Jan,

You are quite correct. The summaries on page 65-68 do give more likely # cycles.

I was quoting from the individual op descriptions on pages 70-106. I have no idea what 'cycles' means in the individual descriptions. Ah-ha, I see what you mean. I would have put LCALL cycles STC:6 [8051:24]

In my earlier post, I stated that the Atmel cycles looked 'shorter' than the STC cycles, because I had originally read pp 65-68. When I wrote the later post, I skipped the summary pages, and searched for individual ops.

Anyway, the chips look very interesting. Especially the eeprom / flash combinations.

David.