MO_62A Hardware Interface Description

MO_62A Hardware Interface Description

1. System Block Diagram

2. Processor Block Diagram

3. Power Supply

USB-C Power Port

4. Boot Mode

5. Memory

5.1 LPDDR4

5.2 Micro SD Card

5.3 EEPROM

6. On-Board Interface Introduction

6.1 Gigabit Ethernet

6.2 USB Type-A

6.3 Micro HDMI

6.4 Fan Interface

6.5 Headphone Jack

6.6 CSI Interface

6.7 WIFI

6.8 RTC 

7. Expansion Interface Description

40-Pin GPIO Header

8. Indicators and Debug Port

If you want to learn about the design principles and detailed specifications of the MO_62A, this chapter is perfect for you. We will try to provide a concise and brief overview for you.

1. System Block Diagram

2. Processor Block Diagram

3. Power Supply

USB-C Power Port

The single-board computer is powered via the USB-C interface and uses a 5.1kΩ resistor to identify itself as a USB Power Sink (UFP), allowing 5V output. It defaults to 500 mA (in accordance with the "Power Sink Device" rules in USB-C) but requires 5V @ 3A for stable operation.

Users must ensure that the adapter used supports 3A output. Failure to provide 3A, especially in cases of insufficient current, may lead to instability or port damage.

4. Boot Mode

The default boot mode is the SD card interface. If no SD card is inserted, the BootROM on the SoC will attempt to boot from Ethernet.

5. Memory

5.1 LPDDR4

The board is equipped with 4GB, x32 LPDDR4 memory. 2GB and 8GB options are available.

5.2 Micro SD Card

The MicroSD card is the primary boot interface of the single-board computer, corresponding to the MMC1 interface of the AM62A74.

5.3 EEPROM

The single-board computer is equipped with an on-board BL24C02 2Kbit I2C EEPROM, which is used to store data such as circuit board information and production date.

6. On-Board Interface Introduction

6.1 Gigabit Ethernet

The board is equipped with 1 Gigabit Ethernet port (supporting PoE power supply, requires a PoE expansion board for use), which can be used for wired network connection and supports adaptive rates of 10/100/1000 Mbps.

6.2 USB Type-A

The board is equipped with 4* USB 2.0 Type-A ports .

USB 2.0 Type-A: Used to connect USB devices such as mice, keyboards, and USB flash drives.

6.3 Micro HDMI

The board is equipped with 1 Micro HDMI port for connecting a display, with a maximum output of 1080p.

It adopts Lattice Semiconductor's SiI9022A HDMI transmitter, which can convert 24-bit parallel RGB DSS output streams and McASP0 signals into digital audio and video signals compliant with HDMI standards. The data mapping format used is RGB888, and the data bus width is 24 bits.

6.4 Fan Interface

The board is equipped with a 4-Pin 1.0mm fan interface that supports PWM control. It can be used to connect an active heatsink, and the motherboard is cooled by a fan to maintain optimal performance.

6.5 Headphone Jack

The board is equipped with a 4-segment 3.5mm headphone jack that supports microphone input and can be used to connect wired headphones.

6.6 CSI Interface

With a size specification compatible with Raspberry Pi, the AM62A74 supports 1 CSI interface, compliant with MIPI CSI-2 v1.3+ and MIPI D-PHY 1.2 standards. It has 4 data lanes with a maximum transmission rate of 2.5Gbps per lane, and the interface also supports up to 16 virtual channels.

6.7 WIFI

The MO_62A board is equipped with one FG6221ASRC (Eaglestar) wireless module. This wireless module complies with IEEE 802.11 a/b/g/n/ac and BLE 4.2 standards. The integrated module provides an SDIO interface for Wi-Fi functionality and a UART interface for Bluetooth functionality.

6.8 RTC 

The MO_62A board is equipped with an RTC connected via the I2C interface. This device can be powered by an external button battery, enabling precise time keeping even when the board is powered off.

7. Expansion Interface Description

40-Pin GPIO Header

The board is equipped with a 40-Pin GPIO (General Purpose Input/Output) header, providing highly flexible interface support for hardware expansion.

8. Indicators and Debug Port

The board is equipped with a bi-color (red/green) LED for power and status indication.

By default, relevant debug logs are printed and console login is available via a JST-3 interface.