152 datasheet(19/135 Pages) RENESAS

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REJ03B0231-0110

Rev.1.10

Page 19 of 130

Sep 06, 2010

R32C/152 Group

3. Memory

Memory

Figure 3.1 shows the memory map of the R32C/152 Group.

The R32C/152 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 48-Kbyte internal RAM is mapped from 00000400h to 0000C3FFh. 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.

Figure 3.1

Memory Map

Internal RAM

SFR1

SFR2

Internal ROM

00000000h

FFFFFFFFh

Reset

NMI

Reserved

Watchdog timer (2)

Reserved

BRK instruction

Overflow

Undefined instruction

FFFFFFFFh

FFFFFFDCh

Notes:

1. Additional two 4-Kbyte spaces (blocks A and B) for storing data are provided in the flash memory version.

2. The watchdog timer interrupt shares the vector table with the oscillator stop detection interrupt and low

voltage detection interrupt.

YYYYYYYYh

00000400h

0000C400h

Reserved

00040000h

Internal ROM

(Data space) (1)

00060000h

00062000h

Reserved

00050000h

Reserved

Internal ROM

Capacity

YYYYYYYYh

768 Kbytes FFF40000h

1 Mbyte

FFF00000h

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