M16CSLASH62 datasheet(40/621 Pages) RENESAS

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Mitsubishi microcomputers

M16C / 62 Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Memory Space Expansion Functions

(3) Expansion mode 2

In expansion mode 2, the data bank register (0000B16) goes effective. Figure 1.8.4 shows the data bank

Figure 1.8.4. Data bank register

Data bank register

Symbol

Address

When reset

DBR

000B16

0016

Bit name

Description

Bit symbol

OFS

Offset bit

0: Not offset

1: Offset

BSR

Bank selection bits

0 0 0: Bank 0

0 0 1: Bank 1

0 1 0: Bank 2

0 1 1: Bank 3

1 0 0: Bank 4

1 0 1: Bank 5

1 1 0: Bank 6

1 1 1: Bank 7

Nothing is assigned.

In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”.

Nothing is assigned.

In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”.

b5 b4 b3

Microprocessor

mode

SFR area

Internal RAM area

External area

Internal area reserved

0000016

0040016

XXXXX16

YYYYY16

FFFFF16

D000016

0800016

Memory

expansion mode

SFR are

Internal RAM area

External area

Internal ROM area

Internal area reserved

CS3(16K bytes)

CS2(128K bytes)

CS1 (96K bytes)

2800016

4000016

0400016

Expansion mode 2 (memory space = 4M bytes for PM15 = 1, PM14 = 1)

CS0

Addresses from 4000016 through BFFFF16

Bank 7 in fetching a program

A bank selected by use of the bank selection

bits in accessing data

Addresses from C000016 through FFFFF16

Bank 7 invariably

Bank number is output to CS3 to CS1

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.

Memory expansion mode:

512K bytes x 7banks +

256K bytes

Microprocessor mode:

512K bytes x 8banks

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

Figure 1.8.5. Memory location and chip select area in expansion mode 2

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