7641 데이터 시트보기 (PDF) - Mitsumi

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7641

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Mitsumi 

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MITSUBISHI MICROCOMPUTERS

7641 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MEMORY

Special Function Register (SFR) Area

The Special Function Register area in the zero page contains control

registers such as I/O ports and timers.

RAM

RAM is used for data storage and for stack area of subroutine calls

and interrupts.

ROM

The first 128 bytes and the last 4 bytes of ROM are reserved for

device testing and the rest is user area for storing programs. In the

flash memory version, program and erase can be performed in the

reserved area.

Interrupt Vector Area

The interrupt vector area contains reset and interrupt vectors.

Zero Page

Access to this area with only 2 bytes is possible in the zero page

addressing mode.

Special Page

Access to this area with only 2 bytes is possible in the special page

addressing mode.

Refer to page 74 for the memory map of memory expansion and

microprocessor modes.

RAM area

M37641M8

M37641F8

RAM size

(bytes)

1024

2560

Address

XXXX16

046F16

0A6F16

000016

007016

SFR area

RAM

010016

XXXX16

100016

Reserved area (Note 1)

Not used

Zero page

800016

808016

Reserved ROM area

(128 bytes)

Fig. 9 Memory map diagram

ROM

SIZE: 32768 bytes

FF0016

FFC916

FFCA16

FFFC16

FFFF16

(Note 2)

SFR area

Interrupt vector area

Reserved ROM area

Notes 1: Reserved area in M37641F8.

2: SFR area in M37641F8.

Special page

12

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