M32C8B_09 Datasheet, PDF (21/69 Pages) Renesas Technology Corp – RENESAS MCU

M32C/8B Group
3. Memory
3. Memory
Figure 3.1 shows a memory map of the M32C/8B Group.
The M32C/8B Group has 16-Mbyte address space from addresses 000000h to FFFFFFh.
The internal ROM is allocated in lower addresses, beginning with address FFFFFFh. For example, a 256-Kbyte
internal ROM area is allocated in addresses FC0000h to FFFFFFh.
The fixed interrupt vectors are allocated in addresses FFFFDCh to FFFFFFh. They store the starting address of each
interrupt routine.
The internal RAM is allocated higher addresses, beginning with address 000400h. For example, a 32-Kbyte internal
RAM area is allocated in addresses 000400h to 0083FFh. The internal RAM is used not only for storing data but for
the stacks when subroutines are called or when interrupt requests are acknowledged.
SFRs are allocated in addresses 000000h to 0003FFh. The peripheral function control registers such as for I/O ports,
A/D converters, serial interfaces, timers are allocated here. All blank spaces within SFRs are reserved and cannot be
accessed by users.
The special page vectors are allocated addresses FFFE00h to FFFFDBh. They are used for the JMPS instruction and
JSRS instruction. Refer to the Renesas publication M32C/80 Series Software Manual for details.
Internal RAM
Capacity
32 Kbytes
XXXXXXh
0083FFh
Internal ROM
Capacity
YYYYYYh
128 Kbytes
FE0000h
256 Kbytes
FC0000h
000000h
000400h
XXXXXXh
00E000h
00FFFFh
SFR
Internal RAM
Reserved
Internal ROM⁽³⁾
(Data space)
External space⁽¹⁾
F00000h
YYYYYYh
FFFFFFh
Reserved⁽²⁾
Internal ROM⁽⁴⁾
FFFE00h
FFFFDCh
Special page
vector table
Undefined instruction
Overflow
BRK instruction
Address match
Watchdog timer ⁽⁵⁾
FFFFFFh
NMI
Reset
NOTES:
1. The space is used as the external space in memory expansion mode and microprocessor mode. It is reserved in single-chip mode.
2. The space is reserved in single-chip mode and memory expansion mode. It is used as the external space in microprocessor mode.
3. Additional two blocks of 4-Kbyte space are provided in the flash memory version to store data. This space is used in single-chip mode
and memory expansion mode. It is reserved in microprocessor mode.
4. This space is used as the internal ROM in single-chip mode and memory expansion mode. It is used as the external space in
microprocessor mode.
5. The watchdog timer interrupt, oscillation stop detection interrupt, and voltage monitor interrupt share the same vector.
Figure 3.1 Memory Map
REJ03B0242-0100 Rev.1.00 Nov 01, 2009
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