Digi Connectcore Mp15 Development Board Instruction Manual

Connect Core MP15
Development Board
Hardware Reference Manual

Connect Core MP15 Development Board

Revision history—90002511

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© 2022 Digi International Inc. All rights reserved.

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Information in this document is subject to change without notice and does not represent a commitment on the part of Digi International. Digi provides this document “as is,” without warranty of any kind, expressed or implied, including, but not limited to, the implied warranties of fitness or merchantability for a particular purpose. Digi may make improvements and/or changes in this manual or in the product(s) and/or the program(s) described in this manual at any time.

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Customer support
Gather support information: Before contacting Digi technical support for help, gather the following information:

• Product name and model
• Product serial number (s)
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• Logs (from time of reported issue)
• Trace (if possible)
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• Steps to reproduce

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Include the document title and part number (Connect Core MP15 Development Board, 90002511 1P) in the subject line of your email.

About the Connect Core MP15

The Digi Connect Core® MP15 development kit and System-on-Module (SOM) platform is a highly integrated, cost-effective, connected, secure embedded solution, built on the STM32MP15x MPU family. It integrates memory, power management, the Digi Microcontroller Assist™, pre-certified wireless connectivity and advanced Digi Trust Fence device security with a complete, open-source Linux software platform based on the Yocto Project.
Note While the Connect Core MP15 system-on-module is designed to be used in a production environment, the Connect Core MP15 Development Kit is designed only for development and testing in a pre-production environment.

Features and functionality

• ConnectCore MP15 module
  • STM32MP157C dual ARM Cortex-A7 and single Cortex-M4 cores operating at speeds up to 800MHz
  • Up to 1 GB, 16-bit DDR3 memory
  • Up to 1 GB, 8-bit SLC NAND flash memory
  • IEEE 802.11 a/b/g/n/ac WLAN and Bluetooth 5.0
• Power
  • Power jack or industrial-dedicated 5V power connector
  • Coin-cell battery charger, supplying the on-module RTC
  • Power and reset buttons
• Boot source configuration
  • NAND, USB, microSD
• Debug
  • Standard IEEE 1149.1 JTAG interface
  • Serial console at AB-type micro-USB connector and TTL level n Multimedia
  • MIPI DSI display
  • HDMI display (through MIPI-to-HDMI transceiver)
  • Parallel 24-bit LCD interface with FFC on-board connector
  • LVDS interface with up to four differential data pairs (through parallel-to-LVDS transceiver)
  • 8-bit parallel camera
  • Audio CODEC with the following functionality
    o One 3.5 mm headphone jack
    o One 3.5 mm microphone jack
    o Two speaker outputs
    o One line-out output
    o Two line-in inputs
• Storage
  • NAND flash
  • microSD card slot
• Communication
  • RS-232
  • RS-485
  • Two CAN
  • Gigabit Ethernet
  • Two USB Host 2.0 interfaces through a stacked USB A type connector
  • USB OTG with AB-bye micro-USB connector
  • SISO IEEE 802.11 a/b/g/n/ac + Bluetooth 5.0 with on-module U.FL or external SMA antenna connector
  • PCI Express Mini Card slot supporting full and half-size cards
  • Mikro Bus socket
  • XBee socket supporting XBee Cellular
• User interface
  • Three user LED, two of them shared with user buttons
• Dimensions:
  • 120 x 160 mm

Safety instructions

• The ConnectCore MP15 development board development board cannot be guaranteed operation due to the radio link and so should not be used for interlocks in safety critical devices such as machines or automotive applications.
• The ConnectCore MP15 development board development board has not been approved for use in (this list is not exhaustive):
  • nuclear applications
  • explosive or flammable atmospheres
• There are no user serviceable components inside the ConnectCore MP15 development board development board. Do not modify the Connect Core MP15 development board in any way. Modifications may exclude the development board from any warranty and can cause the
  Connect Core MP15 development board to operate outside of regulatory compliance for a given country, leading to the possible illegal operation of the radio.
• Use industry standard ESD protection when handling the ConnectCore MP15 development board development board.
• Take care while handling to avoid electrical damage to the PCB and components.
• Do not expose Connect Core MP15 development board development board to water or moisture.
• Use this product with the antennas specified in the ConnectCore MP15 development board development board user guides.

Block diagram

Placement

Top view

Bottom view

Note Serigraphy on the bottom side of the PCB is incorrect. Refer to schematics and CAD documentation for correct identification of the connectors.

