MITSUBISHI MICROCOMPUTERS
M37270MF-XXXSP
M37270EF-XXXSP, M37270EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
OSD function
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DESCRIPTION
The M37270MF-XXXSP is a single-chip microcomputer designed with
CMOS silicon gate technology. It is housed in a 64-pin shrink plastic
molded DIP.
Display characters ...............................40 characters ✕ 16 lines
Kinds of characters ..................................................... 320 kinds
(In EXOSD mode, they can be combined with 32 kinds of extra
fonts)
In addition to their simple instruction sets, the ROM, RAM and I/O
addresses are placed on the same memory map to enable easy pro-
gramming.
Dot structure ........................................ CC mode : 16 ✕ 26 dots
OSD mode : 16 ✕ 20 dots
The M37270MF-XXXSP has a OSD function and a data slicer func-
tion, so it is useful for a channel selection system for TV with a closed
caption decoder. The features of the M37270EF-XXXSP and the
M37270EFSP are similar to those of the M37270MF-XXXSP except
that these chips have a built-in PROM which can be written electri-
cally.
EXOSD mode : 16 ✕ 26 dots
Kinds of character sizes ................................ CC mode : 2 types
OSD mode : 14 types
EXOSD mode : 6 types
It can be specified by a character unit (maximum 7 kinds).
Character font coloring, character background coloring
It can be specified by a screen unit (maximum 7 kinds).
Extra font coloring, raster coloring, border coloring
Kinds of character colors ............... CC mode : 7 kinds (R, G, B)
OSD mode : 15 kinds (R, G, B, I)
FEATURES
Number of basic instructions ..................................................... 71
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Memory size
EXOSD mode : 7 kinds (R, G, B, I1, I2)
Display position
ROM ........................................................60 K bytes
RAM........................................................ 1024 bytes
ROM for OSD ....................................... 14464 bytes
RAM for OSD ......................................... 1920 bytes
Horizontal ................................................................ 256 levels
Vertical .................................................................. 1024 levels
Attribute ...................... CC mode : smooth italic, underline, flash
OSD mode : border
The minimum instruction execution time
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.......................................... 0.5µs (at 8 MHz oscillation frequency)
EXOSD mode : border,
Power source voltage .................................................. 5 V ± 10 %
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extra font (32 kinds)
Subroutine nesting ............................................. 128 levels (Max.)
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Automatic solid space function
Interrupts ....................................................... 18 types, 16 vectors
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Window function
8-bit timers .................................................................................. 6
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Dual layer OSD function
Programmable I/O ports (Ports P0, P1, P2, P30, P31) .............. 26
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Input ports (Ports P40–P46, P63, P64) ......................................... 9
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APPLICATION
TV with a closed caption decoder
Output ports (Ports P32, P47, P5, P60–P62, P65–P67) ............. 16
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12 V withstand ports ..................................................................11
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LED drive ports ........................................................................... 2
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Serial I/O ............................................................ 8-bit ✕ 1 channel
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2
Multi-master I C-BUS interface ............................... 1 (2 systems)
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A-D converter (8-bit resolution) ................................... 4 channels
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PWM output circuit ........................................................... 8-bit ✕ 8
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Interrupt interval determination circuit ......................................... 1
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Power dissipation
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In high-speed mode .......................................................... 165mW
(at VCC = 5.5V, 8MHz oscillation frequency, CRT on, and Data
slicer on)
In low-speed mode .......................................................... 0.33mW
(at VCC = 5.5V, 32kHz oscillation frequency)
Data slicer
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RENESAS [ RENESAS TECHNOLOGY CORP ]
