Last update: 1 November 2005

Introduction.   Adapt11 is a family of compact, carefully designed boards containing all the elements common to practically every 68HC11 design. Clock circuitry (8MHz crystal), reset circuitry (including a pushbutton), a mode select switch, a 5-Volt regulator, and an RS-232 interface are all provided on-board.  All of the microcontroller I/O and control lines are brought out to a versatile 50-pin header pattern on the printed circuit board. This allows for several different connector options, to support a wide variety of applications.

Rapid Deployment.  The most popular option is the solderless breadboard connector, which allows the module to be plugged vertically into a solderless breadboard, and treated like a 50-pin DIP in the user's application. The 68HC11's unique Special Bootstrap mode combined with the on-board RS232 interface make in-circuit re-programming effortless via virtual any computer's COM port.  This provides an ideal low-cost platform for application development, product prototyping, hobby projects, and educational use.

Commitment.  When the application development stage is finished, the module may be removed from the breadboard and embedded into the end-product. This may be a user-designed printed circuit board, wire-wrap board, or perfboard; or it could be a Backplane or a Prototyping card offered especially for use with Adapt11. A number of accessories are available to give the user a high degree of flexibility without spending a lot of time and money.

How do I use Adapt11 modules to quickly try out my design ideas?

It's easy! Just follow these steps...

Plug any Adapt11-series module into your solderless breadboard or application board

Wire up your application circuits (switches, motor drivers, LEDs, sensor circuits, etc.)

Write software for your application in your favourite language--  C, BASIC, or assembler (freeware/demo versions of each are included with Starter Packages)

Compile or assemble your program, producing a Motorola S-record file

Attach a serial cable (included in Starter Packages) between your PC's COM port and Adapt11's serial connector

Switch the module to 'BOOT' mode, apply power, and use our MicroLoad downloader (or your favorite loader) on your Windows PC

In approximately 30 to 90 seconds-- depending on program size, your software will be ready to run

Put Adapt11 in 'RUN' mode, and press 'RESET'. Adapt11 is now running your code!

Make changes to hardware/software, as required, and repeat previous 3 steps

UNIQUE FEATURES.  All Adapt11 modules are great for schools because they are inexpensive and can be re-programmed thousands of times! It's the perfect way for students to learn electronics, computer fundamentals, and how to design hardware & software for microcontrollers. The Motorola 68HC11 is a powerful, popular, and easy-to-use microcontroller.  A solderless breadboard means there's no need to solder parts (so they won't get damaged -- they can be used over and over). For permanent designs, just use Adapt11 Modular Prototyping accessories, such as Backplanes, Memory Expansion, & prototyping cards. Or build your circuit on perfboard, printed circuit board, or wire-wrap board, and plug Adapt11 into it.

EXPANDED CHIP MODE. The original Adapt11 is a single-chip mode board.  However, just flip a switch, and the micro runs in expanded mode, in which some of the I/O lines become address, control, and data lines. In this mode, a full 64K address space is addressable. By adding decoding circuitry, and a latch to de-multiplex the address and data lines, external EPROM, EEPROM, SRAM, Flash, and I/O chips can be used via an external board.  A memory expansion board with 32K RAM and optional 32K EEPROM is available for this.

MORE ON-BOARD MEMORY.  Some applications need expanded memory but also need all the I/O lines.  So a version called Adapt11C24DX was developed.  It includes expanded memory and a port replacement unit (to replace the ports that become address and data bus lines in expanded mode).  Note:  since the 50-pin connector is used entirely for I/O ports, the address and data lines on these boards are not accessible to the user.  The net effect of this standardized 50-pin I/O connector is that all Adapt11 family members are pin-for-pin interchangeable (with minor exceptions), so if you run out of program space with one module, you can replace it with a module having more memory.  The modular, pluggable design makes this upgrade effortless.

POWER REQUIREMENTS. All Adapt11 family modules include a low-power, low-dropout regulator on-board.  If your application hardware already supplies regulated 5VDC, you can use that to power the board.  Alternatively, you can supply unregulated 5 to 15 VDC via the external power connector and take advantage of the on-board regulator.  A 9VDC adapter will do just fine; a 9V battery can be practical if your application takes advantage of the 68HC11's low-power WAIT and STOP features to manage power consumption.

BUFFALO MONITOR.  Motorola's BUFFALO ROM-resident Debug/Monitor program can be used to varying degrees with all Adapt11 family members.  To use BUFFALO with the original (single-chip mode) Adapt11, simply use the 68HC11E9BCFN2 chip from Motorola in the MCU socket.  This chip has 512 bytes of EEPROM which can be used to store a user program.  While 512 bytes may not sound like much, it is possible to take advantage of subroutines already present in the 8K BUFFALO ROM on the chip to do many of the tasks needed in a typical program.
  BUFFALO may be used in various ways with Adapt11C24DX modules as well.  Many 68HC11E0 and 68HC11E1 chips already have BUFFALO in ROM, but it is simply disabled (via the ROMON bit in the CONFIG register).  In such cases, the ROM can simply be enabled and many of the features of BUFFALO can be utilized by the user.

EVB REPLACEMENT.  Motorola discontinued it's evaluation boards for the 68HC11 a few years ago.  For those wishing to use a similar configuration, we now offer a couple of alternatives.

EVBU:  A special version of Adapt11 with on-board features to support Motorola's BUFFALO Monitor is available (eg. PE0 jumper for "jump to internal EEPROM" and an OC5 jumper to implement the "Trace" command).  While it does not include the (discontinued) 68HC68T1 clock/calendar chip, it supports most other functions of the original EVBU.

EVB:  The Adapt11C24DXEVBSP is a low-cost configuration which includes BUFFALO in ROM and 20K RAM for user programs.

