SAM7X512_14 Datasheet, PDF (466/662 Pages) ATMEL Corporation – ARM-based Flash MCU

35.5.4 Conversion Results
When a conversion is completed, the resulting 10-bit digital value is stored in the Channel Data Register (ADC_CDR) of
the current channel and in the ADC Last Converted Data Register (ADC_LCDR).
The channel EOC bit in the Status Register (ADC_SR) is set and the DRDY is set. In the case of a connected PDC
channel, DRDY rising triggers a data transfer request. In any case, either EOC and DRDY can trigger an interrupt.
Reading one of the ADC_CDR registers clears the corresponding EOC bit. Reading ADC_LCDR clears the DRDY bit
and the EOC bit corresponding to the last converted channel.
Figure 35-2. EOCx and DRDY Flag Behavior
Write the ADC_CR
with START = 1
Read the ADC_CDRx
Write the ADC_CR
with START = 1
Read the ADC_LCDR
CHx
(ADC_CHSR)
EOCx
(ADC_SR)
DRDY
(ADC_SR)
Conversion Time
Conversion Time
SAM7X Series [DATASHEET]
6120K–ATARM–11-Feb-14
466