PCI BUS MULTI 8255/8254 ADAPTER CATALOG & DIMENTION

INTRODUCTION
The PCI bus multi-8255/8254 adapter is a 32 bits PCI bus adapter with Plug and Play (PnP) features, it is a programmable I/O interface for PC/486, Pentium or compatible computers. The PnP features let hardware configuration for IRQ and I/O address is detected by BIOS automatically, you don’t need set switch and jumper.

The PCI bus multi-8255/8254 adapter provides total 24 digital I/O ports, each I/O port contains 8 I/O lines, and can be set either input or output by the user’s program. Two 8254 on board chips provides six programmable interval timer/counter.

The features of the PCI bus multi-8255/8254 adapter are:
1.
 32 bits PCI bus with Plug and Play (PnP) features.
2.
 Programmable I/O control functions.
3.
 Up to 192 I/O lines.
4.
 Up to 6 counter/timer.
5.
 Maximum of 10 MHZ counter rate.
6.
 Support several operating modes that are programmable.
7.
 Provides DII device driver for PnP features.

Pin Assignments
The signals assignment are shown in the following, where A is the signals assignment of DB50 connector on the flat cable, and the signals assignment of on board connector, and DB is the signals assignment of university connector of  Sub-D50.
When you like to connect Sub-D50 connector to DB50 connector, please use DB. The pin to pin assigned is shown as DB vs. A.

Sample:

DB
 A
 Function
DB
 A
 Function
1
 1
 P3A0
34
 2
 P3A1
18
 3
 P3A2
2
 4
 P3A3

For the DB37 connector, the pin assignments of 40 pin flat cable is mark as A.
The pin assignments are shown in the next pages.
   1. Connector Pin Assignments (JP1)   U1/U2

DB
 A
 Function
DB
 A
 Function
1
 1
 P1A0
34
 2
 P1A1
18
 3
 P1A2
2
 4
 P1A3
35
 5
 P1A4
19
 6
 P1A5
3
 7
 P1A6
36
 8
 P1A7
20
 9
 P1B0
4
 10
 P1B1
37
 11
 P1B2
21
 12
 P1B3
5
 13
 P1B4
38
 14
 P1B5
22
 15
 P1B6
6
 16
 P1B7
39
 17
 P1C0
23
 18
 P1C1
7
 19
 P1C2
40
 20
 P1C3
24
 21
 P1C4
8
 22
 P1C5
41
 23
 P1C6
25
 24
 P1C7
9
 25
 GND
42
 26
 GND
26
 27
 P2A0
10
 28
 P2A1
43
 29
 P2A2
27
 30
 P2A3
11
 31
 P2A4
44
 32
 P2A5
28
 33
 P2A6
12
 34
 P2A7
45
 35
 P2B0
29
 36
 P2B1
13
 37
 P2B2
46
 38
 P2B3
30
 39
 P2B4
14
 40
 P2B5
47
 41
 P2B6
31
 42
 P2B7
15
 43
 P2C0
48
 44
 P2C1
32
 45
 P2C2
16
 46
 P2C3
49
 47
 P2C4
33
 48
 P2C5
17
 49
 P2C8
50
 50
 P2C7

   2. Connector Pin Assignments (JP2)  U3/U4

DB
 A
 Function
DB
 A
 Function
1
 1
 P3A0
34
 2
 P3A1
18
 3
 P3A2
2
 4
 P3A3
35
 5
 P3A4
19
 6
 P3A5
3
 7
 P3A6
36
 8
 P3A7
20
 9
 P3B0
4
 10
 P3B1
37
 11
 P3B2
21
 12
 P3B3
5
 13
 P3B4
38
 14
 P3B5
22
 15
 P3B6
6
 16
 P3B7
39
 17
 P3C0
23
 18
 P3C1
7
 19
 P3C2
40
 20
 P3C3
24
 21
 P3C4
8
 22
 P3C5
41
 23
 P3C6
25
 24
 P3C7
9
 25
 GND
42
 26
 GND
26
 27
 P4A0
10
 28
 P4A
43
 29
 P4A2
27
 30
 P4A
11
 31
 P4A4
44
 32
 P4A
28
 33
 P4A6
12
 34
 P4A
45
 35
 P4B0
29
 36
 P4B
13
 37
 P4B2
46
 38
 P4B
30
 39
 P4B4
14
 40
 P4B
47
 41
 P4B6
31
 42
 P4B
15
 43
 P4C0
48
 44
 P4C
32
 45
 P4C2
16
 46
 P4C
49
 47
 P4C4
33
 48
 P4C
17
 49
 P4C6
50
 50
 P4C

