Asus PRIME B250M-PLUS Motherboard Pin Definition.English - Page 6

3 Internal Connectors 1. Serial port connector (10-1 pin COM) This connector is for a serial (COM) port. Connect the serial port module cable to this connector, then install the module to a slot opening at the back of the system chassis. COM PIN 1 RXD DTR DSR CTS DCD TXD GND RTS RI 2. CPU and chassis fan connectors (4-pin CPU_FAN, 4-pin CHA_FAN) Connect the fan cable to the fan connector on the motherboard, ensuring that the black wire of the cable matches the ground pin CPU_FAN of the connector CHA_FAN CPU FAN PWM CPU FAN IN CPU FAN PWR GND +5V CHA FAN IN CHA FAN PWR GND Do not forget to connect the fan cables to the fan connectors. Insufficient air flow inside the system may damage the motherboard components. These are not jumpers! Do not place C jumper caps on the fan connectors! The CPU_FAN connector supports a CPU fan of maximum 1A (12 W) fan power. USB3+5V IntA_P1_SSRXIntA_P1_SSRX+ GND IntA_P1_SSTXIntA_P1_SSTX+ GND IntA_P1_DIntA_P1_D+ GND 3. USB 3.0 connector (20-1 pin) This connector allows you to connect a USB 3.0 module for additional USB 3.0 front or rear panel ports. With an installed USB 3.0 module, you can enjoy all the benefits of USB 3.0 including faster data transfer speeds of up to 5 Gbps, faster charging time for USB-chargeable devices, optimized power efficiency, and PIN 1 backward compatibility with USB 2.0. USB3 USB3+5V IntA_P2_SSRXIntA_P2_SSRX+ GND IntA_P2_SSTXIntA_P2_SSTX+ GND IntA_P2_DIntA_P2_D+ 4. USB 2.0 connector (10-1 pin) This connector is for USB 2.0 ports. Connect the USB module cable USB to this connector, then install the module to a slot opening at the back of the system chassis. This USB connector complies with USB 2.0 specifications and supports up to 480Mbps connection speed. PIN 1 USB+5V USB_P11USB_P11+ GND NC USB+5V USB_P12USB_P12+ GND 1-6 Motherboard Pin Definition