Motorola 68HC05
The 68HC05 (also abbreviated as HC05) is a broad family of
).Like all Motorola processors that share lineage from the
condition code register
CCR.
Among the HC05's there are several processor families, each targeted to different embedded applications.
The 68HC05 family broke ground with the introduction of the EEPROM-based MC68HC805C4 and MC68HC805B6 variants in the late 1980s. Using a serial bootloader, they could be programmed in-circuit with simple software running on a PC and a low current 19 V supply (no programmer required).
The HC05 series is now considered legacy and is replaced by the
HC(S)08
MCU series.
Nomenclature
| MC6805xx | Motorola's first microcontroller family, implemented in HMOS. |
| MC68705xx | MC6805 parts with EPROM instead of masked ROM. |
| MC146805xx | MC6805 parts implemented in CMOS. |
| MC1468705xx | MC146805 parts with EPROM instead of masked ROM. |
| MC68HC05xx | MC6805 parts implemented in high-speed CMOS. |
| MC68HC805xx | MC68HC05 parts with EEPROM. |
External links
- 68HC05 and 6805 family datasheets - archive.org
- Archives of old 68HC05 and 68HC705 manuals
- Digital Core Design 68HC05 - HDL IP Core
- MC68HC805B6 (6k EEPROM program memory) Programmer
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