An I2C bus requires pull-up resistors to function. Should no other device on the I2C bus have them, the PIC16F15244 Curiosity Nano provides footprints for two 0402 SMD resistors (not mounted) so that the pull-ups can be soldered on. These resistors will pull the I2C lines to VCC_TARGET.
Figure 1. PIC16F15244 Curiosity Nano I2C resistor
footprints
Note: The PIC16F15244 also has internal pull-ups
that can be enabled as an alternative to soldering.
| PIC16F15244 Pin | Description | Shared Functionality |
|---|---|---|
| RB4 | I2C SDA | Edge connector |
| RB6 | I2C SCL | Edge connector |