VR4102 datasheet(227/701 Pages) NEC

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VR4102 Datasheet(PDF) 227 Page - NEC

227 / 701 page

CHAPTER 8 CACHE MEMORY

227

Figure 8-19. Data Integrity on Hit_Writeback Operations

OK, DE = 1

or ERL = 1

OK, DE = 1

or ERL = 1

Start

Error

Tag Parity,

Wbit Parity

Cache Error

Exception

TagCheck

Writeback

Data

Parity

(See Figure 8-20)

Wbit

Wbit clear

END

Cache Error

Exception

Miss or Invalid

Error

Hit

= 1 (dirty)

= 0 (clean)

Wbit Parity check is

D-Cache only

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