M16CSLASH62 datasheet(23/87 Pages) RENESAS

23 / 87 page

M16C/62 Group (M16C/62P, M16C/62PT)

page 23

3. Memory

Figure 3.1 is a memory map of the M16C/62P group. The address space extends the 1M bytes from

address 00000h to FFFFFh.

The internal ROM is allocated in a lower address direction beginning with address FFFFFh. For example, a

64-Kbyte internal ROM is allocated to the addresses from F0000h to FFFFFh.

As for the flash memory version, 4-Kbyte space (block A) exists in 0F000h to 0FFFFh. 4-Kbyte space is

mainly for storing data. In addition to storing data, 4-Kbyte space also can store programs.

The fixed interrupt vector table is allocated to the addresses from FFFDCh to FFFFFh. Therefore, store the

start address of each interrupt routine here.

The internal RAM is allocated in an upper address direction beginning with address 00400h. For example,

a 10-Kbyte internal RAM is allocated to the addresses from 00400h to 02BFFh. In addition to storing data,

the internal RAM also stores the stack used when calling subroutines and when interrupts are generated.

The SRF is allocated to the addresses from 00000h to 003FFh. Peripheral function control registers are

located here. Of the SFR, any area which has no functions allocated is reserved for future use and cannot

be used by users.

The special page vector table is allocated to the addresses from FFE00h to FFFDBh. This vector is used by

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

In memory expansion and microprocessor modes, some areas are reserved for future use and cannot be

used by users. Use M16C/62P (80-pin version) and M16C/62PT in single-chip mode. The memory expan-

sion and microprocessor modes cannot be used.

Figure 3.1 Memory Map

00000h

XXXXXh

External area

Internal ROM

(program area)

SFR

Internal RAM

Reserved area (1)

Reserved area (2)

FFFDCh

NOTES:

1. During memory expansion and microprocessor modes, can not be used.

2. In memory expansion mode, can not be used.

3. As for the flash memory version, 4-Kbyte space (block A) exists.

4. Shown here is a memory map for the case where the PM10 bit in the PM1 register is “1”

and the PM13 bit in the PM1 register is “1”.

Undefined instruction

Overflow

BRK instruction

Address match

Single step

Watchdog timer

Reset

Special page

vector table

DBC

NMI

4K bytes

013FFh

02BFFh

017FFh

Address XXXXXh

033FFh

10K bytes

5K bytes

12K bytes

Size

Address YYYYYh

Size

F0000h

E8000h

F4000h

96K bytes

48K bytes

64K bytes

Reserved area

External area

00400h

10000h

27000h

28000h

80000h

YYYYYh

FFFFFh

E0000h

256K bytes

128K bytes

192K bytes

D0000h

320K bytes

C0000h

384K bytes

B0000h

A0000h

512K bytes

80000h

063FFh

053FFh

07FFFh

24K bytes

20K bytes

31K bytes

Internal RAM

Internal ROM (3)

043FFh

16K bytes

FFE00h

FFFFFh

Internal ROM

(data area) (3)

0FFFFh

0F000h

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