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CHAPTER 22 EXTERNAL DEVICE EXPANSION FUNCTION
Memory maps when using the external device expansion function are as follows.
Figure 22-1. Memory Map when Using External Device Expansion Function (1/4)
(a) Memory map of
µ
PD78P054, 78P058, (b) Memory map of
µ
PD78P054, 78P058,
78P058Y when the
µ
PD78052, 78052Y 78P058Y when the
µ
PD78053, 78053Y
and internal PROM are 16 Kbytes and internal PROM are 24 Kbytes
FFFFH
SFR
Internal High-Speed RAM
FF00H
FEFFH
FD00H
FCFFH
FAE0H
FADFH
FAC0H
FABFH
FA80H
FA7FH
8000H
7FFFH
0000H
Reserved
Internal Buffer RAM
Reserved
Full-Address Mode
(when MM2-MM0=111)
Single-chip Mode
16-Kbyte Expansion Mode
(when MM2-MM0=101)
5000H
4FFFH
4100H
40FFH
4000H
3FFFH
4-Kbyte Expansion Mode
(when MM2-MM0=100)
256-byte Expansion Mode
(when MM2-MM0=011)
FFFFH
SFR
Internal High-Speed RAM
FF00H
FEFFH
FB00H
FAFFH
FAE0H
FADFH
FAC0H
FABFH
FA80H
FA7FH
A000H
9FFFH
0000H
Reserved
Internal Buffer RAM
Reserved
Full-Address Mode
(when MM2-MM0=111)
Single-chip Mode
16-Kbyte Expansion Mode
(when MM2-MM0=101)
7000H
6FFFH
6100H
60FFH
6000H
5FFFH
4-Kbyte Expansion Mode
(when MM2-MM0=100)
256-byte Expansion Mode
(when MM2-MM0=011)