R8C datasheet(19/199 Pages) RENESAS

19 / 199 page

R8C/10 Group

3. Memory

Rev.1.20 Jan 27, 2006

page 9 of 180

REJ09B0019-0120

3. Memory

Figure 3.1 is a memory map of this MCU. This MCU provides 1-Mbyte address space from addresses

0000016 to FFFFF16.

The internal ROM is allocated lower addresses beginning with address 0FFFF16. For example, a 16-

Kbyte internal ROM is allocated addresses from 0C00016 to 0FFFF16.

The fixed interrupt vector table is allocated addresses 0FFDC16 to 0FFFF16. They store the starting

address of each interrupt routine.

The internal RAM is allocated higher addresses beginning with address 0040016. For example, a 1-Kbyte

internal RAM is allocated addresses 0040016 to 007FF16. The internal RAM is used not only for storing

data, but for calling subroutines and stacks when interrupt request is acknowledged.

Special function registers (SFR) are allocated addresses 0000016 to 002FF16. The peripheral function

control registers are located them. All addresses, which have nothing allocated within the SFR, are re-

served area and cannot be accessed by users.

Figure 3.1 Memory Map

0000016

0YYYY16

0FFFF16

002FF16

0040016

Internal ROM

SFR

(See Chapter 4 for details.)

0FFDC16

0FFFF16

Undefined instruction

Overflow

BRK instruction

Address match

Single step

Watchdog timer•Oscillation stop detection

Reset

(Reserved)

Type name

0XXXX16

Internal RAM

FFFFF16

Address 0XXXX16

005FF16

Internal RAM

Size

007FF16

512 bytes

1K bytes

006FF16

768 bytes

Address 0YYYY16

0E00016

Internal ROM

Size

0C00016

8K bytes

16K bytes

0D00016

12K bytes

Expansion area

(Reserved)

R5F21104FP, R5F21104DFP

R5F21103FP, R5F21103DFP

R5F21102FP, R5F21102DFP

NOTES :

1. Blank spaces are reserved. No access is allowed.

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