RL78/G1H CHAPTER 13 A/D CONVERTER
R01UH0575EJ0120 Rev. 1.20 Page 317 of 920
Dec 22, 2016
(1) If an interrupt is generated after A/D conversion ends
If the A/D conversion result value is inside the range of values specified by the A/D conversion result
comparison function (which is set up by using the ADRCK bit and ADUL/ADLL register), the A/D conversion
end interrupt request signal (INTAD) is generated.
• While in the select mode
When A/D conversion ends and an A/D conversion end interrupt request signal (INTAD) is generated, the A/D
converter returns to normal operation mode from SNOOZE mode. At this time, be sure to clear bit 2 (AWC = 0:
SNOOZE mode release) of the A/D converter mode register 2 (ADM2). If the AWC bit is left set to 1, A/D
conversion will not start normally in the subsequent SNOOZE or normal operation mode.
(2) If no interrupt is generated after A/D conversion ends
If the A/D conversion result value is outside the range of values specified by the A/D conversion result
comparison function (which is set up by using the ADRCK bit and ADUL/ADLL register), the A/D conversion end
interrupt request signal (INTAD) is not generated.
• While in the select mode
If the A/D conversion end interrupt request signal (INTAD) is not generated after A/D conversion ends, the clock
request signal (an internal signal) is automatically set to the low level, and supplying the high-speed on-chip
oscillator clock stops. If a hardware trigger is input later, A/D conversion work is again performed in the
SNOOZE mode.
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