What you wrote about 1-clocker announcement is pure marketing demagogy. Each of available 8051 as so called "1-cloker" is simply marketing fake. Why? Because having 8-bit architecture with variable length of instructions (1- 2- 3- bytes), we need more than 1 CLK period to fetch the instruction. Of course someone can claim that probably they have 48-bit internal buses and so on "tricks", but so far it is not the case. For example LCALL, LJMP, DJNZ, RET and others take more than 1 CLK to fetch and execute. So in my opinion announcing that DT8051 is 1-clocker would be simple faking the audience.

this is pure baloney

a 1 clocker takes one clock per machine cycle (not per instruction)
a 12 clocker takes 12 clocks per machine cycle (not per instruction)

THUS a one clocker uses 1/12 as many clocks as a one clocker (with a few insignificant exceptions)


Erik