LSI53C875 LSI Logic, LSI53C875 Datasheet - Page 96

• Manufacturer Part Number: LSI53C875
• Description: PCI to Ultra SCSI I/O Processor
• Manufacturer: LSI Logic

Figure 4.3
BYTEPAR2
BYTEPAR1
BYTEPAR0
4-4
DEVSEL/
FRAME/
C_BE3/
C_BE2/
C_BE1/
C_BE0/
PERR/
IDSEL
TRDY/
STOP/
AD23
AD22
AD21
AD20
AD19
AD18
AD17
AD16
IRDY/
AD15
AD14
AD13
AD12
AD11
AD10
V
V
V
PAR
AD9
AD8
AD7
V
V
V
V
V
V
V
V
DD-I
DD-I
DD-I
NC
NC
NC
NC
NC
NC
NC
NC
NC
SS
SS
SS
SS
SS
SS
SS
SS
Note: The decoupling capacitor arrangement shown in Figures 4.1 and 4.2 is recom-
17
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
mended to maximize the benefits of the internal split ground system. Capacitor val-
ues between 0.01 and 0.1 F should provide adequate noise isolation. Because of
the number of high current drivers on the LSI53C875, a multilayer PC board with
power and ground planes is required.
LSI53C875N Pin Diagram
Signal Descriptions
PCI to SCSI I/O Processor
Quad Flat Pack
LSI53C875N
208-Pin
156
156
155
155
154
154
153
153
152
152
151
151
150
150
149
149
148
148
147
147
146
146
145
145
144
144
143
143
142
142
141
141
140
140
139
139
138
138
137
137
136
136
135
135
134
134
133
133
132
132
131
131
130
130
129
129
128
128
127
127
126
126
125
125
124
124
123
123
122
122
121
121
120
120
119
119
118
118
117
117
116
115
114
113
112
111
110
109
108
107
106
105
NC
NC
NC
NC
NC
NC
SDIR7
SDIRP0
V
SD12/
SD13
SD14/
V
SD15/
SDP1/
SD0/
SD1/
V
SD2/
SD3/
SD4/
SD5/
V
SD6/
SD7/
SDP0/
SATN/
V
SBSY/
SACK/
SRST/
SMSG/
SSEL/
V
SC_D/
SREQ/
SI_0/
SD8/
V
SD9/
SD10/
SD11/
V
SDIR8
SDIR9
SDIR10
NC
NC
NC
NC
NC
NC
DD
DD
SS-S
SS-S
SS-S
SS-S
SS-S
SS-S