The MC68HC705X32 microcomputer (MCU) is a member of Freescale's MC68HC05 family of low-cost single chip microcomputers. This 8-bit MCU contains an on-board controller area network module (MCAN), complete with interface circuitry, comprising output drivers, input comparators and a V DD /2 generator. In addition, the device contains an on-chip oscillator, CPU, RAM, ROM, EEPROM, A/D converter, pulse length modulated outputs, I/O, serial communications interface, programmable timer system and watchdog. The fully static design allows operation at frequencies down to dc, reducing power consumption to a few micro-amps. View Block Diagram
Features
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On chip crystal oscillator with divide-by -2, -4, -8 or -10, or a software selectable divide-by -32, -64, -128 or -160 option (SLOW mode)
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31232 bytes of user EPROM plus 16 bytes of user vectors
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528 bytes of RAM
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654 bytes of bootstrap ROM
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256 bytes of byte erasable EEPROM with internal charge pump and security bit
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Write/erase protect bit for 224 of the 256 bytes EEPROM
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Bootstrap firmware
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Power saving STOP, WAIT and SLOW modes
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Three 8-bit parallel I/O ports and one 8-bit input-only port; wired-OR interrupt capability on all port B pins