i2C-6ULX-B位置 i2S-6UB Pinout 备注
J3.8 UART3_TX
J3.10 UART3_RX
J3.20 UART1_CTS RS485 RE/DE
J3.16 UART4_TX
J3.18 UART4_RX
J3.28 JTAG_MOD RS485 RE/DE