DESCRIPTION
The 4282 Group enables fabrication of 8 × 7 key matrix and has the followin timers;
• an 8-bit timer which can be used to set each carrier wave and has two reload register
• an 8-bit timer which can be used to auto-control and has a reload register.

FEATURES
• Number of basic instructions ............................................. 68
• Minimum instruction execution time ............................ 8.0 µs
   (at f(XIN) = 4.0 MHz, system clock = f(XIN)/8)
• Supply voltage ................................................. 1.8 V to 3.6 V
• Subroutine nesting ..................................................... 4 levels
• Timer
   Timer 1 ................................................................... 8-bit timer
   (This has a reload register and carrier wave output auto-control
   function)
   Timer 2 ................................................................... 8-bit timer
   (This has two reload registers and carrier wave output function)
• Logic operation function (XOR, OR, AND)
• RAM back-up function
• Key-on wakeup function (ports D4–D7, E0–E2, G0–G3) .... 11
• I/O port (ports D, E, G, CARR) .......................................... 16
• Oscillation circuit ..................................... Ceramic resonance
• Watchdog timer
• Power-on reset circuit
• Voltage drop detection circuit ......................... Typical:1.50 V
   (system reset)

APPLICATION
   Various remote control transmitters