HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 347
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HD6417320
Manufacturer Part Number
HD6417320
Description
Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417320.pdf
(1524 pages)
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9.3
9.3.1
In the architecture of this LSI, both virtual spaces and physical spaces have 32-bit address spaces.
The upper three bits divide into the P0 to P4 areas, and specify the cache access method. For
details see section 5, Cache. The remaining 29 bits are used for division of the space into ten areas
(address map 1) or eight areas (address map 2) according to the MAP bit in CMNCR setting. The
BSC performs control for this 29-bit space.
As listed in tables 9.2 and 9.3, this LSI can be connected directly to eight or six areas of memory,
and it outputs chip select signals (CS0, CS2 to CS4, CS5A, CS5B, CS6A, and CS6B) for each of
them. CS0 is asserted during area 0 access; CS5A is asserted during area 5A access when address
map 1 is selected; and CS5B is asserted when address map 2 is selected.
9.3.2
The BSC decodes A28 to A25 of the physical address and generates chip select signals that
correspond to areas 0, 2 to 4, 5A, 5B, 6A, and 6B. Address bits A31 to A29 are ignored. This
means that the range of area 0 addresses, for example, is H'00000000 to H'03FFFFFF, and its
corresponding shadow space is the address space in P1 to P3 areas obtained by adding to it
H'20000000 × n (n = 1 to 6).
The address range for area 7 is H'1C000000 to H'1FFFFFFF. The address space H'1C000000 +
H'20000000 × n to H'1FFFFFFF + H'20000000 × n (n = 0 to 6) corresponding to the area 7
shadow space is reserved, so do not use it.
Area P4 (H'E0000000 to H'EFFFFFFF) is an I/O area and is assigned for internal register
addresses. Therefore, area P4 does not become shadow space.
Area Overview
Area Division
Shadow Area
Rev. 3.00 Jan. 18, 2008 Page 285 of 1458
Section 9
Bus State Controller (BSC)
REJ09B0033-0300
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