UPD780078 Datasheet, PDF (417/592 Pages) NEC – 8-Bit Single-Chip Microcontrollers

CHAPTER 20 EXTERNAL DEVICE EXPANSION FUNCTION
The memory maps when the external device expansion function is used are as follows.
Figure 20-1. Memory Map When Using External Device Expansion Function
(a) Memory map of µPD780076, 780076Y, and of
µPD78F0078, 78F0078Y when flash memory size
is 48 KB
(b) Memory map of µPD780078, 780078Y and of
µPD78F0078, 78F0078Y when flash memory size
is 60 KB
FFFFH
FF00H
FEFFH
SFR
FFFFH
FF00H
FEFFH
SFR
Internal high-speed RAM
Internal high-speed RAM
FB00H
FAFFH
F800H
F7FFH
Reserved
FB00H
FAFFH
F800H
F7FFH
Reserved
Internal expansion RAM
Internal expansion RAM
F400H
F3FFH
F400H
F3FFH
Full-address mode
(when MM2 to MM0 = 111)
or
16 KB expansion mode
(when MM2 to MM0 = 101)
Full-address mode
(when MM2 to MM0 = 111)
or
16 KB expansion mode
(when MM2 to MM0 = 101)
or
4 KB expansion mode
(when MM2 to MM0 = 100)
D000H
CFFFH
C100H
C0FFH
C000H
BFFFH
0000H
4 KB expansion mode
(when MM2 to MM0 = 100)
256-byte expansion mode
(when MM2 to MM0 = 011)
Single-chip mode
F100H
F0FFH
F000H
EFFFH
0000H
256-byte expansion mode
(when MM2 to MM0 = 011)
Single-chip mode
User’s Manual U14260EJ3V1UD
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