The M68HC05 and M68HC08 family

[baonguyen]

Dear everybody

          What is the different between the M68HC05 family and M68HC08 family ?

Thanks in advance

Best regards

[RaghuSorab]

Hi,

One of the differences is that, H register is not stacked when control passes over from main to an ISR.

Hence if H is being used, it should be pushed and popped in an isr.

Regards,

Raghu Sorab

[RaghuSorab]

Hi,

I forgot to mention HC08.

In HC05, H is not there I guess.

Regards,

Raghu Sorab

[rocco]

Hi, Baonguyen:

Also, the HC05 had no stack-manipulation instructions, so it was a poor candidate for writing in C.

Another also, the index register was only 8 bits on the HC05, so tables could not be larger than 256 bytes.

[peg]

Hi baonguyen,

The newer 08 is just an improved version of the older 05.

Take a look at AN1218.

Regards David

[eckhard]

Hello,

there is no HC05 with FLASH Memory.

Eckhard