R0K572011S000BE Renesas Electronics America, R0K572011S000BE Datasheet - Page 217

• Manufacturer Part Number: R0K572011S000BE
• Description: KIT STARTER FOR SH7201
• Manufacturer: Renesas Electronics America
• Series: Renesas Starter Kits (RSK)r
• Type: MCUr

Specifications of R0K572011S000BE

• Contents: CPU Board, LCD Display Module, E8 Emulator, Cable, QuickStart Guide and CD-ROM
• For Use With/related Products: SH7201
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

SH7201 Group
Table 8.6
Table 8.7
8.3
Operations for the operand cache are described here. Operations for the instruction cache are
similar to those for the operand cache except for the address array not having the U bit, and there
being no prefetch operation or write operation, or a write-back buffer.
8.3.1
If the operand cache is enabled (OCE bit in CCR1 is 1), whenever data in a cache-enabled area is
accessed, the cache will be searched to see if the desired data is in the cache. Figure 8.2 illustrates
the method by which the cache is searched.
Entries are selected using bits 10 to 4 of the address used to access memory and the tag address of
that entry is read. At this time, the upper three bits of the tag address are always cleared to 0. Bits
31 to 11 of the address used to access memory are compared with the read tag address. The
address comparison uses all four ways. When the comparison shows a match and the selected
entry is valid (V = 1), a cache hit occurs. When the comparison does not show a match or the
selected entry is not valid (V = 0), a cache miss occurs. Figure 8.2 shows a hit on way 1.
R01UH0026EJ0300 Rev. 3.00
Sep 24, 2010
LRU (Bits 5 to 0)
000000, 000001, 000011, 001011, 100000, 100001, 101001, 101011
000100, 000110, 000111, 001111, 010100, 010110, 011110, 011111
110000, 110100, 111000, 111001, 111011, 111100, 111110, 111111
LRU (Bits 5 to 0)
000000, 000001, 000011, 000100, 000110, 000111, 001011, 001111,
010100, 010110, 011110, 011111
100000, 100001, 101001, 101011, 110000, 110100, 111000, 111001,
111011, 111100, 111110, 111111
Operation
Searching Cache
LRU and Way Replacement (when W2LOCK=0 and W3LOCK=1)
LRU and Way Replacement (when W2LOCK=1 and W3LOCK=1)
Way to be Replaced
2
1
0
Way to be Replaced
1
0
Section 8 Cache
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