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UPD178004A Datasheet(PDF) 14 Page - NEC

Part # UPD178004A
Description  8-BIT SINGLE-CHIP MICROCONTROLLERS
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD178004A Datasheet(HTML) 14 Page - NEC

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14
µPD178004A, 178006A, 178016A, 178018A
4. MEMORY SPACE
Figure 4-1 shows the
µPD178004A, 178006A, 178016A, and 178018A memory map.
Figure 4-1. Memory Map
Special Function Registers
(SFR) 256
× 8 bits
General-Purpose
Registers
32
× 8 bits
Internal High-Speed
RAM
1 024
× 8 bits
Use Prohibited
Buffer RAM 32
× 8 bits
Use Prohibited
Internal ROM Note 3
Data Memory
Space
Program Memory
Space
FFFFH
FF00H
FEFFH
FEE0H
FEDFH
FB00H
FAFFH
FAE0H
FADFH
FAC0H
FABFH
nnnnH + 1
nnnnH
0000H
Use Prohibited
Internal Expanded RAM
2 048
× 8 bits
Use Prohibited Note 2
FABFH
F800H
F7FFH
F000H
EFFFH
nnnnH + 1
Program Area
CALLF Entry Area
Program Area
CALLT Table Area
Vectored Table Area
nnnnH
1000H
0FFFH
0800H
07FFH
0080H
007FH
0040H
003FH
0000H
Note 1
Notes 1. Available only for
µPD178016A and 178018A
2. The
µPD178018A does not contain this use prohibited area.
3. The internal ROM capacity depends on the version (see the table below).
Corresponding Product
Internal ROM Last Address
Name
nnnnH
µPD178004A
7FFFH
µPD178006A, 178016A
BFFFH
µPD178018A
EFFFH


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