HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 149

• Manufacturer Part Number: HD6417706
• Description: Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Whenever CCR2 bit 8 (W3LOCK) or bit 0 (W2LOCK) is high level the cache is locked. The
locked data will not be overwritten unless W3LOCK bit and W2LOCK bit are reset or the PREF
condition during cache locking mode watches. During cache locking mode, the LRU in table 5.1
will be replaced by tables 5.4 to 5.6.
Table 5.2
Note: Do not set 1 into W2LOAD and W3LOAD at the same time.
Table 5.3
Note: Do not set 1 into W2LOAD and W3LOAD at the same time.
Table 5.4
CL bit
0
1
1
1
1
1
1
CL bit
0
1
1
1
1
LRU (5 to 0)
000000, 000001, 000100, 010100, 100000, 100001, 110000, 110100
000011, 000110, 000111, 001011, 001111, 010110, 011110, 011111
101001, 101011, 111000, 111001, 111011, 111100, 111110, 111111
* Don't care
* Don't care
W3LOAD
*
*
*
0
0
0
1
W3LOAD
*
*
*
*
*
Way to be Replaced when Cache Miss Occurs during PREF Instruction
Execution
Way to be Replaced when Cache Miss Occurs during Execution of Instruction
other than PREF Instruction
LRU and Way Replacement (when W2LOCK=1)
W3LOCK
*
0
0
1
1
*
1
W3LOCK
*
0
0
1
1
W2LOAD
*
*
0
*
0
1
0
W2LOAD
*
*
*
*
*
W2LOCK
*
0
1
0
1
1
*
W2LOCK
*
0
1
0
1
Way to be Replaced
According to LRU (table 5.1)
According to LRU (table 5.1)
According to LRU (table 5.4)
According to LRU (table 5.5)
According to LRU (table 5.6)
Way 2
Way 3
Way to be Replaced
According to LRU (table 5.1)
According to LRU (table 5.1)
According to LRU (table 5.4)
According to LRU (table 5.5)
According to LRU (table 5.6)
Rev. 4.00, 03/04, page 103 of 660
Way to be Replaced
3
1
0