Software for the 68HC08

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Here is a collection of HC08 software I've found useful.

The MC68HC08 is a object code compatibility with the 68HC05 with 78 new instructions, including eight additional addressing modes, a 16-bit index register and stack pointer, memory to memory data transfers, and BCD instructions.

The 68HC08 was announced in the early 1990's but it remained typical Motorola vaporware until around 1997 when the first products were released. Many pin, surface mounted, one-time programmable (OTP) devices were not very user friendly for hobbyist or small production users. But now they are available in low cost, low pin count, DIP package, FLASH memory devices.

PINS	DEVICE NAME	FEATURES
8	MC68HC908QT4	4K FLASH, TIM, No Crystal
16	MC68HC908QY4	4K FLASH, TIM, No Crystal
16	MC68HC908KX8	8K FLASH, SCI, TIM
20	MC68HC908JB8	8K FLASH, USB
20	MC68HC908JK3E	4K FLASH, TIM
20	MC68HC908JK8	8K FLASH, SCI, TIM
20	MC68HC908LB8	8K FLASH, Op-Amp, No Crystal
28	MC68HC908JL3E	4K FLASH, TIM
28	MC68HC908JL8	8K FLASH, SCI, TIM
28	MC68HC908JL16	16K FLASH, SCI, IIC, TIM
28	MC68HC908MR8	8K FLASH, SCI, TIM
28	MC68HC908GR8	8K FLASH, SCI, SPI, TIM
40	MC68HC908GP32	32K FLASH, SCI, SPI, 2 TIM
TIM is a 2-channel timer interface module with selectable input capture, output compare, and PWM on each channel. All of the above also have A/D.

NOTE: There is a serious flaw with the first (current?) mask set of MC68HC908Qxx with an output pin. Be sure to get the Errata from the Motorola Web Site.

Of course, the Freescale site is one of the first places to visit.

From Motorola get

for the MC68HC08.
From P&E Microcomputer Systems get the software to program the MC68HC908.
ImageCraft has a 30 day free demo of their 68HC908 C Compiler

how has some Motorola micros; do a search at their Website.

Mathpak is a 16 bit math package from an old HITACHI handbook slightly modified for the 68HC08.

L3 Systems offers its Pony Monitor for HC08 development. The Pony Monitor is written to reside with 4K of memory space and provide basic assembly debugging support and fast s-record downloads. There is also a mini-Pony written for the MC68HC908JB8.

The small world of HC08 is a wonderful site. MUST SEE

Spgmr08 is a Linux software package for programming devices in the Motorola MC68HC908 microcontroller family.

Here is a collection of sample code that was written by Samuel Ginsberg

Val Gretchev, who's MC68HC11 Emporium was a classic microcontroller site some years ago, has provided this project based on the MC68HC908GP32. Even if you don't want to reproduce this project in its entirety the very well written and commented assembly program is worth study. There are many routines that would be useful in your own work.

There is a new Series of Motorola MCU Reference Designs Passive Infra Red (PIR) Detection System USB-Based Sensor-Actuator Interface Digital Addressable Lighting Interface Radio Frequency Reference Design for Remote Keyless Entry. Many others.

Design Ideas that make use of MC68HC08 microcontrollers.

Indicator has "electronic lens" in the September 4, 2003 issue uses a 68HC908JK1
Build a simple one-chip phototimer in the July 7, 2004 issue uses a 68HC908QT2
Microcontroller protects dc motor in the February 17, 2005 issue uses a 68HC908QT2
Microprocessor, linear potentiometer deliver echo pulses in the May 12, 2005 issue uses a 68HC908QT2
Microprocessor-based dual timer features four outputs in the June 9, 2005 issue uses a 68HC908QY
Squeeze extra outputs from a pin-limited microcontroller in the August 4, 2005 issue uses a 68HC908QT1
Microprocessor's single-interrupt input processes multiple external interrupts in the March 2, 2006 issue uses a 68HC908QY2
Microcontroller simplifies battery-state-of-charge measurement in the April 27, 2006 issue uses a 68HC908QT2

at ELECTRONIC DESIGN use MC68HC08 microcontrollers.

Microcontroller Handles LED Brightness Control in the December 8, 2004 issue uses the MC68HC908QT2

The winners of Circuit Cellar's eleventh design contest, sponsored by Motorola. These projects were based on a Motorola 68HC908GPXX flash-based microcontroller, and all were judged on the following qualities: technical merit, originality, cost effectiveness, utility or application, and efficiency of development/design process.
MOTOROLA FLASH INNOVATION 2003 DESIGN CONTEST WINNERS
44 winners with full description and source code.

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This page written by Roger Schaefer. Last updated May 30, 2006