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User Manual
2.8.5. I2C Interface
Adding pull-high resistors to 1.8 V through the 2.2 kΩ resistors is recommended.
Figure 9. I2C connection (example)
2.8.6. UART Interface
There are two UART interfaces: One is a 4 bit UART for high-speed data transfer, and the other is a 2 bit
UART for diagnostic tools and debugging.
Figure 10. UART connection (example)