Chapter 1
General Description
1.1 Introduction
The MC68HC908AS60A, MC68HC908AZ60A, (MC68HC908AZ60ACFU)and MC68HC908AZ60E are members of the low-cost,
high-performance M68HC08 Family of 8-bit microcontroller units (MCUs). 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. (MC68HC908AZ60ACFU)It is the user’s responsibility to ensurecompatibility between the features used on the MC68HC908AS60A, MC68HC908AZ60A, and
MC68HC908AZ60E and those which are available on the device which will ultimately be used in the application.
For detailed information regarding the (MC68HC908AZ60ACFU)MC68HC908AZ60E refer to Appendix B MC68HC908AZ60E.
1.2 Features
Features of the MC68HC908AS60A (MC68HC908AZ60ACFU)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 (MC68HC908AZ60ACFU) 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, (MC68HC908AZ60ACFU)6-Channel Timer Interface Module (TIMA-6)
Programmable Interrupt Timer (PIT)
System Protection Features
Computer (MC68HC908AZ60ACFU)Operating Properly (COP) with Optional Reset
Low-Voltage Detection with Optional Reset
Illegal Opcode Detection with Optional Reset
Illegal Address Detection (MC68HC908AZ60ACFU)with Optional Reset
Low-Power Design (Fully Static with Stop and Wait Modes)
MC68HC908AZ60A • MC68HC908AS60A • MC68HC908AS60E Data Sheet, Rev. 6
General Description
MC68HC908AZ60A • (MC68HC908AZ60ACFU) MC68HC908AS60A • MC68HC908AS60E Data Sheet, Rev. 6
22
Freescale Semiconductor
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 Implements (MC68HC908AZ60ACFU) CAN 2.0b Protocol as Defined in BOSCH Specification September
1991 (AZ only)
SAE J1850 Byte Data Link (MC68HC908AZ60ACFU)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 (MC68HC908AZ60ACFU) 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 (MC68HC908AZ60ACFU) Support
1.3 MCU Block Diagram
Figure 1-1 shows the structure of the MC68HC908AZ60A.
Figure 1-2 shows the structure of the MC68HC908AS60A.
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