The 68HC705B32 offers EEPROM memory and more I/O including Analog to Digital Convertors (ADC), Pulse Width Modulators (PWM), and Serial Communications (SCI+).
View Block Diagram
Features
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68HC05 CPU
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32K bytes EPROM
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528 bytes RAM
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256 bytes of Byte Eraseable EEPROM
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Timer System
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16-bit Timer with Two Input Captures and Two Output Compare
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Two Pulse Width Modulation Channels can be used as D/A Converters
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Computer Operating Properly Watchdog Timer
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8 Channel Analog to Digital Converter (ADC)
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24 Bidirectional I/O Lines and 8 Input Only Lines
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On-Chip Oscillator with Crystal/Ceramic Resonator
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Serial Communications
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Asynchronous Serial Communications Interface with Synchronous Master Transmit Capability (SCI+)