Connectors

The following table lists all connectors on the Connect Core MP15 development board:

Interfaces

The following interfaces are available on the ConnectCore MP15 development board:

Power interfaces

This section describes the Connect Core MP15 development board power interfaces.

DC-in jack connector
The input voltage of the Connect Core MP1 Development Board is 5V. This input power supply can be provided from two different connectors:

• DC-in power jack.
• J7, a 2-pin, 2.54 mm pitch connector:

Note Digi recommends not powering both connectors at the same time.
An overvoltage circuit protects the board from overvoltage and overcurrent events. Downstream from these input power protections, there are two regulators/switches for powering the carrier board circuitry:

• 5V Load switch (U6): A 5V load switch that controls the power delivery to different interfaces on the carrier board.
• PCIe regulator (U7): A dedicated adjustable regulator for the PC I.e. socket.

Coin cell connector
Connector J10 on the board is included for attaching an external coin-cell to the system:

Power and reset buttons
One power button (SW1) and one reset button (SW2) are included on the development board.

System boot

The Connect Core MP1 module supports different boot modes (see the Connect Core MP1 System-on Module Hardware Reference Manual for detailed information). The development board supports these boot modes, although some of them require changes to the populated components. A quadruple switch (S1) allows swapping between eight different boot modes:

Debug interfaces

JTAG
The ConnectCore MP15 Development Board provides a Tag Connect footprint for accessing the STM32MP1 JTAG debug port. Additionally, a standard 10-pin, 1.27mm pitch connector (J21) is available for accessing the JTAG interface:

Console port
A dedicated USB micro AB-type port (J14) provides access to the console port of the ConnectCore MP1 system-on-module. This USB port is routed directly to the CY7C65211 bridge, which converts the USB bus into TTL level. UART4 is used as the console debug port of the STM32MP1 CPU. This UART can also be accessed directly at TTL level through J20 connector:

Default console port settings:

• Baud rate: 115200
• Data: 8 bit
• Parity: none
• Stop: 1 bit
• Flow control: none

Multimedia

Parallel/LVDS display
The ConnectCore MP15 provides a 24-bit RGB LCD interface available through a 40-pin, 0.5 mm pitch, FFC connector. Backlight control signal, I2C port, and interrupt line for the touch screen panel are available on the LCD connector.
The following table shows the pinout of the parallel display connector (J26):

This same parallel display bus is connected to a parallel-to-LVDS transceiver, allowing support for LVDS displays through a 20-pin, 1.25 mm pitch connector (J27). This means that parallel and LVDS connectors cannot be used simultaneously.
This LVDS connector also provides backlight control signal, I2C port, and an interrupt line for the touch screen panel:

MIPI/HDMI display
The ConnectCore MP1 system-on-module supports only one MIPI-DSI display interface. On the development board, this MIPI-DSI display is managed so that two different display interfaces are supported, although only one of them can work at a time:

• HDMI: The Lontium LT8912B bridge is populated on the development board to adapt the MIPIDSI interface to HDMI. This HDMI interface is available over a standard HDMI connector.
• MIPI-DSI: the native MIPI-DSI interface of the SOM is available over a 20-pin connector (J44):

Parallel camera
The Connect Core MP15 Development Board provides a parallel camera sensor interface (CSI), available over a 30-pin, 0.5 mm pitch FFC connector (P1):

Audio
The Maxim MAX98089 audio codec manages the audio interface on the development board. The board provides the following audio functionality:

• 3.5 mm headphone jack
• 3.5 mm microphone jack
• x2 speaker outputs (left and right)
• x1 line-out output
• x2 line-in inputs

The speakers, line-out signals and line-in signals are available over a 10-pin connector (J39):

Storage interface

MicroSD
A microSD socket connected to the SDMMC2 port of the STM32MP1 CPU is available on the Connect Core MP15 development board.

Communication

Gigabit Ethernet
10Base-T/100Base-Tx/1000Base-T Ethernet interface is fully integrated in the board through the Analog Devices ADIN1300 Ethernet PHY. The Ethernet interface is accessible through a RJ-45 connector with integrated link/activity LEDs.

UART/RS-232/RS-485
RS-232 and RS-485 standards are supported on the Connect Core MP15 Development Board, by sharing one CPU UART port (UART7). This means that only one of the two protocols can be use at a time. Selection between both is done through three three-position headers (J15, J16 and J17). RS-232 port is available in connector J38, where USART3 is also connected:

Note USART3 interface is shared with XBee socket and CAN.

