Original GroundStudio Product

The products created by GroundStudio are made using high-quality components, designed and assembled in Romania.

Downloads:

Pinout

Schematic and Layout

PRODUCT DESCRIPTION:

The GroundStudio Jade U1 development board is an improved version of the classic U1 board, equipped with a USB Type-C adapter (upgraded from USB Type-B). It uses the HT42B534-2 chip for USB 2.0 to Serial (UART) conversion, an I2C_3V3 adapter for quick connection via I2C to compatible devices without needing a 5V to 3V3 logic level converter, and an ON-OFF switch to disconnect power without unplugging the USB or power cable.

Thanks to the HT42B534-2 chip, the development board can also emulate other devices (e.g., a keyboard) using the program and documentation available at the following link: https://www.holtek.com/productdetail/-/vg/HT42B534-2

The Jade U1 development board is compatible with sensors and other modules that operate at 5V. It can also be used with modules that operate at 3V3 only through the I²C 3V3 adapter.

For serial communication (UART) with devices at 3.3V logic level, a separate logic level converter module is required.

The position of the RESET button has been improved, being placed on the side, making it accessible even when used with a shield.

The board also integrates a I²C 3V3 connector compatible with STEMMA QT or Qwiic connectors for easier interconnectivity with a wide range of sensors and modules.

General Pin Functions:

• LED: There is a built-in LED controlled by digital pin 13. When the pin is high, the LED is on; when the pin is low, the LED is off.
• VIN: The input voltage to the board when using an external power source (as opposed to 5 volts from the USB connection or another regulated power source). You can supply voltage through this pin, or if you supply voltage via the power jack, access it through this pin.
• 5V: This pin outputs a regulated 5V from the onboard regulator. The board can be powered either from the DC power jack (7 - 20V), the USB connector (5V), or the VIN pin of the board (7-20V). Supplying voltage via the 5V or 3.3V pins bypasses the regulator and can damage the board.
• 3V3: A 3.3-volt supply generated by the onboard regulator. The maximum current draw is 500 mA.
• GND: Ground pins.
• IOREF: This pin on the board provides the voltage reference with which the microcontroller operates. A properly configured shield can read the IOREF pin voltage and select the appropriate power source or enable voltage translators on the outputs to work with 5V or 3.3V.
• Reset: Typically used to add a reset button to shields, blocking the one on the board.

The board also features pins for specialized functions:

• Serial / UART: Pins 0 (RX) and 1 (TX). Used for receiving (RX) and transmitting (TX) TTL serial data. These pins are connected to the corresponding pins of the ATmega8U2 chip.
• External interrupts: Pins 2 and 3. These pins can be configured to trigger an interrupt on a low value, a rising or falling edge, or a change in value.
• PWM (pulse-width modulation): Pins 3, 5, 6, 9, 10, and 11. Provide 8-bit PWM output with the analogWrite() function.
• SPI (Serial Peripheral Interface): Pins 10 (SS), 11 (MOSI), 12 (MISO), and 13 (SCK). Support SPI communication using the SPI library.
• TWI (two-wire interface) / I2C: Pins SDA (A4) and SCL (A5). Support TWI communication using the Wire library. Pins A4 and A5 are directly connected to the I²C 3V3 logic converter, being implicitly pullup, which may cause incompatibility with certain shields.
• AREF (analog reference): Reference voltage for analog inputs.

Technical Specifications:

Microcontroller: ATmega328p with UNO bootloader
USB-Serial Converter: HT42B534-2
Voltage regulator: AMS1117-5V and AMS1117-3.3V
Power supply voltage [Vin]: 7V - 12V
Digital I/O pins: 16 (6 PWM output pins (~3, ~5, ~6, ~9, ~10, ~11))
Analog input pins: 4
USB 2.0 Type-C adapter
I2C_3V3 adapter (SH type with 1mm pitch)
Max DC current per I/O pin: 20 mA
Max current 5V/3V3: 500mA
FLASH memory: 32 kB
EEPROM memory: 1 kB
SRAM memory: 2 kB
Frequency: 16MHz
Approx. PCB dimensions: 68.6mm x 53.4mm

* Compatible with R3 shields (Pins A4 and A5 are directly connected to the I²C 3V3 logic converter, being implicitly pullup, which may cause incompatibility with certain shields.)

* No additional driver installation required on any up-to-date operating system (unlike other modules on the market (CH340, FTDI, etc.)).

* For Windows 7, 8, or 8.1, find the driver in the Downloads section.

* Pins A4 and A5 are directly connected to the I²C 3V3 logic converter, being implicitly pullup, which may cause incompatibility with certain shields.

Example Connection with Arduino IDE:

For this example, you need the following:

1x Jade U1 development board || Reference RZUJBN_AAA

Step 1 - Download Arduino IDE

Arduino IDE

Before connecting the board, start by downloading Arduino IDE 1.8.x from the link above according to your preferences and the operating system used.

Step 2 - Connect Jade U1 to your computer

After the initial connection via a USB-C cable, your computer will attempt to find a compatible driver. In this case, it will connect directly to Windows using the HT42B534-2 chip, as the drivers for this will install automatically.

Step 3 - Configure Arduino IDE settings

To select the board, go to the "Tools" menu, then click on the board button, ensuring that Arduino Uno is selected.

Next, you need to tell the Arduino IDE which of your computer's serial ports is connected to the Jade U1. To do this, go back to "Tools", then hover over Serial Port and select the COM port of the Jade U1.

If you have multiple ports and are unsure which port is the Jade U1, disconnect it for a moment and check the menu to see which one disappears.

After selecting the COM port and the board, you can upload the Blink code from the menu File -> Examples -> 01.Basics -> Blink.

Package Contents:

1x GroundStudio Jade U1 development board