Analog Devices Blackfin ADSP-BF537 Hardware Reference Manual page 1161

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A cache write policy (also known as copyback). The write data is written

only to the cache line. The modified cache line is written to source mem-

ory only when it is replaced.

write through.

A cache write policy (also known as store through). The write data is writ-

ten to both the cache line and to source memory. The modified cache line

is not written to the source memory when it is replaced.

ADSP-BF537 Blackfin Processor Hardware Reference