Datasheet

R01DS0060EJ0160 Rev.1.60 Page 57 of 154
May 19, 2014
RX630 Group 3. Address Space
3.2 External Address Space
The external address space is divided into up to eight CS areas (CS0 to CS7), each corresponding to the CSn# signal
output from a CSn# (n = 0 to 7) pin.
Figure 3.2 shows the address ranges corresponding to the individual CS areas (CS0 to CS7) 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)
CS7 (16 Mbytes)
CS6 (16 Mbytes)
CS5 (16 Mbytes)
CS4 (16 Mbytes)
CS3 (16 Mbytes)
CS2 (16 Mbytes)
CS1 (16 Mbytes)
CS0 (16 Mbytes)
RAM
External address space
(CS area)
Reserved area*
1
Peripheral I/O registers
Reserved area*
1
Reserved area*
1
External address space*
2
0000 0000h
0008 0000h
0010 0000h
0100 0000h
0800 0000h
FF00 0000h
0002 0000h
0100 0000h
0200 0000h
0300 0000h
0400 0000h
0500 0000h
0600 0000h
0700 0000h
01FF FFFFh
02FF FFFFh
03FF FFFFh
04FF FFFFh
05FF FFFFh
06FF FFFFh
07FF FFFFh
FFFF FFFFh
FFFF FFFFh
FF00 0000h
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 0800 0000h is as shown in figure on
this section, Memory Map in Each Operating Mode.