The default I2C address is 0x08.

Power Pins

• V+ - This is the voltage output (Vout) pin. This pin will output the voltage selected from the HUSB238. It is also available from the + pin from the terminal block.
• GND - Common ground for power and logic. It is also available from the - pin from the terminal block.

I2C

Since the Vout can be as high as 20V, we don't have an onboard voltage regulator or pull-up resistors on the I2C lines. Connect these pins to a microcontroller or microcomputer board that has a separate power supply (or that can regulate from up-to-20V if you plan on selecting that high) and I2C pull-up resistors to your desired logic level. When configuring over I2C, the jumper settings are used on startup until the I2C commands come over.

• SCL - I2C clock pin, connect to your microcontroller's I2C clock line.
• SDA - I2C data pin, connect to your microcontroller's I2C data line.

USB Type C Port and Data Pins

At the top of the board is the USB type C port. You'll use this port to plug into a USB C PD wall adapter with a USB C cable. The USB data pins are broken out on the board: Data Plus (labeled D+ on the board silk) and Data Minus (labeled D- on the board silk).

Jumpers

A series of jumpers are used to determine the voltage and current requested from the PD adapter. By default, the 5V and 1A jumpers are closed. You can cut these jumpers to change voltages and/or amps.

Amp Jumpers

• 1A - The one amp jumper. Closed by default. Cut the jumper to change amperage.
• 2A - The two amps jumper. Open by default. Solder it closed to select.

To select 3A, leave both the 1A and 2A jumpers open.

Voltage Jumpers

• 5V - The 5V jumper. Closed by default. Cut the jumper to change voltages.
• 9V - The 9V jumper. Open by default. Solder it closed to select.
• 12V - The 12V jumper. Open by default. Solder it closed to select.
• 15V - The 15V jumper. Open by default. Solder it closed to select.
• 18V - The 18V jumper. Open by default. Solder it closed to select.

To select 20V, or the highest available voltage from your adapter, leave all of the voltage jumpers open.