UPD784044 Datasheet, PDF (19/90 Pages) NEC – 16-BIT SINGLE-CHIP MICROCONTROLLER

µPD784044(A), 784046(A)
Figure 6-1. µPD784044(A) Memory Map
When LOCATION 0
instruction is executed
FFFFFH
External memory ^{Note 1}
(960K bytes)
0 FEF FH
General-purpose registers
(128 bytes)
0 FE8 0H
0 FE 7 FH
FFEFFH
F FE8 0H
F FE 7 FH
1 0 0 0 0H
0 F F F FH ^{Special function registers (SFRs)}
0 F FD FH Note 1
0 F FD 0H
0 F F 0 0H
(256 bytes)
0 FE F FH
Internal memory
0 FB 0 0H
(1K bytes)
0 FA F FH
Cannot be used
(1280 bytes)
Main RAM
Peripheral
RAM
0 F 6 0 0H
0 F 5 F FH
Note 2
External memory ^{Note 1}
(30208 bytes)
0 8 0 0 0H
0 7FFFH
0 0 0 0 0H
Internal ROM
(32K bytes)
0 FE 3 7H _{Macro service control}
0 FE 0 6H ^{word area (50 bytes)}
F FE3 7H
F FE0 6H
0FD0 0H
0 FCF FH
0 FB 0 0H
Data area (512 bytes)
Program/data area
(512 bytes)
FFD0 0H
FFCFFH
F FB 0 0H
0 7FFFH
0 1 0 0 0H
0 0FFFH
0 0 8 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
Program/data area
(32K bytes)
CALLF entry area
(2K bytes)
CALLT table area
(64 bytes)
Vector table area
(64 bytes)
When LOCATION 0FH
instruction is executed
F F F F F H Special function registers (SFRS)
FFFDFH
FFFD0H
Note 1
F F F 0 0H
(256 bytes)
FFEFFH
Internal RAM
F FB 0 0H
F FA F FH
(1K bytes)
Cannot be used
(1280 bytes)
F F 6 0 0H
F F 5 F FH
External memory^{Note 1}
(1013248 bytes)
1 0 0 0 0H
0 F F F FH
0 8 0 0 0H
0 7FFFH
0 0 0 0 0H
Note 2
Internal ROM
(32K bytes)
Notes 1. Accessed in the external memory expansion mode.
2. Base area or entry area by reset or interrupt. The internal RAM is not reset.
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