at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 745

• Manufacturer Part Number: at91sam9g20-cu
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

Figure 40-3. GOVRE and OVREx Flag Behavior
6384B–ATARM–15-Dec-08
(ADC_CHSR)
(ADC_CHSR)
ADC_LCDR
ADC_CDR0
ADC_CDR1
(ADC_SR)
(ADC_SR)
(ADC_SR)
(ADC_SR)
(ADC_SR)
GOVRE
ADTRG
DRDY
OVRE0
EOC0
EOC1
CH0
CH1
Undefined Data
Undefined Data
If the ADC_CDR is not read before further incoming data is converted, the corresponding Over-
run Error (OVRE) flag is set in the Status Register (ADC_SR).
In the same way, new data converted when DRDY is high sets the bit GOVRE (General Overrun
Error) in ADC_SR.
The OVRE and GOVRE flags are automatically cleared when ADC_SR is read.
Warning: If the corresponding channel is disabled during a conversion or if it is disabled and
then reenabled during a conversion, its associated data and its corresponding EOC and OVRE
flags in ADC_SR are unpredictable.
Conversion
Undefined Data
Conversion
Data A
Data A
Data B
AT91SAM9G20 Preliminary
Conversion
Data B
Data C
Read ADC_CDR1
Data C
Read ADC_CDR0
Read ADC_SR
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