DESCRIPTION
The M37224M3-XXXSP is a single-chip microcomputer designed with CMOS silicon gate technology. They are housed in a 42-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 programming.
The M37224M3-XXXSP has a PWM output function and a OSD display function, so it is useful for a channel selection system for TV.

FEATURES
• Number of basic instructions ..................................................... 71
• Memory size
   ROM ....................................................... 12 K bytes
   RAM ..........................................................256 bytes
   ROM for display ........................................ 8 K bytes
   RAM for display .......................................... 96 bytes
• Minimum instruction execution time
   ......................................... 0.5 µs (at 8 MHz oscillation frequency)
• Power source voltage................................................... 5 V ± 10 %
• Power dissipation ............................................................. 165 mW
   (at 8 MHz oscillation frequency, VCC=5.5V, at CRT display)
• Subroutine nesting ....................................... 96 levels (maximum)
• Interrupts ....................................................... 13 types, 13 vectors
• 8-bit timers .................................................................................. 4
• Programmable I/O ports (Ports P0, P1, P2, P30–P32) .............. 27
• Input ports (Ports P33, P34) ........................................................ 2
• Output ports (Ports P52–P55)...................................................... 4
• 12 V withstand ports.................................................................... 6
• LED drive ports ........................................................................... 4
• Serial I/O ............................................................ 8-bit ✕ 1 channel
• A-D comparator (6-bit resolution) ................................. 6 channels
• D-A converter (6-bit resolution) ................................................... 2
• PWM output circuit ......................................... 14-bit ✕ 1, 8-bit ✕ 6
• ROM correction function ........................................... 32 bytes ✕ 2
• CRT display function
   Number of display characters................ 20 characters ✕ 2 lines
      (16 lines maximum)
   Kinds of characters ..................................................... 128 kinds
   Dot structure ........................................................... 12 ✕ 16 dots
   Kinds of character sizes .................................................. 3 kinds
   Kinds of character colors (It can be specified by the character)
      maximum 7 kinds (R, G, B)
   Kinds of raster colors (maximum 7 kinds)
   Display position
      Horizontal .................................................................. 64 levels
      Vertical .................................................................... 128 levels
   Bordering (horizontal and vertical)

APPLICATION
   TV