Com1/Com2 Rs232 Power Select - DFI SD331-C236 User Manual

COM1/COM2 RS232 Power Select

JP9
COM 1
JP14
JP9 (for COM 1) and JP14 (for COM 2) are used to configure Serial COM ports to pure RS232
or RS232 with power. The pin functions of COM 1 and COM 2 will vary according to JP9's and
JP14's setting respectively.
JP9 (COM 1)
2 4 6
1 3 5
1-3 (RI-), 2-4 (DCD-) On:
RS232 (default)
JP14 (COM 2)
6 5
4 3
2 1
1-3 (RI-), 2-4 (DCD-) On:
RS232 (default)
COM 2
1
9
2
2 4 6
1 3 5
3-5 (+5V), 4-6 (+12V) On:
RS232 with power
6 5
3
4
2
1
3-5 (+5V), 4-6 (+12V) On:
RS232 with power
17
USB Power Select
JP17
1
2 JP15
3
1-2 On:
5VDU (default)
JP16
1
2
3
JP19
2-3 On: 5V
The power of the USB connectors' voltage buses can be configured to either 5VDU or 5V. The
jumpers are located as illustrated above and correspond to each USB port number as listed
below.
Rev. B
JP15
JP16
JP17
JP18
JP19
JP20
JP20 JP18
USB Port
USB 1/2 (USB 3.0)
USB 3/4 (USB 3.0)
USB 5/6 (USB 2.0)
USB 7/8/9/10 (USB 2.0)
USB 5/6 (USB 3.0)
USB 7/8 (USB 3.0)