Datasheet

MC68HC908GP32 Data Sheet, Rev. 10
Freescale Semiconductor 21
Chapter 1
General Description
1.1 Introduction
The MC68HC908GP32 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 MC68HC908GP32
• Features of the CPU08
1.2.1 Standard Features of the MC68HC908GP32
• High-performance M68HC08 architecture optimized for C-compilers
• Fully upward-compatible object code with M6805, M146805, and M68HC05 Families
• 8-MHz internal bus frequency
• 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
• System protection features:
– Optional computer operating properly (COP) reset
– Low-voltage detection with optional reset and selectable trip points for 3.0-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)
• 32 Kbytes of on-chip FLASH memory with in-circuit programming capabilities of FLASH program
memory
• 512 bytes of on-chip random-access memory (RAM)
• Serial peripheral interface module (SPI)
• Serial communications interface module (SCI)
1. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or copying the FLASH difficult for
unauthorized users.