M16CSLASH62 datasheet(38/621 Pages) RENESAS

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Mitsubishi microcomputers

M16C / 62 Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Memory Space Expansion Functions

(2) Expansion mode 1

In this mode, the memory space can be expanded by 176K bytes in addition to that in normal mode.

Figure 1.8.2 shows the memory location and chip select area in expansion mode 1.

_______

In accessing data in expansion mode 1, CS3, CS2, and CS1 go active in the area from 0400016 through

_______

2FFFF16; in fetching a program, CS0 goes active. That is, the address space is expanded by using the

________

_______

area from 0400016 through 2FFFF16 (176K bytes) appropriately for accessing data (CS3, CS2, CS1)

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and fetching a program (CS0).

Figure 1.8.2. Memory location and chip select area in expansion mode 1

Microprocessor

mode

SFR area

Internal RAM

area

External

area

Internal area reserved

0000016

0040016

XXXXX16

YYYYY16

FFFFF16

D000016

0800016

Memory

expansion mode

SFR area

Internal RAM

area

External area

Internal ROM

area

Internal area reserved

CS3(16K bytes)

CS2(128 Kbytes)

CS1(32K bytes)

2800016

3000016

0400016

Expansion mode 1 (memory space = 1.2M bytes for PM15 = 1, PM14 = 0)

CS0

Memory expansion

mode:

816K bytes

Microprocessor mode:

1008K bytes

0400016

2FFFF16

3000016

FFFFF16

176K bytes

= the extent of memory expanded

CS0:active both in fetching a program

and in accessing data

CS0:active in fetching a program

CS1, CS2, CS3:active in accessing data

Note 1: These memory maps show an instance in which PM13 is set to 0; but in the case of M30624MG/FG, they show an

instance in which PM13 is set to 1.

Note 2: The memory maps in single-chip mode are omitted.

M30622M4

00FFF16

F800016

C000016

053FF16

M30624MG/FG

M30620M8

02BFF16

F000016

E800016

017FF16

M30622MA

E000016

017FF16

M30622MC

M30620MA

E800016

02BFF16

M30622M8/E8

F000016

013FF16

Address XXXXX16

Type No.

Address YYYYY16

M30620MC/EC

E000016

02BFF16

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