UPD784044 Datasheet, PDF (20/90 Pages) NEC – 16-BIT SINGLE-CHIP MICROCONTROLLER

µPD784044(A), 784046(A)
Figure 6-2. µPD784046(A) Memory Map
FFFFFH
When LOCATION 0
instruction is executed
External memory^{Note 1}
(960K bytes)
0 FEF FH
General-purpose registers
(128 bytes)
0 FE8 0H
0 FE 7 FH
1 0 0 0 0H
0 F F F FH Special function registers (SFRs)
0 F FDFH
0 F FD0H
Note 1
0 FF 0 0H
(256 bytes)
Main RAM
0 FEF FH
Internal RAM
(2K bytes)
Peripheral
RAM
0 F 7 0 0H
0 F 6 F FH
0 F 6 0 0H
0 F 5 F FH
Cannot be used
(256 bytes)
0 F E 3 7 H _{Macro service control}
0 F E 0 6 H ^{word area (50 bytes)}
0FD0 0H
0 FCF FH
0 F 7 0 0H
Data area (512 bytes)
Program/data area
(1536 bytes)
0 F 5 0 0H
Note 2
Program/data area^{Note 3}
Note 4
Internal ROM
(62976 bytes)
0 0 0 0 0H
0 1 0 0 0H
0 0FFFH
0 1 0 0 0H
0 0 7FFH
0 0 0 8 0H
0 0 0 7FH
0 0 0 4 0H
0 0 0 3FH
0 0 0 0 0H
CALLF entry area
(2K bytes)
CALLT table area
(64 bytes)
Vector table area
(64 bytes)
FFEFFH
FFE8 0H
F FE 7 FH
FFE3 7H
FFE0 6H
FFD0 0H
FFCFFH
FF 7 0 0H
0 F F F FH
When LOCATION 0FH
instruction is executed
F F F F FH _{Special function registers (SFRs)}
FFFDFH
FFFD0H
Note 1
FFF 0 0H
(256 bytes)
FFEFFH
Internal RAM
(2K bytes)
FF 7 0 0H
F F 6 F FH
FF 6 0 0H
F F 5 F FH
Cannot be used
(256 bytes)
External memory^{Note 1}
(980480 bytes)
1 0 0 0 0H
0 F F F FH
0 0 0 0 0H
Internal ROM
(64K bytes)
Note 4
Notes 1. Accessed in the external memory expansion mode.
2. 2560 bytes in this area can be used as inernal ROM only when the LOCATION 0FH instruction is
executed.
3. When the LOCATION 0 instruction is executed: 62976 bytes
When the LOCATION 0FH instruction is executed: 65536 bytes
4. Base area or entry area by reset or interrupt. The internal RAM is not reset.
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