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455A Datasheet(PDF) 1 Page - Renesas Technology Corp |
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455A Datasheet(HTML) 1 Page - Renesas Technology Corp |
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1 / 148 page  Rev.1.01 Feb 15, 2008 Page 1 of 146 REJ03B0224-0101 DESCRIPTION The 455A 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 two 8-bit timers (each timer has one or two reload registers), a 16-bit timer for clock count, interrupts, and oscillation circuit switch function. The various microcomputers in the 455A Group include variations of type 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 .......................................................1.8 to 5.5 V (It depends on operation source clock, oscillation frequency and operation mode) •Timers Timer 1 ..............................................................8-bit timer with a reload register and carrier wave output auto-control function Timer 2 ............................. 8-bit timer with two reload registers and carrier wave generation circuit Timer 3 ........................ 16-bit timer (fixed dividing frequency) • Interrupt ..................................................................... 4 sources • Key-on wakeup function pins .............................................. 24 • I/O ports ............................................................................... 24 • Output ports ........................................................................... 1 • LCD control circuit Segment output ..................................................................... 32 Common output ...................................................................... 4 • Voltage drop detection circuit Reset occurrence.................................. Typ. 1.7 V (Ta = 25 °C) Reset release ........................................ Typ. 1.8 V (Ta = 25 °C) Skip occurrence ................................... Typ. 2.0 V (Ta = 25 °C) • Power-on reset circuit • Watchdog timer • Clock generating circuit Built-in clock (high-speed/low-speed on-chip oscillator) Main clock (ceramic resonator) Sub-clock (quartz-crystal oscillation) • LED drive directly enabled (port D) APPLICATION Remote control transmitter Note1.Shipped in blank Table 1 Support Product Part number ROM size ( × 10 bits) RAM size ( × 4 bits) Package ROM type M3455AG8FP (Note 1) 8192 words 512 words PLQP0052JA-A QzROM M3455AG8-XXXFP M3455AGCFP (Note 1) 12288 words M3455AGC-XXXFP 455A Group SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER REJ03B0224-0101 Rev.1.01 Feb 15, 2008 |
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