R8C2K datasheet(33/471 Pages) RENESAS

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R8C/2K Group, R8C/2L Group

3. Memory

Rev.1.10

Dec 21, 2007

Page 16 of 450

REJ09B0406-0110

3.2

R8C/2L Group

Figure 3.2 is a Memory Map of R8C/2L Group. The R8C/2L Group has 1 Mbyte of address space from addresses

00000h to FFFFFh.

The internal ROM (program ROM) is allocated lower addresses, beginning with address 0FFFFh. For example, a

16-Kbyte internal ROM area is allocated addresses 0C000h to 0FFFFh.

The fixed interrupt vector table is allocated addresses 0FFDCh to 0FFFFh. They store the starting address of each

interrupt routine.

The internal ROM (data flash) is allocated addresses 02400h to 02BFFh.

The internal RAM area is allocated higher addresses, beginning with address 00400h. For example, a 1.5-Kbyte

internal RAM is allocated addresses 00400h to 009FFh. The internal RAM is used not only for storing data but also

for calling subroutines and as stacks when interrupt requests are acknowledged.

Special function registers (SFRs) are allocated addresses 00000h to 002FFh. The peripheral function control

registers are allocated here. All addresses within the SFR, which have nothing allocated are reserved for future use

and cannot be accessed by users.

Figure 3.2

Memory Map of R8C/2L Group

Undefined instruction

Overflow

BRK instruction

Address match

Single step

Watchdog timer/oscillation stop detection/voltage monitor

(Reserved)

Reset

FFFFFh

0FFFFh

0YYYYh

00400h

002FFh

00000h

Internal ROM

(program ROM)

Internal RAM

SFR

(Refer to 4. Special

Function Registers

(SFRs))

0FFFFh

0FFDCh

Internal ROM

(data flash)(1)

NOTES:

1. Data flash block A (1 Kbyte) and B (1 Kbyte) are shown.

2. The blank regions are reserved. Do not access locations in these regions.

0XXXXh

02400h

02BFFh

Part Number

Internal ROM

Size

R5F212L2SNFP, R5F212L2SDFP,

R5F212L2SNXXXFP, R5F212L2SDXXXFP

R5F212L4SNFP, R5F212L4SDFP,

R5F212L4SNXXXFP, R5F212L4SDXXXFP

8 Kbytes

16 Kbytes

0E000h

0C000h

1 Kbyte

1.5 Kbytes

007FFh

009FFh

Address 0YYYYh

Address 0XXXXh

Internal RAM

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