HD6417751 Datasheet, PDF (128/1105 Pages) Renesas Technology Corp – SuperH RISC engine

Table 4.2 Cache Features (SH7751R)
Item
Capacity
Instruction Cache
16-kbyte cache
Type
Line size
Entries
Write method
Replace method
2-way set-associative
32 bytes
256 entry/way
LRU (Least Recently Used)
algorithm
Operand Cache
32-kbyte cache or 16-kbyte cache +
16-kbyte RAM
2-way set-associative
32 bytes
512 entry/way
Copy-back/write-through selectable
LRU (Least Recently Used)
algorithm
Table 4.3 Store Queue Features
Item
Capacity
Addresses
Write
Write-back
Access right
Store Queues
2 × 32 bytes
H'E000 0000 to H'E3FF FFFF
Store instruction (1-cycle write)
Prefetch instruction (PREF instruction)
MMU off: according to MMUCR.SQMD
MMU on: according to individual page PR
4.1.2 Register Configuration
Table 4.4 shows the cache control registers.
Table 4.4 Cache Control Registers
Name
Initial
Abbreviation R/W Value*¹
P4
Address*²
Area 7
Address*²
Access
Size
Cache control
register
CCR
R/W H'0000 0000 H'FF00 001C H'1F00 001C 32
Queue address QACR0
control register 0
R/W Undefined H'FF00 0038 H'1F00 0038 32
Queue address QACR1
control register 1
R/W Undefined H'FF00 003C H'1F00 003C 32
Notes: *1 The initial value is the value after a power-on or manual reset.
*2 P4 address is the address when using the virtual/physical address space P4 area. The
area 7 address is the address used when making an access from physical address
space area 7 using the TLB.
Rev. 3.0, 04/02, page 88 of 1064