7.
Memory Management Unit (MMU)
Rev.1.00 Jan. 10, 2008 Page 205 of 1658
REJ09B0261-0100
Bit Bit
Name
Initial
Value R/W
Description
30 to 8
⎯
All
0
R
Reserved
For details on reading from or writing to these bits, see
description in General Precautions on Handling of
Product.
7 to 0
UB
All 0
R/W
Buffered Write Control for Each Area (64 Mbytes)
When writing is performed without using the cache or in
the cache write-through mode, these bits specify
whether the CPU waits for the end of writing for each
area.
0: The CPU does not wait for the end of writing
1: The CPU stalls and waits for the end of writing
UB[7]: Corresponding to the control register area
UB[6:0]: These bits are invalid in 32-bit address
extended mode.
(2)
ITLB
The PPN field in the ITLB is extended to bits 31 to 10.
(3)
UTLB
The PPN field in the UTLB is extended to bits 31 to 10. The same UB bit as that in the PMB is
added in each entry of the UTLB.
•
UB: Buffered write bit
Specifies whether a buffered write is performed.
0: Buffered write (Subsequent processing proceeds without waiting for the write to complete.)
1: Unbuffered write (Subsequent processing is stalled until the write has completed.)
In a memory-mapped TLB access, the UB bit can be read from or written to by bit 9 in the data
array.
(4)
PTEL
The same UB bit as that in the PMB is added in bit 9 in PTEL. This UB bit is written to the UB bit
in the UTLB by the LDTLB instruction. The PPN field is extended to bits 31 to 10.
Summary of Contents for SH7781
Page 4: ...Rev 1 00 Jan 10 2008 Page iv of xxx REJ09B0261 0100 ...
Page 74: ...2 Programming Model Rev 1 00 Jan 10 2008 Page 44 of 1658 REJ09B0261 0100 ...
Page 272: ...8 Caches Rev 1 00 Jan 10 2008 Page 242 of 1658 REJ09B0261 0100 ...
Page 376: ...10 Interrupt Controller INTC Rev 1 00 Jan 10 2008 Page 346 of 1658 REJ09B0261 0100 ...
Page 694: ...13 PCI Controller PCIC Rev 1 00 Jan 10 2008 Page 664 of 1658 REJ09B0261 0100 ...
Page 762: ...14 Direct Memory Access Controller DMAC Rev 1 00 Jan 10 2008 Page 732 of 1658 REJ09B0261 0100 ...
Page 788: ...15 Clock Pulse Generator CPG Rev 1 00 Jan 10 2008 Page 758 of 1658 REJ09B0261 0100 ...
Page 828: ...17 Power Down Mode Rev 1 00 Jan 10 2008 Page 798 of 1658 REJ09B0261 0100 ...
Page 846: ...18 Timer Unit TMU Rev 1 00 Jan 10 2008 Page 816 of 1658 REJ09B0261 0100 ...
Page 1292: ...24 Multimedia Card Interface MMCIF Rev 1 00 Jan 10 2008 Page 1262 of 1658 REJ09B0261 0100 ...
Page 1326: ...25 Audio Codec Interface HAC Rev 1 00 Jan 10 2008 Page 1296 of 1658 REJ09B0261 0100 ...
Page 1482: ...28 General Purpose I O Ports GPIO Rev 1 00 Jan 10 2008 Page 1452 of 1658 REJ09B0261 0100 ...
Page 1538: ...30 User Debugging Interface H UDI Rev 1 00 Jan 10 2008 Page 1508 of 1658 REJ09B0261 0100 ...
Page 1688: ...Appendix Rev 1 00 Jan 10 2008 Page 1658 of 1658 REJ09B0261 0100 ...
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Page 1692: ...SH7785 Hardware Manual ...