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SH7713 bảng dữ liệu(PDF) 231 Page - Renesas Technology Corp

tên linh kiện SH7713
Giải thích chi tiết về linh kiện  Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
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Section 5 Memory Management Unit (MMU)
Rev.1.50 Aug. 30, 2006 Page 191 of 860
REJ09B0288-0150
5.2.2
Page Table Entry Register Low (PTEL)
The page table entry register low (PTEL) register residing at address H'FFFFFFF4, and used to
store the physical page number and page management information to be recorded in the TLB by
the LDTLB instruction. The contents of this register are only modified in response to a software
command.
Bit
Bit Name
Initial
Value
R/W
Description
31 to 29
All 0
R/W
Reserved
These bits are always read as 0. The write value
should always be 0.
28 to 10
PPN
R
Number of Physical Page
9
0
R/W
8
V
7
0
6, 5
PR
4
SZ
3
C
2
D
1
SH
0
0
Page management information
For more details, see section 5.3, TLB Functions
5.2.3
Translation Table Base Register (TTB)
The translation table base register (TTB) residing at address H'FFFFFFF8, which points to the
base address of the current page table. The hardware does not set any value in TTB automatically.
TTB is available to software for general purposes. The initial value is undefined.
5.2.4
MMU Control Register (MMUCR)
The MMU control register (MMUCR) residing at address H'FFFFFFE0, which makes the MMU
settings described in figure 5.3. Any program that modifies MMUCR should reside in the P1 or P2
area.



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