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VR4102 Datasheet(PDF) 225 Page - NEC

Part # VR4102
Description  64/32-bit Microprocessor
PDF  701 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

VR4102 Datasheet(HTML) 225 Page - NEC

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CHAPTER 8 CACHE MEMORY
225
Figure 8-15. Data Integrity on Create_Dirty Operations
OK, DE = 1
or ERL = 1
Start
Error
Tag Parity,
Wbit Parity
Cache Error
Exception
TagCheck
Writeback
Data
Parity
(See Figure 8-20)
Valid bit &
Wbit
Valid bit and
Wbit set.
Tag write.
Wbit parity
and Tag parity
generate.
END
Cache Error
Exception
Miss or Invalid
Error
Hit
= 1 (dirty)
OK, DE = 1
or ERL = 1
= 0
(clean)
Figure 8-16. Data Integrity on Hit_Invalidate Operations
Hit
Start
Error
TagParity
Cache Error
Exception
Valid bit clear.
Tag parity generate.
END
TagCheck
OK, DE = 1
or ERL = 1
Miss or
Invalid



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