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home > 68hcxx
the accumulator-based low-end 68hc05 mc has few registers and a stripped-down instruction set with 64 instructions. 10 uncomplicated addressing modes, direct access a maximum of 64 kbytes, more than 180 versions of the 68hc05 available. the 68hc08 provides a code-compatible performance extension to the 68hc05 along with 78 new instructions and 16-bit index register, stack pointer and program counter.

Here are the best overviews and tutorials for 68hcxx:

tutorial, 5 stars
Freescale's 'Embedded Learning Center'
Freescale courses on i.MX, PowerPC, and ColdFire and other Freescale architectures. The navigation of the site is very difficult, but if you poke around you can locate these 'free' tutorials, papers, and Webinars on important Freescale topics. Also includes tutorials on DSP, Zigbee, and RF.

tutorial, 4 stars
68HC05 Family Tutorial
The Tutorial starts with an architectural overview of the 68HC05 central processor unit (CPU). It covers memory organization, the CPU programmer's model, stack pointer operation, and the 68HC05 instruction set and its addressing modes. Once learned, this knowledge is applicable to all 68HC05 devices, because they all use the same CPU.

tutorial, 4 stars
68HC11 Assembly Tutorial
HC12 assembly is very similar to HC11 programming. When searching for examples elsewhere, look for HC11 code too!

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