1. Does the I2C bus in the upsd3333 can speak with 64 addresses? 2. What is the capacitance of the I2C bus ? 3. Where is placed the UART1 RxD1 (p4.2 or p1.2 or both of them)? 4. What is the function of p1.3 Alternete 1(UART TxD1??? is already placed)? thanks, David