Datasheet

V850ES/JG3 CHAPTER 13 A/D CONVERTER
R01UH0015EJ0300 Rev.3.00 Page 435 of 870
Sep 30, 2010
(5) Interrupt request flag (ADIF)
The interrupt request flag (ADIF) is not cleared even if the contents of the ADA0S register are changed. If the
analog input pin is changed during A/D conversion, therefore, the result of converting the previously selected
analog input signal may be stored and the conversion end interrupt request flag may be set immediately before the
ADA0S register is rewritten. If the ADIF flag is read immediately after the ADA0S register is rewritten, the ADIF flag
may be set even though the A/D conversion of the newly selected analog input pin has not been completed. When
A/D conversion is stopped, clear the ADIF flag before resuming conversion.
Figure 13-13. Generation Timing of A/D Conversion End Interrupt Request
ADA0S rewriting
(ANIn conversion start)
ADA0S rewriting
(ANIm conversion start)
ADIF is set, but ANIm
conversion does not end
A/D conversion
ADA0CRn
INTAD
ANIn ANIn ANIm ANIm
ANImANInANIn ANIm
Remark n = 0 to 11
m = 0 to 11
(6) Internal equivalent circuit
The following shows the equivalent circuit of the analog input block.
Figure 13-14. Internal Equivalent Circuit of ANIn Pin
ANIn
CIN
RIN
RIN CIN
14 kΩ 8.0 pF
Remarks 1. The above values are reference values.
2. n = 0 to 11