MITSUBISHI MICROCOMPUTERS
M37280MF–XXXSP, M37280MK–XXXSP
M37280EKSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
1. DESCRIPTION
●Closed caption data slicer
The M37280MF–XXXSP and M37280MK-XXXSP are single-chip
microcomputers designed with CMOS silicon gate technology. They
have a OSD function and a data slicer function, so it is useful for a
channel selection system for TV with a closed caption decoder.
The feautures of the M37280EKSP is similar to those of the
M37280MK-XXXSP except that the chip has a built-in PROM which
can be written electrically. The difference between M37280MK-XXXSP
and M37280MF-XXXSP are the ROM size and RAM size. Accord-
ingly, the following descriptions will be for the M37280MK-XXXSP.
●OSD function
Display characters .... 32 characters ✕ 16 lines + RAM font (1 character)
(CC/OSD mode)(CDOSD mode)(RAM font)
Kinds of characters ......... 510 kinds
+ 62 kinds + 1 kind
(Coloring unit) (a character) (a dot) (a dot)
Triple layer function.......................................................................
2 layers selected from CC/CDOSD/OSD mode + RAM font layer
Character display area .............. CC/CDOSD mode: 16 ✕ 26 dots
OSD mode/RAM font: 16 ✕ 20 dots
Kinds of character sizes.................... CC mode/RAM font: 4 kinds
OSD/CDOSD mode: 14 kinds
2. FEATURES
●Number of basic instructions .................................................... 71
Kinds of character colors ..............................................................
64 colors (4 adjustment levels for each R, G, B)
Coloring unit............ dot, character, character background, raster
Blanking output OUT1, OUT2
●Memory size
ROM ..................... 60K bytes (M37280MF-XXXSP)
80K bytes (M37280MK-XXXSP,
Display position
M37280EKSP)
Horizontal: 256 levels
(RAM font can be set independently)
Vertical :1024 levels
RAM ..................... 1024 bytes (M37280MF-XXXSP)
1472 bytes (M37280MK-XXXSP,
Attribute ........................................................................................
CC mode: smooth italic, underline, flash, automatic solid space
OSD mode: border, shadow
M37280EKSP)
ROM correction memory ............................ 64 bytes
●Minimum instruction execution time
Window/Blank function
......................................... 0.5 µs (at 8 MHz oscillation frequency)
●Power source voltage ................................................. 5 V ± 10 %
●Subroutine nesting ............................................. 128 levels (Max.)
●Interrupts ....................................................... 19 types, 16 vectors
●8-bit timers .................................................................................. 6
●Programmable I/O ports (Ports P0, P1, P2, P30, P31) ............. 26
●Input ports (Ports P40–P46, P63, P64, P70–P72) ...................... 12
●Output ports (Ports P32, P47, P5, P60–P62, P65–P67) .............. 16
●12 V withstand ports ................................................................... 8
●LED drive ports ........................................................................... 2
●Serial I/O ............................................................8-bit ✕ 1 channel
3. APPLICATION
TV with a closed caption decoder
4. PIN CONFIGURATION
Refer to page 3.
5. BLOCK DIAGRAM
Refer to page 4.
6. PERFORMANCE OVERVIEW
Refer to pages 5 and 6.
2
●Multi-master I C-BUS interface .............................. 1 (2 systems)
●A-D converter (8-bit resolution) ....................................8 channels
●PWM output circuit ......................................................... 8-bit ✕ 8
●Power dissipation
7. PIN DESCRIPTION
Refer to pages 7 to 11.
In high-speed mode ......................................................... 165 mW
(at VCC = 5.5V, 8 MHz oscillation frequency, CRT on, and Data
slicer on)
In low-speed mode ......................................................... 0.33 mW
(at VCC = 5.5V, 32 kHz oscillation frequency)
●ROM correction function
Rev. 1.0