32174 datasheet(71/881 Pages) RENESAS

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3-10

32170/32174 Group User's Manual (Rev. 2.1)

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 this microcomputer'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 Internal ROM is Located

Type Name

Size

Located address

MF32170F6

768 Kbytes

H'0000 0000 - H'000B FFFF

MF32170F4, M32174F4

512 Kbytes

H'0000 0000 - H'0007 FFFF

MF32170F3, M32174F3

384 Kbytes

H'0000 0000 - H'0005 FFFF

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 this microcomputer's operation mode. For access to this extended

external area, this microcomputer outputs the control signals necessary to access external

devices.

________

_______

This microcomputer's CS0 and CS1 signals are output corresponding to the address mapping of

________

_______

the extended 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

Operation Mode

Address mapping of the extended external area

Single-chip mode

None

Extended external mode

Addresses H'0010 0000 to H'001F FFFF (CS0 area: 1 Mbytes)

Addresses H'0020 0000 to H'003F FFFF (CS1 area: 2 Mbytes)

Processor mode

Addresses H'0000 0000 to H'001F FFFF (CS0 area: 2 Mbytes)

Addresses H'0020 0000 to H'003F FFFF (CS1 area: 2 Mbytes)

ADDRESS SPACE

3.3 Internal ROM/Extended External Area

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