. The Strato Pi Max main regulator, battery charger and VSO regulator also generate a substantial heat proportionally to the total amount of current that has to be supplied to the Pi and, if present, external devices.
  • Page 35 Block diagram Strato Pi Max User Guide...
  • Page 36 Strato Pi Max User Guide...
  • Page 37 Strato Pi Max User Guide...
  • Page 38 Strato Pi Max User Guide...
  • Page 39 Strato Pi Max User Guide...
  • Page 40 Raspberry platform compatibility Raspberry Pi Compute Module 4 Zymbit SCM4 EXPANSION SLOTS Sfera Labs X2 1 slot, Strato Pi Max XS 4 slots, Strato Pi Max XL PCIe M.2 form factor 2242 REAL TIME CLOCK Oscillator frequency 32768 kHz Frequency Tolerance ±3 ppm...
  • Page 41 SRAM r/w cycles Infinite EEPROM store cycles > 1000000 Data retention > 200 years ACCELEROMETER Range ±2g/±4g/±8g/±16g full scale Data rates from 1.6 Hz to 1600 Hz Bandwidth up to 800 Hz INTERNAL TEMPERATURE SENSORS Temperature accuracy ±2 °C Resolution 11 bits (0.125 °C) INTERNAL POWER SUPPLY VOLTAGE SENSOR Voltage range...
  • Page 42 9 module Din Rail enclosure width: 160.2 mm Dimensions, Strato Pi Max XL height: 90.5mm depth: 62.0mm 6 module Din Rail enclosure width: 106.5 mm Dimensions, Strato Pi Max XS height: 90.5mm depth: 62.0mm 260 g (including Raspberry Pi Compute Module, Weight, Strato Pi Max XL M.2 PCIe SSD;...
  • Page 43 Dimensions DIMENSIONS (mm) Strato Pi Max User Guide...
  • Page 44 Disposal Waste Electrical & Electronic Equipment (Applicable in the European Union and other European countries with separate collection systems). This marking on the product, accessories or literature indicates that the product should not be disposed of with other household waste at the end of their working life. To prevent possible harm to the environment or human health from uncontrolled waste disposal, separate these items from other types of waste and recycle them responsibly to promote the sustainable reuse of material resources.
  • Page 45 Conformity Information This device complies with the following applicable European Community harmonised standards: ✓ 2014/30/EU - Electromagnetic Compatibility Directive (EMC) ✓ 2011/65/EU and 2015/863/EU - Restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS 3) The following harmonised standards have been used to demonstrate conformity to these directives: ✓...
  • Page 46 CANADA This Class B digital apparatus complies with Canadian ICES-003. Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada. RCM AUSTRALIA / NEW ZEALAND This product meets the requirements of the standard EN 61000-6-3: 2021 - Emission for residential, commercial and light-industrial environments.

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