HD6417034B RENESAS [Renesas Technology Corp], HD6417034B Datasheet - Page 159
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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Area 1: Area 1 is an area with address bits A26–A24 set to 001 and an address range of
H'1000000–H'1FFFFFF and H'9000000–H'9FFFFFF. Figure 8.6 shows a memory map of area 1.
Area 1 can be set for use as DRAM space or external memory space with the DRAM enable bit
(DRAME) in the bus control register (BCR). When the DRAME bit is 0, area 1 is external
memory space; when DRAME is 1, it is DRAM space.
In external memory space, the bus width is 8 bits when the A27 bit is 0 and 16 bits when it is 1.
Bits A23 and A22 are not output and the shadow is in 4-Mbyte units. When external memory is
accessed, the CS1 signal is valid.
DRAM space is a type of external memory space, but it is configured especially to be connected to
DRAM, so it outputs strobe signals required for this purpose. The access size is 8 bits when
Note:
H'8FFFFFF
H'800FFFF
H'8FF0000
H'8000000
H'8010000
The bus width of area 0 is determined by the MD2-MD0 pins regardless of the A27 bit setting.
32-bit space
Logical address space
H'0FFFFFF
H'000FFFF
H'0FF0000
H'0000000
H'0010000
MD2–MD0 = 010
32-bit space
Shadow
Shadow
Shadow
Shadow
Shadow
Shadow
Figure 8.5 Memory Map of Area 0
• Valid
• CS0 not
• On-chip
On-chip ROM
Actual space
(64 kbytes)
addresses
A15–A0
(A23–A16
ignored)
valid
ROM
space
valid in
SH7034
only
H'8BFFFFF
H'8FFFFFF
H'83FFFFF
H'87FFFFF
H'8C00000
H'8000000
H'8400000
H'8800000
Rev. 7.00 Jan 31, 2006 page 133 of 658
H'0FFFFFF
H'0BFFFFF
H'03FFFFF
H'07FFFFF
H'0C00000
Section 8 Bus State Controller (BSC)
H'0000000
H'0400000
H'0800000
Logical address space
bit space
8 or 16
MD2–MD0 = 000 or 001
Shadow
Shadow
Shadow
Shadow
bit space
8 or 16
REJ09B0272-0700
• MD2–MD0 =
• Valid
• CS0 valid
• Long wait
Actual space
000: 8-bit
access,
001: 16-bit
access
addresses
A21–A0
(A23 and
A22 not
output)
function
(4 Mbytes)
External
memory
space
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