Figure 3.8 Memory Map In Each Mode - Fujitsu F2MC-8L MB89620 Series Hardware Manual

n Memory Map in Each Mode
The memory map is different for single-chip mode, external ROM mode, and internal ROM/
external bus mode. Also, two types of bus operation are used: internal access and external
access.
Figure 3.8 shows the memory map in each mode.
External area
l Internal access
Used to access internal I/O, RAM, and ROM areas. In single-chip mode, only internal access is
used.
External access
l
Used to access externally connected devices such as RAM, ROM, or peripheral functions using
the external bus. Internal access is still available for internal I/O and RAM areas even when
external bus mode is enabled.
MB89620 series
Single-chip mode*
0000
H
Internal I/O area
0080
H
Internal RAM area
Not available
Internal ROM area
FFFF
H
: Internal access
*: The MB89628R, MB89629R, and MB89P629 support single-chip mode only.

Figure 3.8 Memory Map in Each Mode

External bus mode
Internal ROM/
External ROM mode
external bus mode
Internal I/O area Internal I/O area
Internal RAM area Internal RAM area
Internal ROM area
: External access
77
CHAPTER 3 CPU