RS-485 is on J19:

CAN
Two CAN FD buses are available on the development board through connectors J33 (CAN1) and J35 (CAN2). The pinout of these connectors is as follows, where x refers to the CAN interface on each connector:

You can connect 120Ω terminator resistors to each port by closing J32 (CAN1) and J34 (CAN2).

Note The CAN1 interface is shared with parallel camera and CAN2 interface is shared with XBee socket USART3.

USB Host
The ConnectCore MP15 Development Board offers support for four USB Host interfaces. Two of them are available over a stackable dual USB A-type connector. The third USB Host is connected to the PCI Express Mini card connector. The fourth is connected to the XBee socket as well as to a a 6-pin, 1.25 mm pitch expansion connector (J40). All USB Hosts can operate at full, high, and low speed. The following table shows the pinout of the USB expansion connector:

USB OTG
A micro-AB type receptacle for USB OTG connection is available on the Connect Core MP15 Development Board. This interface can operate in both Host and Device mode.
High-speed, full-speed, and low-speed connections are supported in Host mode. High-speed and full speed connections are supported in Device mode.

Mini PCI Express slot
The Connect Core MP15 Development Board provides a Mini PCI Express socket supporting USB and I2C connection to the CCMP15 module. A micro SIM socket is also connected to the Mini PCI Express slot.

XBee socket
One XBee socket is populated on the development board, supporting XBee Cellular modules. The UART bus connected to the XBee socket (USART3) is shared with CAN2.

Mikro Bus socket
The Connect Core MP1 Development Board provides a socket compatible with Mikro Electronica Micro Bus click boards, supporting I2C, UART, SPI, ADC and PWM connectivity.

SPI and I2C
A expansion connector provides access to one SPI interface (shared with the Mikro Bus socket) and the I2C2 bus:

GPIO
An additional expansion connector provides access to different IOs for general purpose usage:

User interfaces

Three LEDs are available on the development board, all of them are connected to CPU GPIOs. Two of them are shared with user buttons

Wireless

There is a u.FL connector (J4) which is routed directly to a SMA connector (J5). The purpose is to addapt the u.FL form factor to SMA form factor in order to extend the number of antennas that can be used on the development board for either the on-module antenna path or any other RF path that could be used on a PCIe or XBee board.

Specifications

Electrical specification

Supply voltages
The Connect Core MP15 Development Board has three supply inputs. Two of them power the whole system (Connect Core MP15 Development Board plus the Connect Core MP15 system-on-module) and the other one powers the RTC of the module when the main supply is not present. The following table shows the voltage range of the input supplies of the Connect Core MP15 Development Board:

Power consumption

The power consumption of the entire board (the ConnectCore MP15 Development Board plus the ConnectCore MP15 module) has been measured directly through the 5V input power supply. The following table lists power consumption figures measured in the ConnectCore MP15 Development Board under specific use cases.

Note To better understand the power consumption of the system, refer to the Connect Core MP1 System-on-Module Hardware Reference Manual to see the power consumption of the module (isolated) under the same use cases.

Use case descriptions
This section describes the use cases that were used to measure power consumption of the ConnectCore MP15 Development Board.

Suspend
System in suspend to RAM mode.

CAUTION! You can achieve minimum power consumption numbers by disabling both 3.3V power domains. However, in some applications it may not be possible to switch them off, depending on what they are powering.

Power-off
System in power-off with RTC enabled.

IDLE
System up and running. Ethernet and wireless disabled.

Decoding video
System up and running with the following configuration:

• Ethernet and wireless disabled.
• Fusion7 parallel display connected to the system.

Includes two different use cases:

• Display connected in IDLE mode (without decoding video).
• CPU decoding video.

CPU stress
System up and running with the following configuration:

• One Ethernet interface up and linked. The other one disabled.
• USB connected to the system.
• Hanoi application running (Hanoi application stresses the CPU and put it at 100% work load).

Mechanical specification

The ConnectCore MP15 Development Board dimensions are 120 x 160 mm. Four 3.2mm drills are located on the four corners of the PCB for assembling the board into an enclosure. These drills have a 5.5mm round metalized area for the screws and nuts. The board has four 2.6mm drills to assembly a half size or a full size PCI express mini card module, with 5.8mm x 5.8mm square metalized area for the screws and nuts.

Environmental specification

WLAN specification

For a complete WLAN specification, refer to the Connect Core MP1 System-on-Module Hardware
Reference Manual.

Connect Core MP15 Development Board

References

• Digi International Inc. Standard Terms & Conditions of Sale | Digi International
• Support Services | Digi International