Freescale 68HC11

Motorola 68HC11 is an 8 -bit microcontroller. The processor architecture is a CISC architecture with an 8- bit data bus and 16 -bit address bus and a 64 KB large address space. Furthermore it has the 68HC11 a 2 × 8-bit, or 1 x 16- bit accumulator and a 2 × 16 -bit index register. The 68HC11 supports memory mapped IO, a 16/16-Bit-Division and an 8 × 8- bit multiply. The maximum clock frequency is depending on the model 3 or 4 MHz.

Modes of operation

  • Single - chip mode: Ports B and C are used for general, parallel I / O operations, external memory is not addressable.
  • Expanded Multiplexed Mode
  • Special Test Mode: is used for internal production test, in this mode it is possible to access the programming of the configuration register. Also, this mode supports emulation and debugging during development
  • Bootstrap Mode

Members of the 68HC11 family

  • A Series additionally contains 8 KB read-only memory, 256 bytes RAM, 512 bytes EEPROM and a 8x8 -bit DA converter
  • D- series
  • E-Series HC811E2 2048 bytes of internal EEPROM, HC711E9 12K, 20K and HC711E20 HC711E32 32K EPROM or OTPROM
  • F-Series
  • G-Series
  • K Series
Complex instruction set computing
15090
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