R5F211B2DSP datasheet(34/339 Pages) RENESAS

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R8C/1A Group, R8C/1B Group

3. Memory

Rev.1.30

Dec 08, 2006

Page 18 of 315

REJ09B0252-0130

Memory

3.1

R8C/1A Group

Figure 3.1 is a Memory Map of R8C/1A Group. The R8C/1A Group has 1 Mbyte of address space from

addresses 00000h to FFFFFh.

The internal 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 RAM is allocated higher addresses, beginning with address 00400h. For example, a 1-

Kbyte internal RAM area is allocated addresses 00400h to 007FFh. 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 3.1

Memory Map of R8C/1A Group

Undefined instruction

Overflow

BRK instruction

Address match

Single step

Watchdog timer•oscillation stop detection•voltage monitor 2

Address break

(Reserved)

Reset

FFFFFh

0FFFFh

0YYYYh

0XXXXh

00400h

002FFh

00000h

Internal ROM

Expanded area

Internal RAM

SFR

(See 4. Special Function

Registers (SFRs))

0FFFFh

0FFDCh

NOTE:

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

Part Number

Internal ROM

Internal RAM

Size

Address

0YYYYh

R5F211A4SP, R5F211A4DSP, R5F211A4DD, R5F211A4NP,

R5F211A4XXXSP, R5F211A4DXXXSP, R5F211A4XXXDD,

R5F211A4XXXNP

R5F211A3SP, R5F211A3DSP, R5F211A3DD, R5F211A3NP,

R5F211A3XXXSP, R5F211A3DXXXSP, R5F211A3XXXDD,

R5F211A3XXXNP

R5F211A2SP, R5F211A2DSP, R5F211A2DD, R5F211A2NP,

R5F211A2XXXSP, R5F211A2DXXXSP, R5F211A2XXXDD,

R5F211A2XXXNP

R5F211A1SP, R5F211A1DSP, R5F211A1DD,

R5F211A1XXXSP, R5F211A1DXXXSP, R5F211A1XXXDD

16 Kbytes

12 Kbytes

8 Kbytes

4 Kbytes

0C000h

0D000h

0E000h

0F000h

1 Kbyte

768 bytes

512 bytes

384 bytes

007FFh

006FFh

005FFh

0057Fh

Size

Address

0XXXXh

R5F211B2DSP Datasheet(PDF) 34 Page - Renesas Technology Corp

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