R32C116_10 Datasheet, PDF (28/98 Pages) Renesas Technology Corp – RENESAS MCU

R32C/116 Group
3. Memory
3. Memory
Figure 3.1 shows the memory map of the R32C/116 Group.
The R32C/116 Group provides a 4-Gbyte address space from 00000000h to FFFFFFFFh.
The internal ROM is mapped to the end of the memory map with the ending address fixed at FFFFFFFFh.
Therefore, the 1-Mbyte internal ROM is mapped from FFF00000h to FFFFFFFFh.
The fixed interrupt vector table which contains each start address of interrupt handlers is mapped from
FFFFFFDCh to FFFFFFFFh.
The internal RAM is mapped to the beginning of the memory map with the starting address fixed at
00000400h. Therefore, the 63-Kbyte internal RAM is mapped from 00000400h to 0000FFFFh. Besides
being used for data storage, the internal RAM functions as a stack(s) for subroutines and/or interrupt
handlers.
Special Function Registers (SFRs), which are control registers for peripheral functions, are mapped from
00000000h to 000003FFh, and from 00040000h to 0004FFFFh. Unoccupied SFR locations are reserved.
No access is allowed.
In memory expansion mode or microprocessor mode, some spaces are reserved for internal use and should
not be accessed.
Internal RAM
Capacity XXXXXXXXh
40 Kbytes 0000A400h
48 Kbytes 0000C400h
63 Kbytes 00010000h
Internal ROM
Capacity YYYYYYYYh
384 Kbytes FFFA0000h
512 Kbytes FFF80000h
640 Kbytes FFF60000h
768 Kbytes FFF40000h
1 Mbyte FFF00000h
00000000h
00000400h
XXXXXXXXh
SFR1
Internal RAM
Reserved
00040000h
00050000h
00060000h
00062000h
SFR2
Reserved
Internal ROM
(Data space) ⁽¹⁾
Reserved
00080000h
External space ⁽²⁾
FFE00000h
YYYYYYYYh
FFFFFFFFh
Reserved ⁽³⁾
Internal ROM ⁽⁴⁾
FFFFFFDCh
FFFFFFFFh
Undefined instruction
Overflow
BRK instruction
Reserved
Reserved
Watchdog timer ⁽⁵⁾
Reserved
NMI
Reset
Notes:
1. Additional two 4-Kbyte spaces (blocks A and B) for storing data are provided in the flash memory version.
2. This space can be used in memory expansion mode or microprocessor mode. Addresses from 02000000h
to FDFFFFFFh are inaccessible.
3. This space is reserved in memory expansion mode. It can be external space in microprocessor mode.
4. This space can be used in single-chip mode or memory expansion mode. It can be external space in
microprocessor mode.
5. The watchdog timer interrupt shares the vector table with the oscillator stop detection interrupt and low
voltage detection interrupt.
Figure 3.1 Memory Map
REJ03B0253-0110 Rev.1.10
Jun 23, 2010
Page 28 of 95