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Glossary
ARM DDI 0363E Copyright © 2009 ARM Limited. All rights reserved. Glossary-15
ID013010 Non-Confidential, Unrestricted Access
Write-through (WT) In a write-through cache, data is written to main memory at the same time as the cache is
updated.
WT See Write-through.
Cache terminology diagram
The figure below illustrates the following cache terminology:
• block address
• cache line
• cache set
• cache way
• index
•tag.
Tag
Tag
Tag
Tag Index Word
Hit
(way number)
Read data
(way that corresponds)
=
3
1
Tag
0
0
2
1
3
4
5
6
7
n
Byte
Cache way
Cache set
m 1
2
0
Cache line
2
Block address
Line number
Word number
Cache tag RAM Cache data RAM