DESCRIPTION The M37225M6/M8/MA/MC–XXXSP are single-chip microcomputers designed with CMOS silicon gate technology. They have a OSD, I2C-BUS interface, PWM output, and 12 V withstand, so it is useful for a channel selection system for TV. The features of the M37225ECSP are similar to those of the M37225M6-XXXSP except that the chip has a built-in PROM which can be written electrically. The differences amang M37225M6/M8/MA/MC–XXXSP are the ROM, RAM size. Accordingly, the following descriptions will be for the M37225M6-XXXSP FEATURES ● Number of basic instructions .................................................... 71 ● Memory size ROM ......... 24K bytes (M37225M6-XXXSP) 32K bytes (M37225M8-XXXSP) 40K bytes (M37225MA–XXXSP) 48K bytes (M37225MC–XXXSP, M37225ECSP) RAM ......... 1024 bytes (M37225M6/M8-XXXSP) 2048 bytes (M37225MA/MC–XXXSP, M37225ECSP) (✽ ROM correction memory included) ● Minimum instruction execution time ......................................... 0.5 µs (at 8 MHz oscillation frequency) ● Power source voltage ................................................. 5 V ± 10 % ● Subroutine nesting ............................................. 128 levels (Max.) ● Interrupts ....................................................... 16 types, 16 vectors ● 8-bit timers .................................................................................. 4 ● Programmable I/O ports (Ports P0, P1, P2, P30–P32, P35) ..... 28 ● Input ports (Ports P33, P34, P50, P51) ........................................ 4 ● Output ports (Ports P52–P55) ..................................................... 4 ● 12 V withstand ports ................................................................... 6 ● LED drive ports ........................................................................... 4 ● Serial I/O ............................................................ 8-bit ✕ 1 channel ● Multi-master I2C-BUS interface .............................. 1 (2 systems) ● A-D converter (8-bit resolution) .................................... 8 channels ● PWM output circuit ........................................ 14-bit ✕ 2, 8-bit ✕ 6 ● Power dissipation In operating ...................................................................... 165 mW (at VCC = 5.5V, 8 MHz oscillation frequency, and OSD on) ● ROM correction function ................................................ 3 vectors ● Immediate return mode from wait state ● OSD function Display characters ............................................... 24 characters ✕ 2 lines (It is possible to display 3 lines or more by software) Kinds of characters ......... 381 kinds Character display area 16 ✕ 20 dots Kinds of character sizes .............................. Block display: 3 kinds SPRITE display: 1 kinds Kinds of character colors. ................................. 8 colors (R, G, B) Coloring unit ................... character, character background, raster Display position Horizontal: 64 levels Vertical :255 levels Attribute ........ Border (all-bordered, shadow-bordered), BUTTON SPRITE display function Wallpaper function Window function Corresponding to bi-scan mode APPLICATION TV
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