INTRODUCTION
The DMC73C168 is an 8-Bit microcontroller that contains Prescaler, PLL Frequency Synthesizer and 2 channel A/D converter for Digital Tuning System.
The device is provided with abundant I/O ports and 2 channel serial interface ports (SI/O) controlled by powerful instruction. The package is 80-pin QFP and high performance CPU and internal peripheral allow flexible and easy system design in car-stereo, radio tuner and Hi-Fi audio system.

Key Features
■ CMOS Technology
■ Memory Configuration
    ● 256 Byte On-Chip RAM Register file plus 128 Byte Peripheral Free RAM
    ● Memory-Mapped Ports for Easy Addressing
    ● 16K-Byte On-Chip ROM
■ On-Chip PLL Frequency Synthesizer with Dual Modules Prescaler
    ● Independant Frequency input ports : Max 150MHz at FM, 40MHz at AM
    ● Two Types of Frequency Dividing Method : Pulse Swallow and Direct
    ● 8 Kinds of reference Frequencies : 1, 5, 6.25, 9, 10, 12.5, 25 and 50KHz
■ 2 Channel SIO port
■ 2 Channel On-Chip Timer
    ● 16-Bit with 5-Bit Prescaler and 16-Bit capture latch, timer outputs
    ● Internal interrupt with Automatic timer Reload
■ On-Chip A/D Converter
    ● 2-channels with 8 bit resolution
    ● Ratiometric Conversion
    ● 144 Machine-Cycles Conversion time (64us)
■ On-Chip IF Counter
    ● 17-Bit, Gate Time : Program can select from 1ms to 15ms
    ● maximum Input Frequency : FM IF = 20MHz, AM IF = 5MHz
■ Easy Interrupt Handling
    ● External Interrupts with Schmitt-Trigger Input
    ● Software Calls through Interrupt Vectors
    ● Software Monitoring of Interrupt Status
    ● Precise Interrupt Timing through Capture Latch
■ Selectable Beep clock : 417Hz, 1KHz, 1.25KHz, 2.5KHz
■ 64 I/O Pins
    ● 64 Bidirectional Pins
■ Wide Operating Range
    ● Voltage(VDD) : 5V ¡ 10% ¾
    ● Clock : 4.5MHz
    ● Temperature : -40 deg to 85 deg
    ● One Machine Execution Time : 0.44us (with 4.5MHz Crystal Oscillator)
■ Low operating Current
    ● Halt Mode for Power Savings (Typical : 1uA at OSC stop)
    ● Warm-up mode for avoid unstable osc operation at the wake time from Halt mode.
    The warm-up time can be adjustable by S/W.
■ Package
    ● 80 QFP (Quad Flat Package)
■ Development Support
    ● Evaluation Module : EVM73C00A & ADP73C168
    ● Assembler/Linker Cross Support for Popular Hosts