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68HC11:  Fox11 Trainer Board

 

 

 
   
   
Warning: We now ship the Fox11 trainer without the EEPROM, 28C256, installed.  The EEPROM, 28C256, in DIP package has been discontinued by IC manufacturers.  There is no replacement available.

The Fox11 68HC11 trainer is specially designed for students in the classroom environment.

Many colleges require students to buy their own trainers, so students can work off-campus and school is not responsible for maintenance of the trainers. In addition, this reduces lab manager's workload. It's a great idea, but the only problem is the cost because students first have to buy textbooks before buying trainers. Our EVBplus2 board is well received by many universities around the world as a piece of lab equipment,

The FOX11 board combines and caters to many professors' ideas and suggestions, so it easily meets or exceeds the requirements of their courses and lab assignments. We have chosen one board approach instead of a modular approach for reliability and low cost. Although modular approach has its own merits, it is more suitable for extracurricular activities by more experienced users who have more trouble-shooting ability, such as a robot controller application.

When a board has more mechanic connections, then it will have less reliability. For a student, as a beginner, the course itself is already too hard to finish in a short semester, so why should he or she be responsible for trouble-shooting any unnecessary problems caused by more mechanical connections? Also, if you add all modules together to duplicate the functions that the FOX11 board offers, it will be way over your budget. Our trainer is not only a one-piece approach, but also is a perfectly sized board for a trainer. You need a small board, which does not occupy too much space on the bench. At the same time, it cannot be too small and without much weight. For example, if you move the RS232 cable a little bit accidentally, your whole project could move chaotically, even flipping everything over if the board is very small. You are quite lucky if you don't burn anything.

The goal of the FOX11 trainer is to cover 5 most important hardware elements in the 68HC11 for educational purpose and also keep it affordable.

The 5 components namely SCI, SPI, Timer, ADC and external memory interface that are very important subjects for students to learn are all covered by our FOX11 board.
 


On our FOX11 board, it has:

1.     Two RS232 ports with independent baud rates, one is for development work, the other one is for user SCI application.  Image how hard to debug your code if your application uses the SCI of 68HC11?  What if your application needs a higher baud rate? Itís impossible to do it with only one RS232 port.

2.    A SPI header for communicating your external SPI device, such as LED, LCD, relay and I/O expansion boards.

3.    Eight LED indicators can be used for monitoring pulses that are generated by timers. An on-board speaker can produce music or other waveforms via timer system

4.    A potentiometer can be used to adjust input voltage of an Analog to Digital Converter channel.
 

5.    A 40 pin female socket provides all address, data and control signals for connecting external memory or I/O devices to learn 68HC11 memory interface in expanded mode.
  This is a very important fundamental subject where the 68HC11 shines comparing to other microcontrollers.  A female socket is easier than a male header for student connect signals to an external memory or I/O chip on the breadboard via jumper wires.


The FOX11 board comes with 2 built-in monitors for different teaching methods. They are pre-installed in an on-chip EPROM. The BUFFALO monitor is the default monitor, meaning the board will start up with BUFFALO monitor. In BUFFALO monitor mode, a professor does not have to change his teaching materials and lab assignments. It works just like a regular Motorola EVB/EVBU board but with a lot more on-board peripherals. In Wytec Monitor mode, it will allow symbolic debugging, data watch, and many unique features that will surprise you. 

 

FOX11 Features:

  • 68HC11E1 with on-board 32K RAM
  • Includes 6 foot DB9 RS232 cable for connecting to PC serial port
  • Includes AC adapter to power the board (US and Canadian orders)
  • Installed with BUFFALO 3.4 monitor. This allows professors to avoid changing teaching material if using the board in BUFFALO monitor mode, since all programs for EVB/EVBU/EVBU2 boards can run with identical memory maps
  • Auto-start user application program from on-board EEPROM via a jumper change
  • Two RS232 ports with independent baud rates. PC communication uses external UART and 68HC11's SCI is dedicated to user's application program, including wireless communication
  • PORT B and PORT C replacement
  • Eight LEDs connected to port B
  • An 8 position DIP switch connected to port C
  • A 16 pin connector for a LCD display module of any size
  • A 4 X 4 keypad
  • A 10-pin SPI port
  • A 26-pin header for connecting the 68HC11's port A, D and E to user's external circuits
  • 40 pin Motorola EVM compatible bus signal female socket connector provides data, address and control signals for external device interface
  • 60 pin EVB/EVBU/EVBU2 compatible female socket connector provides 68HC11 ports A,B,C,D and E for fast prototyping with on-board solderless breadboard
  • Two push button switches connected to PC0 and PC1, a third is connected to PA0
  • On-board speaker for music applications
  • On-board potentiometer trimmer pot for analog input
  • Two robot servo outputs
  • Logic probe with LED indicator
  • Large ground test point
  • Large solderless breadboard
  • Students can add application circuits without buying add-on boards. Underneath the solderless breadboard, footprints are provided for:
    • DS1302 real time clock
    • DS1602 temperature controller
    • L293D motor controller
    • DPDT form C relay output
    • RS485 communication port with 2 RJ12 jacks for daisy chain
    • RF transceiver
  • 60-pin user programmable header
  • Package also includes useful software:
    • Fully debugged 68HC11 program examples including source code
    • 68HC11 test program that simultaneously scans keypad, plays a song, makes a LED chaser from PB0-PB7 LEDs, changes LED brightness by adjusting trimmer pot
    • Eric Engler's Windows IDE software with the Motorola free assembler
  • PC board size: 7" x 5.9" (178mm x 150mm)

The price includes 32K RAM, 32K EPROM, a large solderless breadboard, a 6 foot RS232 cable and a 110V AC adapter ( US, Mexico and Canada orders only)

 


The 4x4 keypad is connected to the header on the left edge of the PCB.