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3
3.3 Internal ROM Area and Extended External Area
The 8 Mbyte area at addresses H'0000 0000 to H'007F FFFF in the user space accommodates the
internal ROM and extended external areas. Of this, a 4 Mbytes of address space from H'0000 0000
to H'0003 FFFF is the area that the user can actually use. All other areas here comprise a 4 Mbytes
of ghost area. (When programming, do not use this ghost area intentionally.)
For details on how the internal ROM and extended external areas are located differently depending
on the 32170's operation modes set, refer to Section 3.2, "Operation Modes."
3.3.1 Internal ROM Area
The internal ROM is located in the area shown below. Also, this area has an EIT vector entry
(and ICU vector table) located in it at the beginning.
Table 3.3.1 Addresses at Which the 32170's Internal ROM is Located
Type Name
MF32170F6
MF32170F4
MF32170F3
3.3.2 Extended External Area
An extended external area is provided only when extended external mode or processor mode has
been selected when setting the 32170's operation mode. For access to this extended external area,
the 32170 outputs the control signals necessary to access external devices.
________
The 32170's CS0 and CS1 signals are output corresponding to the address mapping of the ex-
tended external area. The CS0 signal is output for the CS0 area, and the CS1 signal is output for
the CS1 area.
Table 3.3.2 Address Mapping of the Extended External Area in Each Operation Mode of the
32170
Operation Mode
Single-chip mode
Extended external mode
Processor mode
Size
768 Kbytes
512 Kbytes
384 Kbytes
_______
________
Address mapping of the extended external area
None
Addresses H'0010 0000 to H'001F FFFF (CS0 area: 1 Mbytes)
Addresses H'0020 0000 to H'003F FFFF (CS1 area: 2 Mbytes)
Addresses H'0000 0000 to H'001F FFFF (CS0 area: 2 Mbytes)
Addresses H'0020 0000 to H'003F FFFF (CS1 area: 2 Mbytes)
3-8
3.3 Internal ROM/Extended External Area
Located address
H'0000 0000 - H'000B FFFF
H'0000 0000 - H'0007 FFFF
H'0000 0000 - H'0005 FFFF
_______
ADDRESS SPACE
Ver.0.10
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