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Technical Description
Technical Description
The COMM+8.LPCI provides eight RS-232 ports from a single PCI slot. The board meets the requirements for the
MD1 "Low Profile" specification as defined by PCISIG in PCI 2.2 "Low Profile Addendum." The
COMM+8.LPCI also features Universal Bus (3.3 and 5.0V) operation.
The COMM+8.LPCI utilizes the 16C864 UART. This chip features programmable baud rates, data format,
interrupt control and industry leading 128-byte transmit and receive FIFOs.
Connector Pin Assignments
DB-25 (RS-232 DTE)
Signal
GND
TD
RTS
DTR
RD
CTS
DSR
DCD
RI
(DB-25 Male)
Name
Ground
Transmit Data
Request To Send
Data Terminal Ready
Receive Data
Clear To Send
Data Set Ready
Data Carrier Detect
Ring Indicator
Pin #
7
2
4
20
3
5
6
8
22
Mode
Output
Output
Output
Input
Input
Input
Input
Input
Technical Note: Please terminate any control signals that are not going to be used. The most common way to do this
is connect RTS to CTS and RI. Also, connect DCD to DTR and DSR. Terminating these pins, if not used, will help
insure you get the best performance from your adapter.
DB-68 (Micro MDB-68 Female)
Port #
TD
RI
DCD
DTR
RTS
DSR
RD
CTS
GND
Sealevel Systems COMM+8.LPCI
1
1
2
3
4
5
6
7
8
17
2
9
10
11
12
13
14
15
16
17
3
19
20
21
22
23
24
25
26
18
4
27
28
29
30
31
32
33
34
18
5
35
36
37
38
39
40
41
42
51
6
43
44
45
46
47
48
49
50
51
7
53
54
55
56
57
58
59
60
52
8
61
62
63
64
65
66
67
68
52
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