R5F21112FP datasheet(9/29 Pages) RENESAS

9 / 29 page

Rev.1.40

Sep 30, 2004

page 9 of 26

REJ03B0034-0140Z

R8C/11 Group

3. Memory

Figure 3.1 is a memory map of this MCU. The address space extends the 1M bytes from address 0000016

to FFFFF16.

The internal ROM is allocated in a lower address direction beginning with address 0FFFF16. For example,

a 16-Kbyte internal ROM is allocated to the addresses from 0C00016 to 0FFFF16.

The fixed interrupt vector table is allocated to the addresses from 0FFDC16 to 0FFFF16. Therefore, store

the start address of each interrupt routine here.

The internal RAM is allocated in an upper address direction beginning with address 0040016. For example,

a 1-Kbyte internal RAM is allocated to the addresses from 0040016 to 007FF16. In addition to storing data,

the internal RAM also stores the stack used when calling subroutines and when interrupts are generated.

Special function registers (SFR) are allocated to the addresses from 0000016 to 002FF16. Peripheral func-

tion control registers are located here. Of the SFR, any space which has no functions allocated is reserved

for future use and cannot be used 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,Voltage 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

Expanding area

(Reserved)

R5F21114FP, R5F21114DFP

R5F21113FP, R5F21113DFP

R5F21112FP, R5F21112DFP

NOTES :

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

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