General Description
Introduction
The MC68HC908AS60A and MC68HC908AZ60A are members of the low-cost, high-performance M68HC08 Family of 8-bit microcontroller units (MCUs). The M68HC08 Family is based on the customer-specified integrated circuit (CSIC) design strategy. All MCUs in the family use the enhanced M68HC08 central processor unit (CPU08) and are available with a variety of modules, memory sizes and types, and package types.
These parts are designed to emulate the MC68HC08ASxx and MC68HC08AZxx automotive families and may offer extra features which are not available on those devices. It is the user’s responsibility to ensure compatibility between the features used on the MC68HC908AS60A and MC68HC908AZ60A and those which are available on the device which will ultimately be used in the application.

FEATUREs
Features of the MC68HC908AS60A and MC68HC908AZ60A include:
• High-Performance M68HC08 Architecture
• Fully Upward-Compatible Object Code with M6805, M146805, and M68HC05 Families
• 8.4 MHz Internal Bus Frequency
• 60 Kbytes of FLASH Electrically Erasable Read-Only Memory (FLASH)
• FLASH Data Security
• 1 Kbyte of On-Chip Electrically Erasable Programmable Read Only Memory with Security Option (EEPROM)
• 2 Kbyte of On-Chip RAM
• Clock Generator Module (CGM)
• Serial Peripheral Interface Module (SPI)
• Serial Communications Interface Module (SCI)
• 8-Bit, 15-Channel Analog-to-Digital Converter (ADC-15)
• 16-Bit, 6-Channel Timer Interface Module (TIMA-6)
• Programmable Interrupt Timer (PIT)
• 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
• 16-Bit, 2-Channel Timer Interface Module (TIMB) (AZ only)
• 5-Bit Keyboard Interrupt Module (64-Pin QFP only)
• MSCAN Controller (Motorola Scalable CAN) implements CAN 2.0b Protocol as Defined in BOSCH Specification September 1991 (AZ only)
• SAE J1850 Byte Data Link Controller Digital Module (AS only)

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