µPD784035(A), 784036(A)
6. CPU ARCHITECTURE
6.1 Memory Space
A 1M-byte memory space can be accessed. By using a LOCATION instruction, mode for mapping internal data
areas (special function registers and internal RAM) can be selected. A LOCATION instruction must always be
executed after a reset, and can be used only once.
(1) When the LOCATION 0 instruction is executed
• Internal memory
The table below indicates the internal data areas and internal ROM areas of each product.
Product name
µPD784035(A)
µPD784036(A)
Internal data area
0F700H-0FFFFH
Internal ROM area
00000H-0BFFFH
00000H-0F6FFH
Caution The following internal ROM areas, existing at the same addresses as the internal data areas,
cannot be used when the LOCATION 0 instruction is executed:
Product name
µPD784035(A)
µPD784036(A)
Unusable area
-
0F700H-0FFFFH (2 304 bytes)
• External memory
External memory is accessed in external memory expansion mode.
(2) When the LOCATION 0FH instruction is executed
• Internal memory
The table below lists the internal data areas and internal ROM areas for each product.
Product name
µPD784035(A)
µPD784036(A)
Internal data area
FF700H-FFFFFH
Internal ROM area
00000H-0BFFFH
00000H-0FFFFH
• External memory
External memory is accessed in external memory expansion mode.
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