Note:Freescale Semiconductor was acquired by NXP Semiconductor in 2015. Many of the documents below still say Freescale, some may say NXP, and some older ones may still say Motorola, but the products are the same.

This information is about the Freescale microcontrollers that were used in EE459 for several years before we switched to primarily using ones from the Atmel ATmega family.

• MC908JL16
  • MC908JL16 Datasheet - Freescale's full datasheet on the MC908JL16 (also known as MC68HC908JL16) microcontroller (1.6MB)
  • To go to Freescale's web page for the MC908JL16 microcontroller, click here
  • MC908JL16 Notes - Notes on the Freescale MC908JL16 microcontroller hardware and software issues
  • CPU08 Programming Reference Manual - Programming manual for the MC68HC08 microcontroller family (2.7mb)
  • TIM08 Reference Manual - Manual for the internal timers in the MC68HC08 microcontroller family (1 mb)
  • JL16 I2C Notes - This page discusses some issues related to using the I2C (MMIIC) interface on the JL16 microcontroller.
  • Baud rate calculator for the JL16 microcontroller
  • ICS08JLKL Jumper Settings - Diagram of the proper jumper settings on the MC68ISC08JLJK development boards.
  • The following documents relate to the CodeWarrior software
    • C Compiler Notes - Using CodeWarrior for programming in C for HC08's.
    • Assembly Language Notes - Using CodeWarrior for programming in assembly language for HC08's.
    • JL16 Registers - Names of the JL16 registers and bits within the registers as used by CodeWarrior.
    • HC08 Compiler Manual - Freescale's manual for the CodeWarrior C/C++ compiler.
    • HC08 Linker Manual - Freescale's manual for the CodeWarrior linker.
    • HC08 Assembler Manual - Freescale's manual for the CodeWarrior assembler.
    • C Programming Tips - Application note on creating efficient C code for the HC08 processors.
    • Data Structures - Application note on data structures in HC08 assembly language software.
  • Sample MC908JL16 C and assembly language programs. Programs are for the CodeWarrior development system. Some of these are extremely simple, with the idea that if you can't get these to run on your project board, there is no sense trying anything more complicated.
    • jl16.c and jl16.asm - CodeWarrior C and assembler languages template programs. Empty program to add code to.
    • jl16-0.c and jl16-0.asm - Toggles an I/O port bit on and off rapidly. Output can be confirmed with an oscilloscope.
    • jl16-1.c and jl16-1.asm - Controls an LED with a switch.
    • jl16-2a.c, jl16-2b.c and jl16-2.asm - Displays a sequence of hexadecimal numbers on a seven-segent display using loops for delay. Programs jl16-2a.c and jl16-2b.c differ in that 2b shows how to get variables allocated into the zero page of RAM in CodeWarrior C.
    • jl16-3.c and jl16-3.asm - Displays a sequence of hexadecimal numbers on a seven-segment display using an internal timer and interrupts for delays. These programs requires a different linker parameter (.prm) file than the default one CodeWarrior creates in the project. folder. Use jl16-3.prm for these programs.
    • jl16-4.c and jl16-4.asm - Prints a short message on a parallel interface two line LCD display in 8-bit mode.
    • jl16-5.c and jl16-5.asm - Prints a short message on a parallel interface two line LCD display in 4-bit mode.
    • jl16-6.c - Controls a serial interface LCD display over an RS-232 link.
    • jl16-7.c - Transfers data to and from a serial EEPROM over an I²C link.
    • jl16-8.c - Stores and retrieves data in the JL16 FLASH memory.
• MC908QT4
  • MC908QT4 Datasheet - Freescale's full datasheet on the MC908QT4 (also known as MC68HC908QT4) microcontroller (1.2MB)
  • Sample MC908QT4 programs. Programs are for CodeWarrior (C or assembler.) Similar to the samples above for the JL16 but for the QT4 that comes in an 8-pin package.
    • qt4-0.asm - Toggles an I/O port bit on and off rapidly.
    • qt4-1.asm - Toggles an I/O port bit on and off at a 1Hz. rate.
    • qt4-2.asm - Toggles an I/O port bit on and off at a rate determined by a switch. Used to control the clock on the PLD demo board.