am79c974 Advanced Micro Devices, am79c974 Datasheet - Page 89

• Manufacturer Part Number: am79c974
• Description: Pcnettm-scsi Combination Ethernet And Scsi Controller For Pci Systems
• Manufacturer: Advanced Micro Devices

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
Input #
NAND
Tree
10
11
12
13
14
15
16
17
18
19
1
2
3
4
5
6
7
8
9
Pin #
120
117
118
121
123
124
126
127
128
129
131
132
10
2
3
5
6
7
9
IDSELA
IDSELB
REQB
REQA
C/BE3
Name
GNTB
GNTA
AD31
AD30
AD29
AD28
AD27
AD26
AD25
AD24
INTA
INTB
RST
CLK
Table 8. NAND Tree Configuration
Input #
NAND
Tree
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
P R E L I M I N A R Y
Am79C974
Pin #
12
13
23
24
25
26
15
16
18
19
21
22
27
28
29
31
32
34
35
(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.
DEVSEL
FRAME
C/BE2
C/BE1
TRDY
STOP
LOCK
PERR
SERR
Name
AD23
AD22
AD21
AD20
AD19
AD18
AD17
AD16
IRDY
PAR
Input #
NAND
Tree
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Pin #
36
38
39
40
41
42
44
45
47
48
49
51
52
53
54
56
57
58
PWDN
C/BE0
Name
AMD
AD15
AD14
AD13
AD12
AD11
AD10
AD9
AD8
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
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