The Motorola 68HC11

 Fred Kaufman

    CMSC 391 - Summer I 2004

The MC 68HC11 is an 8 bit - 16 bit addressable MCU  with built in EEPROM , PWM, A/D converters and running at a bus speed of up to 4MHZ.  It is optimized for low power consumption.  The 68MC11 is constructed using HCMOS technology (High-density complementary metal-oxide semiconductor)  and comes in a number of pin and package configurations. Datasheet.

The MC 68HC11 family:  The MC 68HC11 comes in numerous flavors depending on the particular application.  Various ROM,  onboard EEPROM,  A/D converters,  output pin options  and so on are available.

The MC 68HC11 can be programmed in numerous languages. High on the list is C and assembly,  but also includes Basic and Forth.

The instruction set is what you expect to find on an 8 bit chip.  The nmemonics are quite different than what we are used to.  Ld for load instead of MOV. 

The 68HC11 is relatively cheap although it is beginning to be phased out for newer architectures. Chip prices are in the $2.65- 2.75 range for quantities of 1000+.

Applications for the 68HC11 is almost limitless.  It is especially popular for the hobbyist and educational markets due to its large number of assemblers, compilers, debuggers and development boards that are available.   A quick search on Google will find you thousands of Links of projects and products.

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