3
8Bit Single Chip Microcontroller
DMC73C168
1. INTRODUCTION
The DMC73C168 is an 8-Bit microcontroller that contains Prescaler, PLL Frequency Synthesizer
and 2 channel A/D conv erter 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 hi gh performance CPU and internal peripheral
allow flexible and easy system design in car-stereo, radio tuner and Hi-Fi audio system.
1.1
Key Features
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CMOS Technology
Memory Configuration
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256 Byte On-Chip RAM Register file plus 128 Byte Peripheral Free RAM
Memory-Mapped Ports for Easy Addressing
16K-Byte On-Chip ROM
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
On-Chip PLL Frequency Synthesizer with Dual Modules Prescaler
2 Channel SIO port
2 Channel On-Chip Timer
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16-Bit with 5-Bit Prescaler and 16-Bit capture latch, timer outputs
Internal interrupt with Automatic timer Reload
2-channels with 8 bit resolution
Ratiometric Conversion
144 Machine-Cycles Conversion time (64us)
17-Bit, Gate Time : Program can select from 1ms to 15ms
maximum Input Frequency : FM IF = 20MHz, AM IF = 5MHz
External Interrupts with Schmitt-Trigger Input
Software Calls through Interrupt Vectors
Software Monitoring of Interrupt Status
Precise Interrupt Timing through Capture Latch
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On-Chip A/D Converter
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On-Chip IF Counter
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Easy Interrupt Handling
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Selectable Beep clock : 417Hz, 1KHz, 1.25KHz, 2.5KHz
64 I/O Pins
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64 Bidirectional Pins
Voltage(VDD) : 5V
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10%
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W ide Operating Range
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