... (optional)USB expansionSerial PortsUART with HW flow control1 x DB9 Jack, standard RS232, or1 x 6-pin Header TTL signal level, can ... -in module, such as IR detection.Debug & MaintenanceDebug Port3-wire RS232 Debug PortEthernet10/100Mbps connection, KITL supportedBoot ModeBooting from the following ...