R8CSLASH15 datasheet(26/277 Pages) RENESAS

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R8C/14 Group, R8C/15 Group

3. Memory

Rev.2.10

Jan 19, 2006

Page 14 of 253

REJ09B0164-0210

3.2

R8C/15 Group

Figure 3.2 is a Memory Map of R8C/15 Group. The R8C/15 group provides 1-Mbyte 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 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 is allocated higher addresses beginning with address 00400h. For example, a 1-

Kbyte internal RAM is allocated addresses 00400h to 007FFh. 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 00000h to 002FFh. The peripheral function

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

reserved area and cannot be accessed by users.

Figure 3.2

Memory Map of R8C/15 Group

Undefined Instruction

Overflow

BRK Instruction

Address Match

Single Step

Watchdog Timer • Oscillation Stop Detection • Voltage Monitor 2

Address Break

(Reserved)

Reset

Part Number

Internal ROM

Internal RAM

Size

0YYYYh

R5F21154SP, R5F21154DSP

R5F21153SP, R5F21153DSP

R5F21152SP, R5F21152DSP

16K bytes

12K bytes

8K bytes

0C000h

0D000h

0E000h

1K byte

768 bytes

512 bytes

007FFh

006FFh

005FFh

FFFFFh

0FFFFh

0YYYYh

0XXXXh

00400h

002FFh

00000h

Internal ROM

(Program ROM)

Expansion Area

Internal RAM

SFR

(See 4. Special Function

0FFFFh

0FFDCh

Size

0XXXXh

02BFFh

02400h

Internal ROM

(Data Flash)(1)

NOTES:

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

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

R8C/15 Datasheet(PDF) 26 Page - Renesas Technology Corp

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