r5s77631ay266bgv Renesas Electronics Corporation., r5s77631ay266bgv Datasheet - Page 223

• Manufacturer Part Number: r5s77631ay266bgv
• Description: Renesas 32-bit Risc Microcomputer Superhtm Risc Engine Family Sh-4a Series
• Manufacturer: Renesas Electronics Corporation.

• SH: Share status bit
• SZ[1:0]: Page size bits
• V: Validity bit
• PPN: Physical page number
• PR[1:0]: Protection key data
When 0, pages are not shared by processes.
When 1, pages are shared by processes.
Specify the page size.
00: 1-Kbyte page
01: 4-Kbyte page
10: 64-Kbyte page
11: 1-Mbyte page
Indicates whether the entry is valid.
0: Invalid
1: Valid
Cleared to 0 by a power-on reset.
Not affected by a manual reset.
Upper 22 bits of the physical address of the physical page number.
With a 1-Kbyte page, PPN[28:10] are valid.
With a 4-Kbyte page, PPN[28:12] are valid.
With a 64-Kbyte page, PPN[28:16] are valid.
With a 1-Mbyte page, PPN[28:20] are valid.
The synonym problem must be taken into account when setting the PPN (see section 6.4.5,
Avoiding Synonym Problems).
2-bit data expressing the page access right as a code.
00: Can be read from only in privileged mode
01: Can be read from and written to in privileged mode
10: Can be read from only in privileged or user mode
11: Can be read from and written to in privileged mode or user mode
Section 6 Memory Management Unit (MMU)
Rev. 1.00 Oct. 01, 2007 Page 157 of 1956
REJ09B0256-0100