MC68HC908AS32A Datasheet, PDF (19/280 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 1
General Description
1.1 Introduction
The MC68HC908AS32A is a member 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.
1.2 Features
Features include:
• High-performance M68HC08 architecture
• Fully upward-compatible object code with M6805, M146805, and M68HC05 Families
• 8.4 MHz internal bus frequency
• 32,256 bytes of FLASH electrically erasable read-only memory (FLASH)
• FLASH data security⁽¹⁾
• 512 bytes of on-chip electrically erasable programmable read-only memory with security option
(EEPROM)⁽¹⁾
• 1 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)
• 16-bit, 6-channel timer interface module (TIM)
• 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
• SAE J1850 byte data link controller digital module
1. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or copying the FLASH and
EEPROM difficult for unauthorized users.
MC68HC908AS32A Data Sheet, Rev. 2.0
Freescale Semiconductor
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