M37271MF-219SP datasheet(9/97 Pages) MITSUBISHI

Part #	M37271MF-219SP

Description	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER???

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Manufacturer	MITSUBISHI [Mitsubishi Electric Semiconductor]

Direct Link	http://www.mitsubishichips.com

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MITSUBISHI MICROCOMPUTERS

M37271MF-XXXSP

M37271EF-XXXSP, M37271EFSP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER

and ON-SCREEN DISPLAY CONTROLLER

9

MEMORY

Special Function Register (SFR) Area

The special function register (SFR) 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

ROM is used for storing user programs as well as the interrupt vector

area.

RAM for OSD

RAM for display is used for specifying the character codes and col-

ors to display.

ROM for OSD

ROM for display is used for storing character data.

Interrupt Vector Area

The interrupt vector area contains reset and interrupt vectors.

Zero Page

The 256 bytes from addresses 000016 to 00FF16 are called the zero

page area. The internal RAM and the special function registers (SFR)

are allocated to this area.

The zero page addressing mode can be used to specify memory and

register addresses in the zero page area. Access to this area with

only 2 bytes is possible in the zero page addressing mode.

Special Page

The 256 bytes from addresses FF0016 to FFFF16 are called the spe-

cial page area. The special page addressing mode can be used to

specify memory addresses in the special page area. Access to this

area with only 2 bytes is possible in the special page addressing

mode.

Fig. 2. Memory map

000016

00C016

00FF16

0FFF16

SFR1 area

Not used

FFFF16

FFDE16

FF0016

080016

Interrupt vector area

Not used

1080016

1FFFF16

Special page

ROM

(60 K bytes)

RAM for OSD (Note)

(1920 bytes)

RAM

(1024 bytes)

Zero page

020016

023F16

100016

SFR2 area

053F16

Not used

030016

Not used

1567F16

1800016

Not used

1E43F16

1000016

ROM for OSD

(14464 bytes)

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M37271MF-219SP Datasheet(PDF) 9 Page - Mitsubishi Electric Semiconductor

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