DESCRIPTION
   The 4524 Group is a 4-bit single-chip microcomputer designed with CMOS technology. Its CPU is that of the 4500 series using a simple, high-speed instruction set. The computer is equipped with main clock selection function, serial I/O, four 8-bit timers (each timer has one or two reload registers), 10-bit A/D converter, interrupts, and LCD control circuit.
   The various microcomputers in the 4524 Group include variations of the built-in memory size as shown in the table below.

FEATURES
● Minimum instruction execution time .................................. 0.5 µs
   (at 6 MHz oscillation frequency, in high-speed through-mode)
● Supply voltage
   Mask ROM version ...................................................... 2.0 to 5.5 V
   One Time PROM version ............................................. 2.5 to 5.5 V
   (It depends on oscillation frequency and operation mode)
● Timers
   Timer 1 ...................................... 8-bit timer with a reload register
   Timer 2 ...................................... 8-bit timer with a reload register
   Timer 3 ...................................... 8-bit timer with a reload register
   Timer 4 ................................. 8-bit timer with two reload registers
   Timer 5 .............................. 16-bit timer (fixed dividing frequency)
● Interrupt ........................................................................ 9 sources
● Key-on wakeup function pins ................................................... 10
●  LCD control circuit
   Segment output ........................................................................ 20
   Common output .......................................................................... 4
● Serial I/O......................................................................... 8-bit ✕ 1
● A/D converter ..............10-bit successive approximation method
● Voltage drop detection circuit (Reset) .........................Typ. 3.5 V
● Watchdog timer
● Clock generating circuit
   Main clock
   (ceramic resonator/RC oscillation/on-chip oscillator)
   Sub-clock
   (quartz-crystal oscillation)
● LED drive directly enabled (port D)

APPLICATION
   Household appliance, consumer electronics, office automation equipment