Freescale Semiconductor MPC8260 User Manual
Page 1328
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
Glossary-10
Freescale Semiconductor
Write-back. A cache memory update policy in which processor write cycles are directly
written only to the cache. External memory is updated only indirectly, for
example, when a modified cache block is cast out to make room for newer data.
Write-through. A cache memory update policy in which all processor write cycles are
written to both the cache and memory.