Original GroundStudio Product

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 and includes a 3V3 I2C adapter for quick I2C connections to compatible devices without requiring a separate 5V to 3.3V level converter.

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

For UART communication with devices using 3.3V logic levels, a separate logic level converter module is required.

The RESET button's position has been improved, placed on the side so it can be used even when combined with a shield.

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

General Pin Functions:

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

Additionally, the board includes pins for specialized functions such as:

• Serial / UART: Pin 0 (RX) and pin 1 (TX) for TTL serial data reception (RX) and transmission (TX). 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 voltage change.
• PWM (pulse-width modulation): Pins 3, 5, 6, 9, 10, and 11. Provide 8-bit PWM output using the analog "analogWrite()" function.
• SPI (Serial Peripheral Interface): Pins 10 (SS), 11 (MOSI), 12 (MISO), and 13 (SCK). These pins support SPI communication using the SPI library.
• TWI (two-wire interface) / I2C: SDA (A4) and SCL (A5) pins. Support TWI communication using the Wire library. Pins A4 and A5 are directly connected to the 3V3 I2C logic converter with pullups enabled, which may cause incompatibility with some shields.
• AREF (analog reference): The 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
Supply Voltage [Vin]: 7V - 12V
Digital I/O Pins: 16 (6 of which are PWM output (~3, ~5, ~6, ~9, ~10, ~11))
Analog Input Pins: 4
USB Adapter: USB 2.0 Type-C
I2C_3V3 Adapter (SH type with 1mm pitch)
Maximum DC Current per I/O Pin: 20mA
Maximum 5V/3V3 Current: 500mA
FLASH Memory: 32kB
EEPROM: 1kB
SRAM: 2kB
Frequency: 16MHz
Approx. PCB Dimensions: 68.6mm x 53.4mm

* Compatible with R3 shields (Pins A4 and A5 are directly connected to the 3V3 I2C logic converter with pullups enabled, which may cause incompatibility with some shields.)

* No additional driver installation required on any updated operating system (unlike other modules on the market like CH340, FTDI, etc.).

* For Windows 7, 8, or 8.1, drivers can be found in the Downloads section.

* Pins A4 and A5 are directly connected to the 3V3 I2C logic converter with pullups enabled, which may cause incompatibility with some shields.

Example of Connecting Arduino IDE:

To complete this example, you will need the following:

1x Jade U1 Development Board || Reference RZUJBN_AAA

Step 1 - Download Arduino IDE

Arduino IDE

Before connecting the board, download Arduino IDE 1.8.x from the link above, based on your preferences and operating system.

Step 2 - Connect Jade U1 to the computer

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

Step 3 - Configuring Arduino IDE.

To select the board, go to the "Tools" menu, then click the board button and ensure Arduino Uno is selected.

Next, tell the Arduino IDE which serial port on your computer the Jade U1 is connected to. To do this, go back to "Tools," hover over Serial Port, and select the COM port for Jade U1.

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

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

Package Contents:

1x GroundStudio Jade U1 Development Board