expanded dmg button pcb (i2c version)

this is a button breakout board which utilizes I2C protocol via a MCP23017 IC.

features:

• d-pad, start, select, A, B, X, and Y buttons available (breakout header for L1, L2, R1, and R2)
• gold-immersion PCB treatment
• fully compatible with our silicone buttons (including 2x A/B parts)
• side solder points for connection of 2x Left and 2x Right buttons, with GND connections
• fits into standard DMG shell
• 1.0mm thickness
• matte black finish
• uses well-documented MCP23017 IC
• two solder jumpers (use 0ohm 0603 resistor) for changing IC address to 0x20 or 0x21 -- ships as 0x20

here is code for arduino to test or for reference. button presses appear in the serial monitor stream.

here is a drill template for adding holes for the X and Y buttons to your console shell. pinout:

• GPA2 — B
• GPA3 — A
• GPA4 — R2
• GPA5 — R1
• GPA6 — X
• GPA7 — Y
• GPB0 — UP
• GPB1 — L1
• GPB2 — L2
• GPB3 — LEFT
• GPB4 — RIGHT
• GPB5 — DOWN
• GPB6 — SELECT
• GPB7 — START