In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Kenneth wrote:

You can find the "delay value" m in this loop:

mov m,#?

delay

decsz m ; m + 1
jmp delay ; 3*(m - 1)

by the formula:

x = (1/fclk)*(4m - 2) <==> m = (x*fclk + 2) / 4 .

If you keep fclk in MHz you will have x in usec. Keep in mind that m >= 1.

cheers,
Kenneth

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