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4.1
Overview
4.1.1
Features
The SH7750 Series has an on-chip 8-kbyte instruction cache (IC) for instructions and 16-kbyte
operand cache (OC) for data. Half of the memory of the operand cache (8 kbytes) can also be used
as on-chip RAM. The features of these caches are summarized in table 4.1.
Table 4.1
Cache Features
Item
Capacity
Type
Line size
Entries
Write method
Item
Capacity
Addresses
Write
Write-back
Access right
Section 4 Caches
Instruction Cache
8-kbyte cache
Direct mapping
32 bytes
256
Store Queues
2 × 32 bytes
H'E000 0000 to H'E3FF FFFF
Store instruction (1-cycle write)
Prefetch instruction
MMU off: according to MMUCR.SQMD
MMU on: according to individual page PR
Operand Cache
16-kbyte cache or 8-kbyte cache +
8-kbyte RAM
Direct mapping
32 bytes
512
Copy-back/write-through selectable
Rev. 4.0, 04/00, page 61 of 850
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