R5F64112DFB datasheet(35/108 Pages) RENESAS

35 / 108 page

R01DS0062EJ0120 Rev.1.20

Page 35 of 99

Sep 26, 2011

R32C/111 Group

3. Memory

Memory

Figure 3.1 shows the memory map of the R32C/111 Group.

The R32C/111 Group provides a 4-Gbyte address space from 00000000h to FFFFFFFFh.

The internal ROM is mapped from address FFFFFFFFh in the inferior direction. For example, the 512-Kbyte

internal ROM is mapped from FFF80000h to FFFFFFFFh.

The fixed interrupt vector table contains the start address of interrupt handlers and is mapped from

FFFFFFDCh to FFFFFFFFh.

The internal RAM is mapped from address 00000400h in the superior direction. For example, 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 subroutine calls 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,

and no access is allowed.

In memory expansion mode or microprocessor mode, some spaces are reserved for internal use and should

not be accessed.

Figure 3.1

Memory Map

Internal RAM

SFR1

SFR2

00000000h

FFFFFFFFh

Reset

NMI

Reserved

BRK instruction

Overflow

Undefined instruction

Watchdog timer (5)

FFFFFFFFh

FFFFFFDCh

YYYYYYYYh

00000400h

XXXXXXXXh

Reserved

00040000h

Internal ROM

(Data space) (1)

00060000h

00062000h

00050000h

Reserved

Internal ROM

Capacity

YYYYYYYYh

512 Kbytes FFF80000h

External space (2)

Reserved

00080000h

Reserved (3)

FFE00000h

Internal ROM (4)

384 Kbytes FFFA0000h

Notes:

1. The flash memory version provides two additional 4-Kbyte spaces (blocks A and B) for storing data.

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 becomes an external space in microprocessor mode.

4. This space can be used in single-chip mode or memory expansion mode. It becomes an external space in

microprocessor mode.

5. The watchdog timer interrupt shares a vector with the oscillator stop detection interrupt and low voltage

detection interrupt.

256 Kbytes FFFC0000h

Internal RAM

Capacity

XXXXXXXXh

63 Kbytes

00010000h

40 Kbytes

0000A400h

32 Kbytes

00008400h

128 Kbytes FFFE0000h

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