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Several Adapt11 configurations available, to suit any application:

• Adapt11
• minimal, low-cost 68HC11 design
• runs in single-chip mode, or in expanded mode with a choice of add-on memory cards
• Adapt11EVBU is a special version of Adapt11, with various features to support Motorola's BUFFALO Monitor
• Adapt11C24DX
• combines a 68HC24 Port Replacement Unit (PRU) with 68HC11 and external memory, all on one compact board
• Adapt11C24DXEVB is a special configuration of Adapt11C24DX, including BUFFALO in ROM, and is our recommended replacement for Motorola's discontinued EVB

The module you choose will depend on your application requirements. All modules are pin-for-pin compatible and interchangeable (some minor limitations apply; see descriptions below for details). Printable Adapt11 Price and Feature Chart

Adapt11

Compact form factor (1.7" x 2.8") 8 MHz crystal (2 MHz bus speed) Selector switch for Single-chip/Expanded Mode operation Compatible with 12K or 20K OTP ROM HC11 versions (68HC711E9 and 68HC711E20) Works with any 68HC11 A or E series microcontroller supplied in a 52-pin PLCC package Expanded-mode operation supports up to 64K RAM/EPROM/EEPROM/Flash (on external card) 26 general purpose I/O lines (including 3 input captures and 5 output compares) Pulse accumulator, hardware timer, real-time interrupt, watchdog, 2 hardware interrupts 8 channel 8-bit analog-to-digital converter Serial peripheral interface (SPI) port offers virtually unlimited expansion Serial Communications Interface (SCI) port, with programmable baud rate (up to 9600 baud, when using 8MHz crystal) RS-232 serial port, utilizing on-chip SCI SCI compatible with MIDI and RS485/RS422 On-board reset circuit and button, 5V regulator, and RS232 interface Low power requirements (35 mA @ 5 Volts DC, regulated nominal); much less in STOP mode All port pins are brought out to standard 50-pin connector pattern Virtual plug-in interchangeability with all Adapt11 family boards 11 connector options for the ultimate in modular design capabilities Low cost-- ideal for embedded applications Accessories available         Order Online at http://www.technologicalarts.ca/index.php

Click here for more Adapt11 Accessories

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Adapt11EVBU

Order Online at http://www.technologicalarts.ca/index.php

College-level Courseware for the 68HC11:

Volume 1: Using Adapt11
covers all the various aspects of Microcontroller Programming, including Number Systems,
Computer Concepts, DOS Basics, and Assembly Language Programming, up to and including the use of Pointers.
Includes floppy disk/CD with supporting data and utilities.
Order Code:  HC11COURSE1 (in stock)

The complete set of college-level courseware for the 68HC11 is available here:  ad11mib.html

Order Online at http://www.technologicalarts.ca/index.php

Adapt11C24DX

Compact "DX" form factor (2.8" x 2.1") Works with any 68HC11 E series microcontroller Standard version has 8 MHz crystal (2 MHz bus speed) Turbo version has 9.8304 MHz crystal (supports SCI baud rate up to 38400) Choice of 8K or 32K EEPROM (or 32K RAM) 512 bytes internal RAM (on MCUs) 28K external RAM piggy-backed on some configurations Hardware Write Protect switch for EEPROM Design includes 68HC24 port replacement unit (PRU) for full 68HC11 port compatibility 26 general purpose I/O lines (including 3 input captures and 5 output compares) Pulse accumulator, hardware timer, real-time interrupt, watchdog, 2 hardware interrupts 8 channel 8-bit analog-to-digital converter Serial peripheral interface (SPI) port offers virtually unlimited expansion Serial Communications Interface (SCI) port, with programmable baud rate RS-232 serial port, utilizing on-chip SCI SCI compatible with MIDI and RS485/RS422 On-board reset circuit and button, 5V regulator, and RS232 interface Low power requirements (45 mA nominal); much less in STOP mode Use programming language of your choice: C, BASIC, assembler, etc. Compatible with BUFFALO and PCBug11 debug/monitor programs Easy program-loading via MicroLoad, PCBug11, HCLOAD, XLOAD, ICC11, etc. All port pins are brought out to standard 50-pin connector pattern Virtual plug-in interchangeability with all Adapt11 family boards 11 connector options for the ultimate in modular design capabilities Low cost-- ideal for educational and embedded applications Accessories available compatible with BASIC11 Compiler/Simulator/Debugger/Terminal IDE for Windows

Adapt11C24DX Starter Packages:
Includes Adapt11C24DX module with 68HC11E0 and 68HC24 chips, serial cable, user manual, data sheet, schematic, & CD (includes MicroLoad downloading software, Motorola docs, freeware tools, code examples, and demo versions of commercial software).  The default connector option is SB. Specify a different one, if desired, by appending it to the order code shown.  To substitute 68HC11E1, append "1" after "K" in order code (eg. AD11C24DXSP32K1T9), and add US$3 (CD$4) to the price shown (for online shopping, mention it in the checkout comments area, and we'll make the substitution and price adjustment for you).

Order Online at http://www.technologicalarts.ca/index.php

* internal EEPROM on 68HC11E1, and 68HC11E9B is 512 bytes (from $b600 - $bfff)
** internal RAM on 68HC11E0, 68HC11E1, and 68HC11E9B is 512 bytes

Adapt11C24DX Modules:
Fully assembled and tested board with PLCC sockets for MCU and PRU chips (not included-- available separately).
Includes data sheet/schematic, and mating connector housings for power & RS232.  Replace � with desired connector option code

Order Online at http://www.technologicalarts.ca/index.php

Adapt11C24DXEVB "EVB Replacement" Starter Package:

Order Online at http://www.technologicalarts.ca/index.php