AT32UC3C1512C Automotive Atmel Corporation, AT32UC3C1512C Automotive Datasheet - Page 1109

• Manufacturer Part Number: AT32UC3C1512C Automotive
• Manufacturer: Atmel Corporation

36.6.7
9166C–AVR-08/11
Oversampling Mode
Figure 36-7. Multiplexers Settle Time Depending on the CFG.MUXSET Configuration Bit
The chronogram above shows that for the same start of conversion (SOC) event, CkADC rises
one PB clock period later. The ADC and S/H are sampling when CkADC is high, so setting the
CFG.MUXSET bit will delay the sampling phase by one PB clock period.
To improve conversion accuracy, it is recommended to perform oversampling. This is particu-
larly useful for high impedance sources. This mode can be used whether the ADC is used in
direct mode or not. Please note that it behaves as if a sequence of 2 consecutive conversions
had been programmed with the first conversion ignored. The consequence is a conversion rate
divided by 2. Also note that this mode cannot be used in conjonction with the Dynamic mode. If
dynamic and oversampling modes are both enabled, dynamic mode will be applied.
Figure 36-8. Oversampling
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