HD6417034B RENESAS [Renesas Technology Corp], HD6417034B Datasheet - Page 636
HD6417034B
Manufacturer Part Number
HD6417034B
Description
32-Bit RISC Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417034B.pdf
(687 pages)
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Appendix A On-Chip Supporting Module Registers
A.2.40
Start Address: H'5FFFFA0
Bus Width: 8/16/32
Bit
Read/Write
Bit
Read/Write
Table A.41 BCR Bit Functions
Bit
15
14
13
12
11
Rev. 7.00 Jan 31, 2006 page 610 of 658
REJ09B0272-0700
Initial value:
Initial value:
Bus Control Register (BCR)
Bit Name
DRAM enable (DRAME)
Multiplex I/O enable (IOE)
Warp mode (WARP)
RD duty (RDDTY)
Byte access select (BAS)
DRAME
R/W
15
—
—
0
7
0
R/W
IOE
14
—
—
0
6
0
WARP
R/W
13
—
—
0
5
0
Value
0
1
0
1
0
1
0
1
0
1
RDDTY
R/W
12
—
—
0
4
0
Description
Area 1 is external memory space
Area 1 is DRAM space
Area 6 is external memory space
Area 6 is address/data multiplex I/O space
Normal mode: External access and internal
access not performed simultaneously
Warp mode: External access and internal
access performed simultaneously
RD signal high width duty ratio is 50%
RD signal high width duty ratio is 35%
WRH, WRL, and A0 signals valid
WR, HBS, and LBS and signals valid
BAS
R/W
11
—
—
0
3
0
10
—
—
—
—
0
2
0
—
—
—
—
9
0
1
0
(Initial value)
(Initial value)
(Initial value)
(Initial value)
(Initial value)
—
—
—
—
8
0
0
0
BSC
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