Section 9 Bus State Controller (BSC)
Rev. 0.50 May 18, 2006 Page 228 of 1588
REJ09B0313-0050
Bit Bit
Name
Initial
Value
R/W Description
10, 9
BSZ[1:0]
11
*
R/W
Data Bus Width Specification
Specify the data bus widths of spaces.
00: Reserved (setting prohibited)
01: 8-bit size
10: 16-bit size
11: 32-bit size
For MPX-I/O, selects bus width by address
Notes:
1. If area 5 is specified as MPX-I/O, the bus
width can be specified as 8 bits or 16 bits
by the address according to the SZSEL bit
in CS5WCR by specifying the BSZ[1:0]
bits to 11. The fixed bus width can be
specified as 8 bits or 16 bits
2. The initial data bus width for areas 0 to 7
is specified by external pins. The BSZ[1:0]
bits settings in CS0BCR are ignored but
the bus width settings in CS1BCR to
CS7BCR can be modified.
3. If area 6 is specified as burst MPX-I/O
space, the bus width can be specified as
32 bits only.
4. If area 5 or area 6 is specified as PCMCIA
space, the bus width can be specified as
either 8 bits or 16 bits.
5. If area 2 or area 3 is specified as SDRAM
space, the bus width can be specified as
either 16 bits or 32 bits.
6. If area 0 is specified as clocked
synchronous burst ROM space, the bus
width can be specified as either 16 bits or
32 bits.
7. Area 7 cannot be used when the bus width
is specified as 8 bits. When using area 7,
the bus width should be specified as 16
bits or 32 bits for all areas in use.
8 to 0
All
0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
Note:
*
CSnBCR samples the external pins (MD) that specify the bus width at power-on reset.
Содержание Single-Chip Microcomputer SH7203
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Страница 242: ...Section 8 Cache Rev 0 50 May 18 2006 Page 212 of 1588 REJ09B0313 0050 ...
Страница 400: ...Section 9 Bus State Controller BSC Rev 0 50 May 18 2006 Page 370 of 1588 REJ09B0313 0050 ...
Страница 668: ...Section 11 Multi Function Timer Pulse Unit 2 MTU2 Rev 0 50 May 18 2006 Page 638 of 1588 REJ09B0313 0050 ...
Страница 696: ...Section 13 Watchdog Timer WDT Rev 0 50 May 18 2006 Page 666 of 1588 REJ09B0313 0050 ...
Страница 726: ...Section 14 Realtime Clock RTC Rev 0 50 May 18 2006 Page 696 of 1588 REJ09B0313 0050 ...
Страница 796: ...Section 15 Serial Communication Interface with FIFO SCIF Rev 0 50 May 18 2006 Page 766 of 1588 REJ09B0313 0050 ...
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Страница 1226: ...Section 23 USB 2 0 Host Function Module USB Rev 0 50 May 18 2006 Page 1196 of 1588 REJ09B0313 0050 ...
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Страница 1598: ...Section 31 Electrical Characteristics Rev 0 50 May 18 2006 Page 1568 of 1588 REJ09B0313 0050 ...
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