Datasheet

MC68HC908GR16 Data Sheet, Rev. 5.0
Freescale Semiconductor 19
Chapter 1
General Description
1.1 Introduction
The MC68HC908GR16 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
For convenience, features have been organized to reflect:
• Standard features of the MC68HC908GR16
• Features of the CPU08
1.2.1 Standard Features of the MC68HC908GR16
Features of the MC68HC908GR16 include:
• High-performance M68HC08 architecture optimized for C-compilers
• Fully upward-compatible object code with M6805, M146805, and M68HC05 Families
• 8-MHz internal bus frequency
• Clock generation module supporting 32-kHz to 100-kHz crystals
• FLASH program memory security
(1)
• On-chip programming firmware for use with host personal computer which does not require high
voltage for entry
• In-system programming (ISP)
• System protection features:
– Optional computer operating properly (COP) reset
– Low-voltage detection with optional reset and selectable trip points for 3.3-V and 5.0-V
operation
– Illegal opcode detection with reset
– Illegal address detection with reset
• Low-power design; fully static with stop and wait modes
• Standard low-power modes of operation:
– Wait mode
– Stop mode
• Master reset pin and power-on reset (POR)
• 16 Kbytes of on-chip 100k cycle write/erase capable FLASH memory
1. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or copying the FLASH difficult for
unauthorized users.