Voltage select #1
Description
SMBus operates at lower voltage (2.1V) compared to I2C (3.3V). Rotary switch to select voltage could be useful in this instance.
Furthermore, in combination with pinout select switches, could possibly be used to provide alternate modes for the bus. Specifically, depending on accuracy of GPIO that monitors the pin variant switches, the voltage select could provide a bunch of extra modes.
Example: If the power select had 3 states (1, 2, 3):
- Custom bus mode / program mode
- 2.1V
- 3.3V
With power select set to 1, the MCU could enter a programmable state allowing end-user to completely reconfigure the UX2 bus to their own needs. For example, a bus consisting primarily of GPIO with custom code running on the MCU to translate between it and master MCU.