M16CSLASH29 datasheet(47/499 Pages) RENESAS

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3. Memory

page 23

3. Memory

Figure 3.1

is a memory map of the M16C/29 Group. M16C/29 Group provides 1-Mbyte address space from

addresses 0000016 to FFFFF16. The internal ROM is allocated lower addresses beginning with address

FFFFF16. For example, 64-Kbytes internal ROM is allocated addresses F000016 to FFFFF16.

Two 2-Kbyte internal ROM areas, block A and block B, are available in the flash memory version. The

blocks are allocated addresses F00016 to FFFF16.

The fixed interrupt vector tables are allocated addresses FFFDC16 to FFFFF16. It stores the starting ad-

dress of each interrupt routine. See the section on interrupts for details.

The internal RAM is allocated higher addresses beginning with address 0040016. For example, 4-Kbytes

internal RAM is allocated addresses 0040016 to 013FF16. Besides sotring data, it becomes stacks when the

subroutines is called or an interrupt is acknowledged.

SFR, consisting of control registers for peripheral functions such as I/O port, A/D converter, serial I/O,

timers is allocated addresses 0000016 to 003FF16. All blank spaces within SFR are reserved and cannot be

accessed by users.

The special page vector table is allocated to the addresses FFE0016 to FFFDB16. This vector is used by the

JMPS or JSRS instruction. For details, refer to the M16C/60 and M16C/20 Series Software Manual.

Figure 3.1 Memory Map

0000016

XXXXX16

FFFFF16

0040016

YYYYY16

Internal ROM(2)

(program space)

SFR Area

Internal RAM

FFE0016

FFFDC16

FFFFF16

Undefined Instruction

Overflow

BRK Instruction

Address Match

Single Step

Watchdog Timer

Reset

Special Page

Vector Table

DBC

Reserved Space

Internal ROM

(data space)

Reserved Space

0F00016

XXXXX16

YYYYY16

Internal RAM area

Internal ROM area

Memory size

013FF16

023FF16

F000016

4 Kbytes

64 Kbytes

Memory size

E800016

96 Kbytes

NOTES:

1. The block A (2K bytes) and block B (2K bytes) are shown (only flash memory).

2. Do not write to the internal ROM area in Mask ROM ver..

(1)

0FFFF16

NMI

033FF16

8 Kbytes

E000016

128 Kbytes

12 Kbytes

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