Hitachi H8S/2646 Hardware Manual page 118

Modes 4 and 5
(advanced expanded modes
with on-chip ROM disabled)
H'000000
External address
space
H'FFAFFF
H'FFB000
Reserved area
H'FFDFFF
H'FFE000
On-chip RAM*
H'FFEFC0
External address
space
H'FFF800
Internal I/O registers
H'FFFF40
External address
space
H'FFFF60
Internal I/O registers
H'FFFFC0
On-chip RAM*
H'FFFFFF
Note:
* External addresses can be accessed by clearing th RAME bit in SYSCR to 0.
Figure 3-1 (1) Address Map in Each Operating Mode in the H8S/2646, H8S/2646R,
86
Mode 6
(advanced expanded mode
with on-chip ROM enabled)
H'000000
On-chip ROM
H'01FFFF
H'020000
External address
space
H'FFAFFF
H'FFB000
Reserved area
H'FFDFFF
H'FFE000
On-chip RAM*
H'FFEFC0
External address
space
H'FFF800
Internal I/O registers
H'FFFF40
External address
space
H'FFFF60
Internal I/O registers
H'FFFFC0
On-chip RAM*
H'FFFFFF
H8S/2648, and H8S/2648R
Mode 7
(advanced single-chip mode)
H'000000
On-chip ROM
H'01FFFF
H'FFE000
On-chip RAM
H'FFEFBF
H'FFF800
Internal I/O registers
H'FFFF3F
H'FFFF60
Internal I/O registers
H'FFFFC0
On-chip RAM
H'FFFFFF