M16CSLASH62M datasheet(43/615 Pages) RENESAS

43 / 615 page

Mitsubishi microcomputers

M16C / 62A Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Processor Mode

1-24

Single-chip mode

SFR area

Internal

RAM area

Inhibited

Internal

ROM area

Microprocessor mode

SFR area

Internal

RAM area

External

area

Internally

reserved area

0000016

0040016

XXXXX16

YYYYY16

FFFFF16

D000016

External area :

Accessing this area allows the user to

access a device connected externally

to the microcomputer.

0400016

Memory expansion mode

SFR area

Internal

RAM area

External

area

Internal

ROM area

Internally

reserved area

Internally

reserved area

Note : These memory maps show an instance in which PM13 is set to 0; but in the case of products in which the

internal RAM and the internal ROM are expanded to over 15 Kbytes and 192 Kbytes, respectively, they show

an instance in which PM13 is set to 1.

Address YYYYY16

3K bytes

00FFF16

053FF16

017FF16

013FF16

Address XXXXX16

ROM size

02BFF16

5K bytes

4K bytes

10K bytes

20K bytes

RAM size

32K bytes

C000016

E800016

F000016

E000016

96K bytes

64K bytes

128K bytes

256K bytes

F800016

Figure 1.7.2. Memory maps in each processor mode (without memory area expansion, normal mode)

Internal Reserved Area Expansion Bit (PM13)

This bit expands the internal RAM area and the internal ROM area, and changes the chip select area. In

M30624MGA/FGA, for example, to set this bit to “1” expands the internal RAM area and the internal ROM

area to 20 Kbytes and 256 Kbytes respectively. Refer to Figure 1.7.3 for the chip select area. When the

reset is revoked, this bit is set to “0”. To expand the internal area, set this bit to “1” in user program. And

the top of user program must be allocated to D000016 or subsequent address.

In the case of the product in which the internal ROM is 192 Kbytes or less and the internal RAM is 15

Kbytes or less, set this bit to “0” when this product is used in the memory expansion mode or the micro-

processor mode. When the product is used in the single chip mode, the internal area is not expanded and

any action is not affected, even if this bit is set to “1”.

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