Connect Tech - COM Express Type-6 PMC/XMC Carrier Board - User Manual
Revision 0.03
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8 x Asynchronous Serial Ports
The
COM Express Type-6 PMC/XMC Carrier
features 8 “external” serials ports. Each serial port’s line
interface can be configured to be a RS-232 or RS-422/485. These serial ports are generated from on-board
PCIe 8-port UART the Exar 17V358 (Connect Tech’s BlueStorm/Express Circuitry).
Software Support for the Exar 17V358
Additional drivers will be needed to properly operate the 4 additional serial ports on the COM Express
carrier. Drivers for this functionality can be found on Connect Tech’s download zone here:
http://www.connecttech.com/asp/Support/DownloadZone_results.asp?Product=3&OperatingSystem=IS+N
OT+NULL&x=16&y=13
Serial Connectors RS-232/RS-485 Pinout
Port No.
Pin No.
RS-232
Direction
RS-422/485
Direction
1 or 5
1
DCD
Input
RxD+
Input
2
DSR
Input
CTS-
Input
3
RxD
Input
RxD-
Input
4
RTS
Output
RTS+
Output
5
TxD
Output
TxD+
Output
6
CTS
Input
CTS+
Input
7
DTR
Output
TxD-
Output
8
RI
Input
RTS-
Output
9
SG
Signal Ground
SR
Signal Reference
10
N/C
No Connection
N/C
No Connection
2 or 6
11
DCD
Input
RxD+
Input
12
DSR
Input
CTS-
Input
13
RxD
Input
RxD-
Input
14
RTS
Output
RTS+
Output
15
TxD
Output
TxD+
Output
16
CTS
Input
CTS+
Input
17
DTR
Output
TxD-
Output
18
RI
Input
RTS-
Output
19
SG
Signal Ground
SR
Signal Reference
20
N/C
No Connection
N/C
No Connection
3 or 7
21
DCD
Input
RxD+
Input
22
DSR
Input
CTS-
Input
23
RxD
Input
RxD-
Input
24
RTS
Output
RTS+
Output
25
TxD
Output
TxD+
Output
26
CTS
Input
CTS+
Input
27
DTR
Output
TxD-
Output
28
RI
Input
RTS-
Output
29
SG
Signal Ground
SR
Signal Reference
30
N/C
No Connection
N/C
No Connection
4 or 8
31
DCD
Input
RxD+
Input
32
DSR
Input
CTS-
Input
33
RxD
Input
RxD-
Input
34
RTS
Output
RTS+
Output
35
TxD
Output
TxD+
Output
36
CTS
Input
CTS+
Input
37
DTR
Output
TxD-
Output
38
RI
Input
RTS-
Output
39
SG
Signal Ground
SR
Signal Reference
40
N/C
No Connection
N/C
No Connection
