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CHAPTER 18 8-/10-BIT A/D CONVERTER
18.5.4 Conversion Using EI
2
OS Function
The 8-/10-bit A/D converter can transfer the A/D conversion result to memory by using
the EI
2
OS function.
■ Conversion Using EI
2
OS
The use of the EI
2
OS enables the A/D-converted data protection function to transfer multiple data to
memory without the loss of converted data even if A/D conversion is performed continuously.
The conversion flow when the EI
2
OS is used is shown in Figure 18.5-4 .
Figure 18.5-4 Flow of Conversion when Using EI
2
OS
A/D converter starts
Sample & hold
A/D conversion starts
A/D conversion terminates
Interrupt generated
EI
2
OS starts
Converted data transferred
Interrupt processing
Interrupt cleared
Specified count
completed?*
*: The specified count depends on the setting of the EI
2
OS.
YES
NO