3069RF-ZTAT Datasheet, PDF (87/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

3.6 Memory Map in Each Operating Mode
Figures 3.1 and 3.2 show memory maps of the H8/3069R. The address space is divided into eight
areas.
The EMC bit in BCR can be read and written to select either of the two memory maps. For details,
see section 6.2.5, Bus Control Register (BCR).
The initial bus mode differs between modes 1 and 2, and also between modes 3 and 4.
The address locations of the on-chip RAM and on-chip registers differ between the 1-Mbyte
modes (modes 1, 2, and 7), and the 16-Mbyte modes (modes 3, 4, and 5). The address range
specifiable by the CPU in the 8- and 16-bit absolute addressing modes (@aa:8 and @aa:16) also
differs.
3.6.1 Note on Reserved Areas
The H8/3069R memory map includes reserved areas to which read/write access is prohibited.
Note that normal operation is not guaranteed if the following reserved areas are accessed.
• The reserved area in the internal I/O register space.
The H8/3069R internal I/O register space includes a reserved area to which access is
prohibited. For details see appendix B, Internal I/O Registers.
Rev. 5.0, 09/04, page 65 of 978