UPD784937AGF-XXX-3BA View Datasheet(PDF) - NEC => Renesas Technology
Part Name
Description
Manufacturer
UPD784937AGF-XXX-3BA Datasheet PDF : 102 Pages
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µPD784935A,784936A,784937A,784938A
7. CPU ARCHITECTURE
7.1 Memory Space
A memory space of 1 MB can be accessed. Mapping of the internal data area (special function registers and internal
RAM) can be selected by using the LOCATION instruction. The LOCATION instruction must be always executed after
the reset signal has been cleared, and must not be used more than once.
(1) When LOCATION 0H instruction is executed
• Internal memory
The internal data area and internal ROM area are as follows:
Part Number
µPD784935A
µPD784936A
µPD784937A
µPD784938A
Internal Data Area
0EB00H to 0FFFFH
0E500H to 0FFFFH
0DF00H to 0FFFFH
0D600H to 0FFFFH
Internal ROM Area
00000H to 0EAFFH
10000H to 17FFFH
00000H to 0E4FFH
10000H to 1FFFFH
00000H to 0DEFFH
10000H to 2FFFFH
00000H to 0D5FFH
10000H to 3FFFFH
Caution The following area of the internal ROM that overlaps the internal data area cannot be used
when the LOCATION 0H instruction is executed.
Part Number
µPD784935A
µPD784936A
µPD784937A
µPD784938A
Unusable Area
0EB00H to 0FFFFH (5376 bytes)
0E500H to 0FFFFH (6192 bytes)
0DF00H to 0FFFFH (8448 bytes)
0D600H to 0FFFFH
• External memory
The external memory is accessed in the external memory expansion mode.
(2) When LOCATION 0FH instruction is executed
• Internal memory
The internal data area and internal ROM area are as follows:
Part Number
µPD784935A
µPD784936A
µPD784937A
µPD784938A
Internal Data Area
FEB00H to FFFFFH
FE500H to FFFFFH
FDF00H to FFFFFH
FD600H to FFFFFH
Internal ROM Area
00000H to 17FFFH
00000H to 1FFFFH
00000H to 2FFFFH
00000H to 3FFFFH
• External memory
The external memory is accessed in the external memory expansion mode.
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Data Sheet U13572EJ2V0DS
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