LSI 53C875A Manual De Usuario

LSI53C875A PCI to Ultra SCSI Controller

B-1

Appendix B
External Memory
Interface Diagram
Examples

Appendix B has example external memory interface diagrams.

Figure B.1

16 Kbyte Interface with 200 ns Memory

LSI53C875A

27C128

MOE/

MCE/

MAD[7:0]

Bus

A[7:0]

A[13:8]

MAS0/

MAS1/

Note: MAD[3:1] pulled LOW internally. MAD bus sense logic enabled for 16 Kbyte of slow memory (200 ns

devices @ 33 MHz).

HCT374

D[7:0]

MAD0

4.7 K

HCT374