The I2C compatible TWI is used by the host device to control and monitor the nPM2100 Power Management Integrated Circuit (PMIC).
The TWI pins are directly accessible on pin header P11.
The following figure and table show the schematic and function descriptions for the TWI.
Figure 1. TWI schematic
| Pin | Pin name | Function |
|---|---|---|
| 1 | SDA | TWI data line |
| 2 | SCL | TWI clock signal |
| 3 | VOUT | Boost regulator output |
| 4 | GND | Ground |
Note: The PMIC TWI has the same voltage level as VOUT.