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PDF M37274MA-xxxSP Data sheet ( Hoja de datos )
| Número de pieza | M37274MA-xxxSP | |
| Descripción | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER | |
| Fabricantes | Mitsubishi | |
| Logotipo |  |
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MITSUBISHI MICROCOMPUTERS
PRELIMINARY M37274MA-XXXSPNSootimcee: pTahriasmisennotitcalimfinitasl asrpeecsiufibcjaetciotnto. change.
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
DESCRIPTION
The M37274MA-XXXSP is a single-chip microcomputer designed with
CMOS silicon gate technology. It is housed in a 52-pin shrink plastic
molded DIP.
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.
The M37274MA-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.
FEATURES
• Number of basic instructions ..................................................... 71
• Memory size
ROM ....................................................... 40 K bytes
RAM ..........................................................768 bytes
ROM correction memory ............................. 64 bytes
ROM for OSD ....................................... 11072 bytes
RAM for OSD .......................................... 1296 bytes
• Minimum instruction execution time
......................................... 0.5 µs (at 8 MHz oscillation frequency)
• Power source voltage ................................................... 5 V ± 10 %
• Subroutine nesting ............................................. 128 levels (Max.)
• Interrupts ....................................................... 18 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 P52–P55) ...................................................... 4
• 12 V withstand ports .................................................................... 7
• LED drive ports ........................................................................... 2
• Serial I/O ............................................................ 8-bit ! 1 channel
• Multi-master I2C-BUS interface ................................1 (2 systems)
• A-D converter (8-bit resolution) .................................... 4 channels
• PWM output circuit ......................................... 14-bit ! 1, 8-bit ! 7
• Power dissipation
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
• ROM correction function
• OSD function
Display characters ............................... 36 characters ! 12 lines
Kinds of characters ...................................................... 256 kinds
(In EXOSD mode, they can be combined with 16 kinds of extra
fonts)
Character display area ........................ CC mode : 16 ! 26 dots
OSD mode : 16 ! 20 dots
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 : 7 kinds (R, G, B)
EXOSD mode : 5 kinds (R, G, B)
Display position
Horizontal ................................................................ 256 levels
Vertical .................................................................. 1024 levels
Attribute ...................... CC mode : smooth italic, underline, flash
OSD mode : border
EXOSD mode : border,
extra font (16 kinds)
Automatic solid space function
Window function
Dual layer OSD function
APPLICATION
TV with a closed caption decoder
1 page  
PRELIMINARYNSootimcee: pTahriasmisennotitcalimfinitasl asrpeecsiufibcjaetciot nto. change.
MITSUBISHI MICROCOMPUTERS
M37274MA-XXXSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
FUNCTIONS (continued)
OSD function
Parameter
Number of display characters
Character display area
Functions
36 characters ! 12 lines
CC mode: 16 ! 26 dots (dot structure: 16 ! 20 dots)
OSD mode: 16 ! 20 dots
EXOSD mode: 16 ! 26 dots
Kinds of characters
256 kinds
(In EXOSDmode, they can be combined with 16 kinds of extra fonts)
Kinds of character sizes
CC mode: 2 kinds
OSD mode: 14 kinds
EXOSD mode: 6 kinds
Kinds of character colors
CC mode: 7 kinds (R, G, B)
OSD mode: 7 kinds (R, G, B)
EXOSD mode: 5 kinds (R, G, B)
Display position (horizontal, vertical) 256 levels (horizontal) ! 1024 levels (vertical)
Power source voltage
Power dissipation In high-speed
mode
In low-speed
mode
OSD ON Data slicer ON
OSD OFF Data slicer OFF
OSD OFF Data slicer OFF
5 V ± 10 %
165 mW typ. (at oscillation frequency f(XIN) = 8 MHz, fOSC = 13 MHz)
82.5 mW typ. (at oscillation frequency f(XIN) = 8 MHz)
0.33mW typ. (at oscillation frequency f(XCIN) = 32 kHz, f(XIN) = stopped)
In stop mode
0.055 mW (maximum)
Operating temperature range
–10 °C to 70 °C
Device structure
CMOS silicon gate process
Package
52-pin shrink plastic molded DIP
5
5 Page 
PRELIMINARYNSootimcee: pTahriasmisennotitcalimfinitasl asrpeecsiufibcjaetciot nto. change.
MITSUBISHI MICROCOMPUTERS
M37274MA-XXXSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
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.
ROM Correction Memory (RAM)
This is used as the program area for ROM correction.
000016
RAM
(768 bytes)
00C016
00FF16
020016
024816
02C016
02FF16
030016
043F16
RAM for OSD (Note)
(1296 bytes)
080016
0DF316
600016
SFR1 area
SFR2 area
Not used
Not used
Not used
Zero page
1000016
1080016
ROM correction memory
Block 1 : addresses 02C0 16 to 02DF16
Block 2 : addresses 02E0 16 to 02FF16
155FF16
1800016
ROM for OSD
(11072 bytes)
Not used
Not used
ROM
(40 K bytes)
FF0016
FFDE16
FFFF16
Interrupt vector area
Special page
Fig. 4. Memory map
1E41F16
1FFFF16
Not used
Note : Refer to Table 15. Contents of OSD RAM.
11
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