Notes on the 68HC12

Documentation

From Motorola

• 68HC12 Overview
• Technical Summary - 600 KB PDF file describing electrical interface
• Reference Manual - 3.5 Mb PDF file describing assembly language 
  • Short reference guide to opcodes
• Tutorial: HTML from Motorola website and PDF
• Glossary 

Background

• An Overview of the 68HC12 from the Seattle Robotics Society

Development Tools

• LAUTERBACH - TRACE32 BDM Debugger for 68HC12 family
• P&E Microcomputer Systems makes debuggers and boards. Has a large discount for academic users.
• Background Debug Mode (DBM) 
  • NoICE Remote Debugger is shareware and has a version  for  HC12

Simulators

• CPU12 Simulator Package from Steve Hawkinson, Ben Marzinski and Jason Wachholz 
• Simulator for Motorola 68HC12 from Tom Almy

Boards

• Seattle Robotics Society has a 68HC812A4 Development Board supplied by Kevin Ross. You can purchase bare boards and kits for the HC12.
• Technological Arts - HC11 & HC12 Evaluation & Prototyping Tools
• Elektronikladen Mikrocomputer GmbH (German) - you can buy purchase their hardware boards from ImageCraft  (prices are current as of 2/1/00)
  • HC12compact (English) 
    • HC12 Compact Kit 1- $240.00 - HC12A4 w/512K Flash, 256K RAM 
    •  HC12 Compact Kit 2 - $340.00 - Full kit = Basic kit plus RTC, CAN,  external ADC and DAC
• HC12 Welcome Kit - looks like a nice board to use on robots. $155.00 - 60K bytes Flash memory.
• Card12.D60 - has an ICAN interface
• RAM.Bo32 - RAM Board for the 912B32 EVB - the912B32 is a Motorola evaluation board with no external memory. This little add on board adds 32K of RAM($55.00).

• From Axiom
  • Specifications for CME12B32 Development Board
  • utl12.zip - axiom utilities for the CME12B32
    • as12 assembler description
    • Floppy contents - DOS based utilities for the CME12B32 probably the same as the above file.
  • ax12w - a MS Windows based interface program to the Axiom development board.
  • Klcd_drv.zip - keypad and LCD routines
  • LCD interfacing
    • A bad scan of the manufacture specification
    • electrical spec of 20x4 LCD
    • Hitachi HD44789U LCD Controller
    • From Motorola Interfacing the MC68HC912B32 to an LCD Module

Cross Assemblers

• ASxxxx Cross assemblers asv2p2.exe - shareware
• The Macro Assembler AS from Alfred Arnold
• as12 assembler - local copy

Cross Compilers

• ImageCraft Motorola Development Tools
  • ImageCraft Downloadable Files - includes a demo
• COSMIC 68HC12 Development Tools 
• HIWARE - At the Top of the Embedded Systems World(extensive but expensive and counterintuitive)
• GNU Development Chain for 68HC11&68HC12

Libraries

• GEL for 68HC11 and 68HC12

Links

• Oliver Thamm's HC12 Seite (in German)
• Todd Morton at Western Washington University- has sample code to use timer, ADC, etc.
• The 68HC12 Timer Module at the Seattle Robotics Society
• HC12 Compendium

Books

• Software and Hardware Engineering Motorola M68HC12