DESCRIPTION
The 4250 Group is a 4-bit single-chip microcomputer designed with CMOS technology. Its CPU is that of the 720 series using a simple instruction set. The computer is equipped with one 8-bit timer which has a reload register and the interrupt function. The various microcomputers in the 4250 Group include variations of the built-in memory type as shown in the table below.

FEATURES
• Minimum instruction execution time ............................. 1.0 µs
   (at 4.0 MHz system clock frequency, VDD=4.5 V to 5.5 V)
• Supply voltage
   4.5 V to 5.5 V (at 4.0 MHz system clock frequency)
   2.5 V to 5.5 V (at 1.0 MHz system clock frequency)
   2.2 V to 5.5 V (at 1.0 MHz system clock frequency:
   only for Mask ROM version)
• Timer
   Timer 1 ................................ 8-bit timer with a reload register
• Interrupt ................................................................... 2 sources
• CR oscillation circuit (Capacitor and Resistor connected externally)
• Logic operation instruction
• RAM back-up function
• Key-on wakeup function (ports G and S, INT pin)

APPLICATION
   Electric household appliances, consumer electronics products (mouse, etc.)