- VIN - This is the power pin. To power the board, give it the same power as the logic level of your microcontroller - e.g. for a 3V microcontroller like a Feather M4, use 3V, or for a 5V microcontroller like Arduino, use 5V.
- 3Vo - This is the 3.3V output from the voltage regulator. You can grab up to 100mA from this if you like.
- GND - This is common ground for power and logic.
The default I2C address for the TSC2007 is 0x48.
- SCL - I2C clock pin, connect to your microcontroller I2C clock line. There's a 10K pullup on this pin.
- SDA - I2C data pin, connect to your microcontroller I2C data line. There's a 10K pullup on this pin.
- STEMMA QT - These connectors allow you to connect to development boards with STEMMA QT / Qwiic connectors or to other things with various associated accessories.
- FPC Connector - FPC socket for a 1mm-pitch 4-wire resistive touchscreen located at the top of the board. This reads the X/Y contacts directly from a 4-wire FPC cable.
- Y-, X-, Y+, X+ - These are the X/Y contacts available on 0.1" pitch breakouts. If you have another kind of touch screen that does not have a 1mm pitch FPC cable then you can solder directly to these points.
- INT - This is the interrupt output pin. It will drop low when a touch is detected. You can use this to reduce the I2C polling.
- Interrupt LED - On the front of the board in the lower right corner, above the INT pin, is the interrupt LED. It is the red LED and turns on when a connected panel is touched.
- Interrupt LED jumper - In the lower right corner on the back of the board is a jumper for the interrupt LED. If you wish to disable the interrupt LED, simply cut the trace on this jumper.
On the back of the board are two address jumpers, labeled A0 and A1, below the I2C Addr label on the board silk. These jumpers allow you to chain up to 4 of these boards on the same pair of I2C clock and data pins. To do so, you solder the jumpers "closed" by connecting the two pads.
The default I2C address is 0x48. The other address options can be calculated by “adding” the A0/A1 to the base of 0x48.
A0 sets the lowest bit with a value of 1, A1 sets the next bit with a value of 2. The final address is 0x48 + A1 + A0 which would be 0x4B.
If only A0 is soldered closed, the address is 0x48 + 1 = 0x49
If only A1 is soldered closed, the address is 0x48 + 2 = 0x4A
The table below shows all possible addresses, and whether the pin(s) should be high (closed) or low (open).
- Power LED - In the upper left corner, above the STEMMA connector, on the front of the board, is the power LED, labeled on. It is the green LED.
- LED jumper - In the upper right corner on the back of the board is a jumper for the power LED. If you wish to disable the power LED, simply cut the trace on this jumper.