NEC uPD78056Y User Manual

Page 512

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512

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

PD78P054, 78P058,

(b) Memory map of

PD78P054, 78P058,

78P058Y when the

PD78052, 78052Y

78P058Y when the

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)

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This manual is related to the following products:

PD78056Y, PD78055Y, PD78058, PD78052Y, PD78P058Y, PD78P054, PD78054Y, uPD78054Y, PD78056, PD78058Y, uPD78058Y, uPD78052, uPD78055Y, PD78053Y, uPD78052Y, uPD78054, uPD78P058, uPD78053, PD78052(A), uPD78053Y, uPD78056, PD78055, uPD78058, uPD78P054, PD78052, PD78053(A), PD78053, PD78054(A)

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