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HD6417751 Datasheet, PDF (46/1105 Pages) Renesas Technology Corp – SuperH RISC engine | |||
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Table 1.1 SH7751 Series Features (cont)
Item
Cache memory
[SH7751]
Features
⢠Instruction cache (IC)
 8 kbytes, direct mapping
 256 entries, 32-byte block length
 Normal mode (8-kbyte cache)
 Index mode
⢠Operand cache (OC)
 16 kbytes, direct mapping
 512 entries, 32-byte block length
 Normal mode (16-kbyte cache)
 Index mode
 RAM mode (8-kbyte cache + 8-kbyte RAM)
 Choice of write method (copy-back or write-through)
⢠Single-stage copy-back buffer, single-stage write-through buffer
⢠Cache memory contents can be accessed directly by address mapping
(usable as on-chip memory)
⢠Store queue (32 bytes à 2 entries)
Cache memory
[SH7751R]
⢠Instruction cache (IC)
 16 kbytes, 2-way set associative
 256 entries/way, 32-byte block length
 Cache-double-mode (16-kbyte cache)
 Index mode
 SH7751-compatible mode (8 kbytes, direct mapping)
⢠Operand cache (OC)
 32 kbytes, 2-way set associative
 512 entries/way, 32-byte block length
 Cache-double-mode (32-kbyte cache)
 Index mode
 RAM mode (16-kbyte cache + 16-kbyte RAM)
 Choice of write method (copy-back or write-through)
 SH7751-compatible mode (16 kbytes, direct mapping)
⢠Single-stage copy-back buffer, single-stage write-through buffer
⢠Cache memory contents can be accessed directly by address mapping
(usable as on-chip memory)
⢠Store queue (32 bytes à 2 entries)
Rev. 3.0, 04/02, page 6 of 1064
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