4282

      The 4282 Group is SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER.It has some descriptions.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 and an 8-bit timer which can be used to auto-control and has a reload register.
      The 4282 has many features.The number of basic instructions is 68.The minimum instruction execution time is 8.0 s.The supply voltage is 1.8 V to 3.6 V.The subroutine nesting is 4 levels.The timer 1 of 4282 is 8-bit timer.This has a reload register and carrier wave output auto-control function.The timer 2 is 8-bit timer.This has two reload registers and carrier wave output function.The logic operation function (XOR, OR, AND).The RAM back-up function.The key-on wakeup function (ports D4D7, E0E2, G0G3) is 11.The I/O port (ports D, E, G, CARR) is 16.The oscillation circuit of 4282 is ceramic resonance.The watchdog timer.The power-on reset circuit.The voltage drop detection circuit is typical:1.50 V.
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