DESCRIPTION
The M37220M3-XXXSP is a single-chip microcomputer designed with CMOS silicon gate technology. It is 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 pro gramming.
The M37220M3-XXXSP has a PWM output function and a OSD dis play 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......................................... 4 K bytes
   RAM for display .......................................... 80 bytes
• The minimum instruction execution time ........................ 0.5µs (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
• CRT display function
  Number of display characters ................ 24 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