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