Connector Pin Assignments (JP3)   U5/U6

DB
 A
 Function
DB
 A
 Function
1
 1
 P5A0
34
 2
 P5A1
18
 3
 P5A2
2
 4
 P5A3
35
 5
 P5A4
19
 6
 P5A5
3
 7
 P5A6
36
 8
 P5A7
20
 9
 P5B0
4
 10
 P5B1
37
 11
 P5B2
21
 12
 P5B3
5
 13
 P5B4
38
 14
 P5B5
22
 15
 P5B6
6
 16
 P5B7
39
 17
 P5C0
23
 18
 P5C1
7
 19
 P5C2
40
 20
 P5C3
24
 21
 P5C4
8
 22
 P5C5
41
 23
 P5C6
25
 24
 P5C7
9
 25
 GND
42
 26
 GND
26
 27
 P6A0
10
 28
 P6A1
43
 29
 P6A2
27
 30
 P6A3
11
 31
 P6A4
44
 32
 P6A5
28
 33
 P6A6
12
 34
 P6A7
45
 35
 P6B0
29
 36
 P6B1
13
 37
 P6B2
46
 38
 P6B3
30
 39
 P6B4
14
 40
 P6B5
47
 41
 P6B6
31
 42
 P6B7
15
 43
 P6C0
48
 44
 P6C1
32
 45
 P6C2
16
 46
 P6C3
49
 47
 P6C4
33
 48
 P6C5
17
 49
 P6C6
50
 50
 P6C7

   3. Connector Pin Assignments (JP4)  U7/U8

DB
 A
 Function
DB
 A
 Function
1
 1
 P7A0
34
 2
 P7A1
18
 3
 P7A2
2
 4
 P7A3
35
 5
 P7A4
19
 6
 P7A5
3
 7
 P7A6
36
 8
 P7A7
20
 9
 P7B0
4
 10
 P7B1
37
 11
 P7B2
21
 12
 P7B3
5
 13
 P7B4
38
 14
 P7B5
22
 15
 P7B6
6
 16
 P7B7
39
 17
 P7C0
23
 18
 P7C1
7
 19
 P7C2
40
 20
 P7C3
24
 21
 P7C4
8
 22
 P7C5
41
 23
 P7C6
25
 24
 P7C7
9
 25
 GND
42
 26
 GND
26
 27
 P8A0
10
 28
 P8A1
43
 29
 P8A2
27
 30
 P8A3
11
 31
 P8A4
44
 32
 P8A5
28
 33
 P8A6
12
 34
 P8A7
45
 35
 P8B0
29
 36
 P8B1
13
 37
 P8B2
46
 38
 P8B3
30
 39
 P8B4
14
 40
 P8B5
47
 41
 P8B6
31
 42
 P8B7
15
 43
 P8C0
48
 44
 P8C1
32
 45
 P8C2
16
 46
 P8C3
49
 47
 P8C4
33
 48
 P8C5
17
 49
 P8C6
50
 50
 P8C7

   1. DB40 Connector Pin Assignments (CN5)

DB
 A
 Function
DB
 A
 Function
1
 1
 GND
21
 4
 GND
2
 3
 OUT0
22
 6
 OUT5
3
 5
 GATE0
23
 8
 GATE5
4
 7
 CLK0
24
 10
 CLK5
5
 9
 GND
25
 12
 GND
6
 11
 OUT1
26
 14
 +5V
7
 13
 GATE1
27
 16
 GND
8
 15
 CLK1
28
 18
 -12V
9
 17
 GND
29
 20
 GND
10
 19
 OUT2
30
 22
 +12V
11
 21
 GATE2
31
 24
 GND
12
 23
 CLK2
32
 26
 -12V
13
 25
 GND
33
 28
 5MHZ
14
 27
 OUT3
34
 30
 1MHZ
15
 29
 GATE3
35
 32
 500MHZ
16
 31
 CLK3
36
 34
 100MHZ
17
 33
 GND
37
 36
 GND
18
 35
 OUT4



19
 37
 GATE4



20
 2
 CLK4