M34556G8FP Datasheet | Renesas

4556 Group SINGLE-CHIP 4-BIT CMOS MICROPUTER REJ03B0025-0302 Rev.3.02 DESCRIPTION The 4556 Group is a 4-bit single-chip microputer designed with CMOS technology. Its CPU is that of the 4500 series using a simple, high-speed instruction set. The puter is equipped with two 8-bit timers (each timer has one or two reload registers), a 16bit timer for clock count, interrupts, and oscillation circuit switch function. The various microputers in the 4556 Group include variations of the built-in memory size as shown in the table below. Features q Minimum instruction execution time Mask ROM version .............................................................. 0.5 µs (at 6 MHz oscillation frequency, in high-speed through-mode) One Time PROM version ................................................... 0.68 µs (at 4.4 MHz oscillation frequency, in high-speed through-mode) q Supply voltage Mask ROM version ...................................................... 1.8 to 5.5 V One Time PROM version ............................................. 1.8 to 3.6 V (It depends on operation source clock, oscillation frequency and operation mode) q Timers Timer 1 ...................................... 8-bit timer with a reload register Timer 2 ................................. 8-bit timer with two reload registers Timer 3 .............................. 16-bit timer (fixed dividing frequency) q Interrupt ........................................................................ 4 sources q Key-on wakeup function pins ..................................................... 9 q LCD control circuit Segment output ........................................................................ 23 mon output .......................................................................... 4 q Voltage drop detection circuit (only H version) Reset occurrence .................................... Typ. 1.8 V (Ta = 25 °C) Reset release .......................................... Typ. 1.9 V (Ta = 25...