The MC68HC705X32 microcomputer (MCU) is a member of Motorola'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.

• Fully static design featuring the industry standard M68HC05 family CPU core
• 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)
• 31232 bytes of user EPROM plus 16 bytes of user vectors
• 528 bytes of RAM
• 654 bytes of bootstrap ROM
• 256 bytes of byte erasable EEPROM with internal charge pump and security bit
• Write/erase protect bit for 224 of the 256 bytes EEPROM
• Bootstrap firmware
• Power saving STOP, WAIT and SLOW modes
• Three 8-bit parallel I/O ports and one 8-bit input-only port; wired-OR interrupt capability on all port B pins
• Motorola controller area network (MCAN) with line interface circuitry
• Software option available to output the internal E-clock to port pin PC2
• 16-bit timer with 2 input captures and 2 output compares
• Computer operating properly (COP) watchdog timer
• Serial communications interface system (SCI) with independent transmitter/receiver baud rate selection; receiver wake-up function for use in multi-receiver systems
• 8 channel A/D converter
• 2 pulse length modulation systems which can be used as D/A converters
• One interrupt request input plus 4 on-board hardware interrupt sources
• Available in 64-pin QFP package