32174 datasheet(72/881 Pages) RENESAS

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3-11

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

3.4 Internal RAM Area and SFR Area

The 8 Mbyte area at addresses H'0080 0000 to H'00FF FFFF in the user space accommodates the

internal RAM area and Special Function Register (SFR) area. Of this, a 128 Kbytes of address

space from H'0080 0000 to H'0081 FFFF is the area that the user can actually use. All other areas

here comprise a ghost area in units of 128 Kbytes. (When programming, do not use this ghost area

intentionally.)

3.4.1 Internal RAM Area

The internal RAM is located in the area shown below.

Table 3.4.1 Addresses at Which the Internal ROM is Located

Type Name

Size

Located address

M32170F6

40 Kbytes

H'0080 4000 - H'0080 DFFF

M32174F4

M32174F3

M32170F4

32 Kbytes

H'0080 4000 - H'0080 BFFF

M32170F3

3.4.2 Special Function Register (SFR) Area

Addresses H'0080 0000 to H'0080 3FFFF are the Special Function Register (SFR) area. This area

has registers for internal peripheral I/O located in it.

ADDRESS SPACE

3.4 Internal ROM/SFR Area

Figure 3.4.1 Internal RAM Area and Special Function Register (SFR) Area of the M32170F6

H’0080 0000

H’0080 DFFF

SFR area

(16 Kbytes)

Internal RAM

(40 Kbytes)

H’0080 3FFF

H’0080 4000

Virtual-flash emulation

areas separated in units of

8 Kbytes or 4 Kbytes can

be allocated here. For

details, refer to Section 6.7.

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