Motorola 68HC11
68HC11 in DIP housing
68HC11 in PLCC housing
The Motorola 68HC11 is an 8-bit - microcontroller of the family of Motorola 6800 . It was introduced in 1984, HC stands for HCMOS , as with its predecessors 68HC05 and 68HC08 .
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 . The 68HC11 also has a 2 × 8-bit or 1 × 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 multiplication. The maximum clock frequency is 3 or 4 MHz depending on the model.
Operating modes
- 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 the internal production test, in this mode it is possible to access the programming of the configuration registers. This mode also supports emulation and debugging during development
- Bootstrap mode
Members of the 68HC11 family
- A series also contains 8 KB of read-only memory , 256 bytes of RAM , 512 bytes of EEPROM and an 8 × 8-bit DA converter
- D series
- E series HC811E2 2048 byte internal EEprom, HC711E9 12K, HC711E20 20K and HC711E32 32K EPROM or OTPROM
- F series
- G series
- K series
literature
- Arnulf Wallrabe: Microcontroller practice. Get started with the MC68HC11 . Hanser reference book, 2001, ISBN 978-3-446-18981-2 .
- Lecture notes (SS2005) Microcomputer architecture Prof. Dr. Udo Kebschull
- Microcomputer technology script Prof. Plate