Cache Size Selection
433 mainboard supports exter
nal cache memory s izes of
1 28KB, 256KB, 5 1 2KB, and
I MB
.
Cache memory is popu
lated by eight Data SRAM and
one Tag S R A M .
C ac h e
memory is organized into two
banks, w ith four S RAM as
signed to each bank. The Data
S R A M supported i n 4 3 3
mainboard is 32Kx8, 64Kx8,
and 1 28Kx8, the Tag SRAM
can be 8Kx8, 3 2K x 8 , and
64Kx8.
KB Cache Memory
Cache
BankO
Bank1
Data RAM
Data RAM
Size
U15, 16, 17,18
U27, 28, 29,
30
128KB
32 Kx8
Empty
KB Cache Memory
Cache
BankO
Bank1
Data RAM
Data RAM
Size
U15, 16, 17, 18
U27, 28, 29, 30
256KB
32K x8
32Kx8
• 20 User's Manual
••
••
•
I
I
I
I
2
!:0 :::0 ::;
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Tag RAM
Cacheable Range
U26
Write-Through
Write-Back
8Kx8
32MB
16MB
I
I
I
I
2
'
•
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!(;;)
•
,
• •
I··
•
• • • !••
:=tl :=tl :=tl
:=tl
:::::: N
\.;..)
:i:
Tag RAM
Cacheable Range
U26
Write-Through
Write-Back
32Kx 8
64MB
32MB
