M16CSLASH56D datasheet(22/85 Pages) RENESAS

22 / 85 page

REJ03B0307-0110 Rev.1.10 Dec 01, 2009

Page 22 of 83

M16C/5LD Group, M16C/56D Group

3. Memory

Memory

Special Function Registers (SFRs) are allocated from address 00000h to 003FFh and from 0D000h to

0D7FFh. Peripheral function control registers are located here. All blank spaces within SFRs are reserved,

so do not access any blank spaces.

The internal RAM is allocated from address 00400h to superior direction. For example, a 8-Kbyte internal

RAM is addressed from 00400h to 023FFh. The internal RAM is used not only for data storage but also for

stack area when subroutines are called or when interrupt request are acknowledged.

The internal ROM is flash memory. Three internal ROM areas are available: data flash, program ROM 1,

and program ROM 2.

The data flash is addressed from 0E000h to 0FFFFh. This data flash space is used not only for data storage

but also for program storage.

Program ROM 2 is assigned addresses 10000h to 13FFFh. Program ROM 1 is assigned addresses

FFFFFh to inferior direction. For example, the 64-Kbyte program ROM 1 space has addresses F0000h to

FFFFFh.

The special page vectors are assigned addresses FFE00h to FFFD7h. They are used for the JMPS

instruction and JSRS instruction. Refer to the M16C/60, M16C/20, M16C/Tiny Series Software Manual for

details.

The fixed vector table for interrupts, ID code write address, OFS1 address and OSF2 address are assigned

addresses FFFDBh to FFFFFh.

The 256 bytes beginning with the start address set in the INTB register compose the relocatable vector table

for interrupts.

Figure 3.1

Memory Map

Notes:

1. Do not access the reserved areas.

2. The figure above applies under the following conditions:

-The PM10 bit in the PM1 register is set to 1 (addresses from 0E000h to 0FFFFh are used as data flash)

-The PRG2C0 bit in the PRG2C register is set to 0 (program ROM 2 enabled)

00000h

XXXXXh

0D000h

00400h

0D800h

0E000h

10000h

14000h

YYYYYh

FFFFFh

FFFDBh

FFFD8h

FFE00h

256 bytes beginning with the start

address set in the INTB register

13FFFh

13FF0h

13000h

Reserved

Internal ROM

(Data flash)

Internal ROM

(Program ROM 2)

SFRs

Internal RAM

Reserved

Internal ROM

(Program ROM 1)

On-chip debugger

monitor area

User boot code area

Relocatable vector table

Special page vector

table

Reserved

Fixed vector table

ID code address

OFS1 address, OFS2

address

Internal RAM

Capacity

XXXXXh

4 Kbytes

013FFh

8 Kbytes

023FFh

12 Kbytes

033FFh

20 Kbytes

053FFh

Internal ROM

Capacity

YYYYYh

64 Kbytes

F0000h

96 Kbytes

E8000h

128 Kbytes

E0000h

256 Kbytes

C0000h

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