Renesas R8C/17 Technical Information PDF herunterladen (Seite 16)

R8C/16 Group, R8C/17 Group 3. Memory

Rev.2.00 Jan 30, 2006 Page 14 of 35

REJ03B0101-0200

3.2 R8C/17 Group

Figure 3.2 is a memory map of the R8C/17 group. The R8C/17 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/17 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

S iz e 0YYYYh

R5F21174SP, R5F21174DSP

R5F21173SP, R5F21173DSP

R5F21172SP, R5F21172DSP

16 Kbytes

12 Kbytes

8 Kbytes

0C000h

0D000h

0E000h

1 Kbyte

768 bytes

512 bytes

007FFh

006FFh

005FFh

FFFFFh

0FFFFh

0YYYYh

0XXXXh

00400h

002FFh

00000h

Expansion Area

Internal RAM

0FFFFh

0FFDCh

S iz e 0XXXXh

02BFFh

02400h

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.

Internal ROM

(Program ROM)

Internal ROM

(Data flash)

(1)

SFR

(See 4. Special Function

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 39 40

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