Features of the MC68HC08AS20 include:
• High-Performance M68HC08 Architecture
• Fully Upward-Compatible Object Code with M6805, M146805,
and M68HC05 Families
• 8.4-MHz Internal Bus Frequency
• 20,480 Bytes of Read-Only Memory (ROM)
• ROM Data Security
• 512 Bytes of On-Chip Electrically Erasable Programmable
Read-Only Memory (EEPROM)
• 640 Bytes of On-Chip RAM
• Serial Peripheral Interface Module (SPI)
• Serial Communications Interface Module (SCI)
• 16-Bit, 6-Channel Timer Interface Module (TIM)
• Clock Generator Module (CGM)
• 8-Bit, 15-Channel Analog-to-Digital Converter Module (ADC)
• SAE J1850 Byte Data Link Controller Digital Module (BDLC–D)
• System Protection Features
– Computer Operating Properly (COP) with Optional Reset
– Low-Voltage Detection with Optional Reset
– Illegal Opcode Detection with Optional Reset
– Illegal Address Detection with Optional Reset
• Low-Power Design (Fully Static with Stop and Wait Modes)
• Master Reset Pin and Power-On Reset
Features of the CPU08 include:
• Enhanced HC05 Programming Model
• Extensive Loop Control Functions
• 16 Addressing Modes (Eight More Than the HC05)
• 16-Bit Index Register and Stack Pointer
• Memory-to-Memory Data Transfers
• Fast 8 × 8 Multiply Instruction
• Fast 16/8 Divide Instruction
• Binary-Coded Decimal (BCD) Instructions
• Optimization for Controller Applications
• C Language Support