M38747MCT-XXXG View Datasheet(PDF) - MITSUBISHI ELECTRIC

Part Name

Description

View to exact match

M38747MCT-XXXG

Single-chip 8-bit CMOS microcomputer. ROM 61440 bytes, RAM 2048 bytes. Mask ROM version.

MITSUBISHI ELECTRIC  

MITSUBISHI MICROCOMPUTERS

3874 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MEMORY

Special Function Register (SFR) Area

The Special Function Register area in the zero page contains con-

trol 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 2 bytes of ROM are reserved for

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

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.

RAM area

RAM size

(bytes)

1024

1536

2048

Address

XXXX16

043F16

063F16

083F16

ROM area

ROM size

(bytes)

16384

20480

24576

28672

32768

36864

40960

45056

49152

53248

57344

61440

Address

YYYY16

C00016

B00016

A00016

900016

800016

700016

600016

500016

400016

300016

200016

100016

Address

ZZZZ16

C08016

B08016

A08016

908016

808016

708016

608016

508016

408016

308016

208016

108016

Fig. 9 Memory map diagram

000016

004016

SFR area

RAM

010016

020016

030016

Serial I/O3

automatic transfer

RAM area

XXXX16

Not used

YYYY16

Reserved ROM area

(128 bytes)

ZZZZ16

Zero page

ROM

FF0016

FFDC16

Interrupt vector area

FFFE16

FFFF16 Reserved ROM area

Special page

12

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