JHCTech ALAD-K1220T, User Manual, Page: 24 / 71

User’s Manual
17
Figure 2.18 USB3.0 Connector
Table 2.5: USB3.0 Port Pin Assignments
Pin Signal Name
1 VBUS
2 D-
3 D+
4 GND
5 StdA_SSRX-
6 St
7 GND_DRAIN
8 StdA_SSTX-
9 St
Shell Shield
2.4.5 COM1/2 Connector
COM 1 and COM 2 are D-sub 9-pin connectors , they can be configure as RS232/RS422 and RS485 by
BIOS setting. The serial ports are asynchronous communication ports with 16C550A-compatible UARTs
that can be used with modems, serial printers, remote display terminals, and other serial devices.
1 2 3 4 5
6 7 8 9
Figure 2.19 COM1/2 Connector
Table 2.6: COM1/2 Serial Port Pin Assignments
Pin/Type RS232 Signal RS422 Signal RS485 Signal
1 DCD TX- DATA-
2 RXD TX+ DATA+
3 TXD RX+ NC
4 DTR RX- NC
5 GND GND GND
6 DSR NC NC
7 RTS NC NC
8 CTS NC NC
9 IR NC NC