Datasheet
R01DS0052EJ0140 Rev.1.40 Page 50 of 150
2014.07.16
RX62N Group, RX621 Group 3. Address Space
3. Address Space
3.1 Address Space
This LSI has a 4-Gbyte address space, consisting of the range of addresses from 0000 0000h to FFFF FFFFh. That is,
linear access to an address space of up to 4 Gbytes is possible, and this contains both program and data areas.
Figure 3.1 shows the memory maps in the respective operating modes. Accessible areas will differ according to the
operating mode and states of control bits.
Figure 3.1 Memory Map in Each Operating Mode
Reserved area
*
1
Reserved area
*
1
Note 1. Rserved areas should not be accessed, since the correct operation of LSI is not guaranteed if they are accessed.
Note 2. The address space in boot mode and user boot mode is the same as the address space in single-chip mode.
0000 0000h
0008 0000h
FFFF FFFFh
Single-chip mode
*
2
On-chip RAM
Reserved area
*
1
On-chip ROM (program ROM)
(read only)
0010 0000h
Peripheral I/O registers
0010 8000h
On-chip ROM
(data flash)
0080 0000h
0100 0000h
On-chip ROM (program ROM)
(write only)
FFF8 0000h
FCU-RAM
Reserved area
*
1
Peripheral I/O registers
Reserved area
*
1
Peripheral I/O registers
007F 8000h
007F A000h
007F C000h
007F C500h
007F FC00h
0001 8000h
0000 0000h
0008 0000h
FFFF FFFFh
On-chip ROM enabled
extended mode
On-chip RAM
Reserved area
*
1
On-chip ROM (program ROM)
(read only)
0010 0000h
Peripheral I/O registers
0010 8000h
On-chip ROM
(data flash)
0080 0000h
0100 0000h
On-chip ROM (program ROM)
(write only)
0800 0000h
FFF8 0000h
On-chip ROM (FCU firmware)
(read only)
FEFF E000h
FF00 0000h
Reserved area
*
1
FCU-RAM
Reserved area
*
1
Peripheral I/O registers
Reserved area
*
1
Peripheral I/O registers
007F 8000h
007F A000h
007F C000h
007F C500h
007F FC00h
0001 8000h
Reserved area
*
1
External address space
(CS area)
0000 0000h
0008 0000h
FFFF FFFFh
On-chip ROM disabled
extended mode
On-chip RAM
External address space
(CS area)
Reserved area
*
1
0010 0000h
Peripheral I/O registers
0100 0000h
0800 0000h
FF00 0000h
Reserved area
*
1
0001 8000h
Reserved area
*
1
External address space
Reserved area
*
1
Reserved area
*
1
00F8 0000h
00F8 0000h
1000 0000h
On-chip ROM (FCU firmware)
(read only)
Reserved area
*
1
FEFF E000h
FF00 0000h
1000 0000h
External address space
(SDRAM area)
External address space
(SDRAM area)
FF7F C000h
FF80 0000h
Reserved area
*
1
On-chip ROM (user boot)
(read only)
Reserved area
*
1
FF7F C000h
FF80 0000h
Reserved area
*
1
On-chip ROM (user boot)
(read only)