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

and ON-SCREEN DISPLAY CONTROLLER

M37272M6/M8–XXXSP/FP, M37272MA–XXXSP

M37272E8SP/FP, M37272EFSP

MITSUBISHI MICROCOMPUTERS

Rev. 1.5

1. DESCRIPTION

The M37272M6/M8-XXXSP/FP and M37272MA-XXXSP are single-

chip microcomputers designed with CMOS silicon gate technology.

They have a OSD, data slicer, and I

C-BUS interface, so it is useful

for a channel selection system for TV with a closed caption decoder.

The features of the M37272E8SP/FP and M37272EFSP are similar

to those of the M37272M6-XXXSP except that the chip has a built-in

PROM which can be written electrically. The difference between

M37272M6-XXXSP/FP, M37272M8-XXXSP/FP and M37272MA-

XXXSP are the ROM size and RAM size. Accordingly, the following

descriptions will be for the M37272M6-XXXSP/FP.

2. FEATURES

●Number of basic instructions .................................................... 71

●Memory size

ROM .............. 24K bytes

(

M37272M6-XXXSP/FP

)

32K bytes

(

M37272M8-XXXSP/FP, M37272E8SP/FP

)

40K bytes

(

M37272MA-XXXSP

)

60K bytes

(

M37272EFSP

)

RAM ...............

1024

bytes

(

M37272M6-XXXSP/FP

)

1152

bytes

(

M37272M8-XXXSP/FP, M37272E8SP/FP

)

1472

bytes

(

M37272MA-XXXSP, M37272EFSP

)

(*ROM correction memory included)

●Minimum instruction execution time

......................................... 0.5 µs

(at 8 MHz oscillation frequency)

●Power source voltage ................................................. 5 V ± 10 %

●Subroutine nesting .............................................128 levels (Max.)

●Interrupts....................................................... 17 types, 16 vectors

●8-bit timers .................................................................................. 6

●Programmable I/O ports (Ports P0, P1, P2, P3

0, P31) ............. 26

●Input ports (Ports P5

0, P51) ........................................................ 2

●Output ports (Ports P5

2–P55) ..................................................... 4

●12 V withstand ports ................................................................... 6

●LED drive ports ........................................................................... 4

●Serial I/O ............................................................8-bit ✕ 1 channel

●Multi-master I

C-BUS interface .............................. 1 (2 systems)

●A-D comparator (6-bit resolution) ................................ 6 channels

●PWM output circuit ......................................................... 8-bit ✕ 6

●Power dissipation

In high-speed mode ......................................................... 165 mW

(at V

CC = 5.5V, 8 MHz oscillation frequency, OSD on, and Data

slicer on)

In low-speed mode .........................................................0.33 mW

(at V

CC = 5.5V, 32 kHz oscillation frequency)

●ROM correction function ................................................ 2 vectors

●Closed caption data slicer

●OSD function

Display characters ................................... 32 characters ✕ 2 lines

(It is possible to display 3 lines or more by software)

Kinds of characters ........................................................ 254 kinds

Character display area............................ CC mode: 16 ✕ 26 dots

OSD mode: 16 ✕ 20 dots

Kinds of character sizes..................................... CC mode: 1 kind

OSD mode: 8 kinds

Kinds of character colors .................................. 8 colors (R, G, B)

Coloring unit................... character, character background, raster

Display position

Horizontal: 128 levels Vertical: 512 levels

Attribute ........................................................................................

CC mode: smooth italic, underline, flash, automatic solid space

OSD mode: border

Smoth roll-up

Window function

3. APPLICATION

TV with a closed caption decoder

1 2 3 4 5 6 7 8 9 ... 144 145

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