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AM79C974 Datasheet(PDF) 89 Page - Advanced Micro Devices

Part # AM79C974
Description  PCnetTM-SCSI Combination Ethernet and SCSI Controller for PCI Systems
PDF  153 Pages
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Manufacturer  AMD [Advanced Micro Devices]
Direct Link  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79C974 Datasheet(HTML) 89 Page - Advanced Micro Devices

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P R E L I M I N A R Y
AMD
89
Am79C974
As shown in Figure 27, Pin 120 (
RST) is the first input to
the NAND tree. Pin 117 (
INTA) is the second input to the
NAND tree, followed by pin 118 (
INTB). All other PCI
bus signals follow, counterclockwise, with pin 58
(PWDN) being the last. Ethernet and SCSI specific pins
and all power supply pins are not part of the NAND tree.
Table 8 shows the complete list of pins connected to the
NAND tree.
Table 8. NAND Tree Configuration
NAND
NAND
NAND
Tree
Tree
Tree
Input #
Pin #
Name
Input #
Pin #
Name
Input #
Pin #
Name
1
120
RST
20
12
AD23
39
36
AD15
2
117
INTA
21
13
AD22
40
38
AD14
3
118
INTB
22
15
AD21
41
39
AD13
4
121
CLK
23
16
AD20
42
40
AD12
5
123
GNTB
24
18
AD19
43
41
AD11
6
124
GNTA
25
19
AD18
44
42
AD10
7
126
REQB
26
21
AD17
45
44
AD9
8
127
REQA
27
22
AD16
46
45
AD8
9
128
AD31
28
23
C/
BE247
47
C/
BE0
10
129
AD30
29
24
FRAME
48
48
AD7
11
131
AD29
30
25
IRDY
49
49
AD6
12
132
AD28
31
26
TRDY
50
51
AD5
13
2
AD27
32
27
DEVSEL
51
52
AD4
14
3
AD26
33
28
STOP
52
53
AD3
15
5
AD25
34
29
LOCK
53
54
AD2
16
6
AD24
35
31
PERR
54
56
AD1
17
7
C/
BE336
32
SERR
55
57
AD0
18
9
IDSELA
37
34
PAR
56
58
PWDN
19
10
IDSELB
38
35
C/
BE1



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