68HC11:  EVBplus2 Board



  Warning:  We now ship the EVBplus2 trainer without the EEPROM, 28C256, installed.  The EEPROM, 28C256, in DIP package has been discontinued by IC manufacturers.  There is no replacement available.

The EVBplus2 board is very similar to the original Motorola EVB board in terms of the PCB component layout, thus allowing a smooth transition for upgrading the old EVB board. All users’ EVB/EVBU/EVBU2 add-on boards can also be used without any modifications. A small solderless breadboard allows quick prototyping of user’s additional circuits.

The kit includes the EVBplus2 board, a solderless breadboard, a 16x2 LCD display and an RS232 DB9 cable.

For customers in US and Canada, you will also receive a free switching power AC adapter.

All 68HC11 I/O lines (PA0-PA7, PB0-PB7, PC0-PC7, PD0-PD5, PE0-PE7) on the EVBplus2 board are available to user programs. Port B and port C are emulated by 68HC24 PRU. We also added a 65C22 VIA to offer 16 more bi-direction I/O lines (port F and G) for user applications.

Example applications:

  • EVM, EVS replacement
  • 68HC11 Trainer for students
  • 68HC11 prototype platform for engineers
  • Single Chip Real Time Emulation for the 68HC711E9, E20
  • 68HC11 SBC, Single Board Computer

Note: The EVM and EVS have been discontinued by Freescale.


EVBplus2 features:

  • Includes DB9 RS232 cable for connecting to PC serial port
  • Includes AC adapter to power the board (US and Canadian orders)
  • On-board 16X2 LCD display module with LED backlight and it can be replaced by any size of LCD display module via a 16 pin cable assembly
  • On-board 4 digit seven segment display module
  • Dual RS232 ports, user can use 68HC11’s SCI for his application program
  • Eight LEDs connected to port B
  • An 8 position DIP switch connected to port C
  • Two push button switches connected to PC0 and PC1, a third is connected to PA0
  • On-board IR transceiver with built-in crystal frequency based 38KHz digital oscillator
  • RS485 communication port with 2 RJ12 jacks for daisy chain
  • On-board speaker for music applications
  • On-board potentiometer trimmer pot for analog input
  • Capable of 68HC24 port replacement unit for port B and C in real time single chip emulation
  • Additional 16 I/O lines provided by a 65C22 VIA for port F and G besides 68HC11’s ports A,B,C,D and E
  • 30K on-board RAM from $8800 to $FFFF for user code
  • All on-chip RAM $00-$1FF, and 512 bytes of EEPROM available for user program
  • All I/O pins of the 68HC11 available to user program, including PE0 and PA3
  • 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
  • Wytec debugging features
    • Built-in LCD driver software in firmware
    • 38.4K baud for fast file download, 4 time faster than a BUFFALO monitor based board
    • Single-stepping
    • Eight breakpoints
    • Data watch for memory and registers
    • User-friendly and interactive 68HC11 online assembler
    • Display 68HC11 internal registers and control bit assignment map using standard Motorola labels
    • Symbolic debugging compatibility with most assemblers and compilers, including Motorola 68HC11 assembler freeware
    • Exit a user program with <Esc> key - even if the program is hung
    • Phantom Monitor technology preserves all user interrupt vectors, including RESET - an EVBplus exclusive
  • 4 X 4 keypad header
  • Robot servo outputs
  • Logic probe with LED indicator
  • 8-sensor port for digital switches and analog sensors for robot and home automation applications
  • Fast SPI expansion port scans 10,000 I/O devices per second
  • 40 pin Motorola EVM compatible bus signal connector for logic analyzer
  • 60 pin EVB/EVBU/EVBU2 compatible male header and female socket connector for user I/O boards and fast prototyping with the on-board solderless breadboard
  • Ability to run all sample programs in the following books:
    • "Etcheverry’s Introduction to the 68HC11 Lab Manual" by Fred Etcheverry
    • "The 68HC11 Microcontroller" by Professor Joseph D. Greenfield
    • "MC68HC11 An Introduction Software and Hardware Interface" by Professor Han-Way Huang
    • "Microcomputer Engineering" by Professor Gene H. Miller
    • "Using the M68HC11 microcontroller: A guide to interface and programming" by Professor John C. Skroder
    • "Microcontroller Technology: The 68HC11" by Professor Peter Spasov
  • Package also includes useful software:
    • Fully debugged 68HC11 program examples including source code
    • Example program that simultaneously scans keypad, plays a song, multiplexes seven segment display, changes display brightness by adjusting trimmer pot and detects object by using IR transceiver as a proximity sensor
    • Eric Engler’s Windows IDE software
  • Includes Solderless breadboard
  • PC board size: 7.05" X 5.7"

All on-board I/O devices can be disabled if the board is used as an In-Circuit Emulator for user’s target board. The emulator cable assembly will be available soon.

Note: the 5V to 12V DC converter is not installed, but an 8-pin DIP socket is provided for the converter.