HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 260

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

9.3.2
Shadow Area
Areas 0, 3, and 4 are decoded by physical addresses A28 to A26, which correspond to areas B'000,
B'011, and B'100. 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 obtained by adding to it H'20000000 × n (n = 1 to 6). Addresses A25 and A24 are
ignored since addresses A23 to A0 are supported for the external pins of the address bus.
Accordingly, for example, H'01000000 to H'03FFFFFF in the area 0 is shadow space.
Area P4 (H'E0000000 to H'FFFFFFFF) is an internal I/O area and is assigned for internal register
addresses. Area P4 does not become shadow space.
Rev. 1.00, 02/04, page 222 of 804