MB90335 Series
■ MEMORY MAP
Single chip mode (with ROM mirror function)
FFFFFFH
FF0000H
MB90V330A
ROM (FF bank)
FFFFFFH
FF0000H
MB90F337
ROM (FF bank)
FFFFFFH
FF0000H
MB90337
ROM (FF bank)
00FFFFH
008000H
007FFFH
007900H
ROM area
(image of FF bank)
Peripheral area
007100H
RAM area
(28 Kbytes)
000100H
0000FBH
000000H
Register
Peripheral area
00FFFFH
008000H
007FFFH
007900H
ROM area
(image of FF bank)
Peripheral area
00FFFFH
008000H
007FFFH
007900H
ROM area
(image of FF bank)
Peripheral area
001100H
000100H
0000FBH
000000H
RAM area
(4 Kbytes)
Register
Peripheral area
001100H
000100H
0000FBH
000000H
RAM area
(4 Kbytes)
Register
Peripheral area
Notes : • When the ROM mirror function register has been set, the mirror image data at higher addresses (“FF8000H
to FFFFFFH” ) of bank FF is visible from the higher addresses (“008000H to 00FFFFH”) of bank 00.
• The ROM mirror function is effective for using the C compiler small model.
• The lower 16-bit addresses of bank FF are equivalent to those of bank 00. Since the ROM area in
bank FF exceeds 48 Kbytes, however, the mirror image of all the data in the ROM area cannot be
reproduced in bank 00.
• When the C compiler small model is used, the data table mirror image can be shown at “008000H to
00FFFFH” by storing the data table at “FF8000H to FFFFFFH”.
Therefore, data tables in the ROM area can be referred without declaring the far addressing with
the pointer.
DS07-13735-6E
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