Title
Design considerations for a hardware-refreshed memory card for the MC68000
Abstract
Circuit complexity is the main disadvantage of using hardware rather than software to refresh dynamic RAM. Program overheads, withdrawal of interrupts from use, and increased demands on system components other than the microprocessor militate against the software solution. A hardware-refreshed 256 kbyte dynamic RAM card has been developed for use with 68000-based systems. The design includes a TMS 4500AML controller and a TMS 4164 64k dynamic RAM. The operation of the dynamic RAM is explained. The RAM is interfaced to the 68000 by the system's VME bus. The organization of the memory is discussed, and the steps in a software routine to test blocks of memory are outlined.
Year
DOI
Venue
1984
10.1016/0141-9331(84)90557-X
Microprocessors and Microsystems
Keywords
Field
DocType
microsystems 68000 dynamic RAM refresh
Cycle stealing,Tag RAM,Computer science,Real-time computing,Software,Computer hardware,Dynamic random-access memory,VMEbus,Non-volatile random-access memory,Parallel computing,Microprocessor,Operating system,Memory refresh,Embedded system
Journal
Volume
Issue
ISSN
8
8
0141-9331
Citations 
PageRank 
References 
1
0.43
0
Authors
2
Name
Order
Citations
PageRank
S. M. Said111.11
K. R. Dimond2113.86