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11
11.3.4 Calculation of the A-D Conversion Time
The A-D conversion time is expressed by the sum of dummy cycle time and the actual execution
cycle time. The following shows each time factor necessary to calculate the conversion time.
Start dummy time
A time from when the CPU executed the A-D conversion start instruction to when the A-D
converter starts A-D conversion
A-D conversion execution cycle time
Comparate execution cycle time
End dummy time
A time from when the A-D converter finished A-D conversion to when the CPU can stably read
out this conversion result from the A-D data register
Scan to scan dummy time
A time during single-shot or continuous scan mode from when the A-D converter finished A-D
conversion in a channel to when it starts A-D conversion in the next channel
The equation to calculate the A-D conversion time is as follows:
A-D conversion time = Start dummy time + Execution cycle time
Note: Shown in (
converted in scan mode.
(+ Scan to scan dummy time + Execution cycle time
+ Scan to scan dummy time + Execution cycle time
+ Scan to scan dummy time .... + Execution cycle time)
+ End dummy time
) are the conversion time required for the second and subsequent channels to be
11-45
11.3 Functional Description of A-D Converters
A-D CONVERTERS
Ver.0.10
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