RX610 Group
4. Address Space
R01UH0032EJ0120 Rev.1.20
Page 101 of 1006
Feb 20, 2013
4.2
External Address Space
The external address space is divided into up to 8 areas, each corresponding to the CSi# signal output from a CSi# (i = 0
to 7) pin. Figure 4.5 shows the address ranges corresponding to the individual CSi# signals (CSi areas, i = 0 to 7) in
on-chip ROM disabled external extended mode.
0000 0000h
0008 0000h
On-chip RAM
External address space
Reserved area
*
0010 0000h
Peripheral /O registers
0100 0000h
0800 0000h
FF00 0000h
Reserved area
0002 0000h
Reserved area
External address space
*
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
FFFF FFFFh
FF00 0000h
CS0 (16 Mbytes)
Note:
*
CS0 area is disabled in on-chip ROM enabled external extended mode.
In this mode, the address space for addresses above 0800 0000h is as shown in figure 4.1.
Figure 4.5 Correspondence between External Address Spaces and CSi Areas
(In On-Chip ROM Disabled External Extended Mode)