R5F5631ADDFB datasheet(53/108 Pages) RENESAS

53 / 108 page

R01DS0098EJ0090 Rev.0.90

Page 53 of 106

Dec 27, 2011

RX63N Group, RX631 Group

3. Address Space

3.2

External Address Space

The external address space is classified into CS areas (CS0 to CS7) and SDRAM area (SDCS).

Figure 3.2 shows the address ranges corresponding to the individual CS areas (CS0 to CS7) and SDRAM area (SDCS)

in on-chip ROM disabled extended mode.

Figure 3.2

Correspondence between External Address Spaces and CS Areas

(In On-Chip ROM Disabled Extended Mode)

Reserved area*1

0000 0000h

0008 0000h

On-chip RAM

External address space

(CS area)

0010 0000h

Peripheral I/O registers

0100 0000h

0800 0000h

FF00 0000h

0002 0000h

External address space

(CS area)*2

0100 0000h

0200 0000h

0300 0000h

0400 0000h

0500 0000h

0600 0000h

0700 0000h

CS7 (16 Mbytes)

01FF FFFFh

02FF FFFFh

03FF FFFFh

04FF FFFFh

05FF FFFFh

06FF FFFFh

07FF FFFFh

CS6 (16 Mbytes)

CS5 (16 Mbytes)

CS4 (16 Mbytes)

CS3 (16 Mbytes)

CS2 (16 Mbytes)

CS1 (16 Mbytes)

FFFF FFFFh

FF00 0000h

CS0 (16 Mbytes)

Note 1.

Reserved areas should not be accessed.

Note 2.

The CS0 area is disabled in on-chip ROM enabled extended mode.

In this mode, the address space for addresses above 1000 0000h is as shown in figure on

this section, Memory Map in Each Operating Mode.

External address space

(SDRAM area)

1000 0000h

0FFF FFFFh

0800 0000h

SDCS (128 Mbytes)

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