LSI53C875 LSI Logic, LSI53C875 Datasheet - Page 303

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

Figure B.3
Note: MAD bus sense logic enabled for 256 Kbytes of fast memory (150 ns device @ 33 MHz). The HCT374s
LSI53C875
may be replaced with HCT377s.
256 Kbyte Interface with 150 ns Memory
MAS0/
MAS1/
MAD[7:0]
GPIO4
MWE/
MOE/
MCE/
Bus
External Memory Interface Diagram Examples
MAD[1:0] Bus
+ 12 V
MAD1
MAD2
8
8
2
4.7 K
4.7 K
D7
CK
D0
D7
CK
D0
D1
CK
D0
Control
HCT374
HCT374
V
HCT377
PP
V
SS
Q0
Q7
Q0
0E
Q7
Q0
0E
Q1
0E
8
8
8
2
Optional - for Flash Memory only, not
required for EEPROMS.
V
PP
A[7:0]
A[15:8]
A[17:16]
D[7:0]
WE
OE
CE
27C020-15/
28F020-15/
Socket
B-3