Single Board Computer with MC68HC11, 2MHz


LogoThe ZWERG11plus is an extended ZWERG11A. The essential difference to the ZWERG11A is the bigger RAM and EEPROM, both extended to 32KB. The design did not change. The ZWERG11plus uses the PRU (Port Replacement Unit MC68HC24) to be compatible to the ZWERG11A. The position and wiring of the connectors are unchanged. The ZWERG11plus also has a MC68HC11A1 controller, with a 8Bit CPU, A/D converter, various peripherals, timer system, interrupt system and memory.

A development kit is available, containing a ZWERG11plus board, the necessary cables, a serial interface module, a cross assembler and various auxiliary programs, among other things a tool for programming the MC68HC11A1/E2 and the external EEPROM. User programs are programmed directly into the internal/external EEPROM, an additional programmer is not necessary.

The software supplied with the development kit contains various example programs:

In addition, assembler source routines are included as well as definition files for the hardware.

By factory default, each ZWERG11plus comes with the monitor program "MONI11" in the EEPROM. With this monitor program, the user can immediately test the functions of the board.

! Technical Data


  • Board 51mm x 54mm, 6 layers
  • CPU MC68HC11A1 with 2MHz system clock
  • 5V supply voltage, current consumption typical 20... 30mA
  • Reset controller with voltage monitor
  • 32KB RAM
  • 32KB EEPROM for programs or data
  • TLX+/PIF-Bus for system extensions, for example graphic LCDs
  • Serial interface on IF-module connector
  • SPI (serial interface for peripheral components like parallel I/O, AD/DA converters etc.)
  • Timer system with 16Bit registers (5 x Output Compare, 3 x Input Capture)
  • A/D converter 8Bit, 8 channels
  • Port Replacement Unit (PRU MC68HC24)
  • Ca. 40 parallel in/outputs
  • Connector for alphanumeric or graphic LCDs


  • Real Time Clock plus battery
-> Manual
-> Assembly1
-> Assembly2
-> Diagram

! Development Kit

For a start we offer a complete development kit:

! Prices

Part Code Details EUR*
z11p-ent1 ZWERG11plus development kit, supply scope as described above 201.60
z11p-1 ZWERG11plus board 147.76
RTC4553 Option RTC plus battery
ICC11 Cross-compiler for HC11 V4 with manual 181.51
- HC11 Reference manual -
*VAT and shipment not included. Quantity discounts on inquiry. Products: Single Board Computers