Datasheet

Table Of Contents
138
XMEGA E5 [DATASHEET]
Atmel-8153J–AVR-ATxmega8E5-ATxmega16E5-ATxmega32E5_Datasheet–11/2014
38.2 Rev. A
DAC: AREF on PD0 is not available for the DAC
EDMA: Channel transfer never stops when double buffering is enabled on sub-sequent channels
ADC: Offset correction fails in unsigned mode
ADC: Averaging is failing when channel scan is enabled
ADC: Averaging in single conversion requires multiple conversion triggers
ADC accumulator sign extends the result in unsigned mode averaging
ADC: Free running average mode issue
ADC: Event triggered conversion in averaging mode
AC: Flag can not be cleared if the module is not enabled
USART: Receiver not functional when variable data length and start frame detector are enabled
T/C: Counter does not start when CLKSEL is written
EEPROM write and Flash write operations fails under 2.0V
TWI master or slave remembering data
Temperature Sensor not calibrated
Issue: DAC: AREF on PD0 is not available for the DAC
The AREF external reference input on pin PD0 is not available for the DAC.
Workaround:
No workaround. Only AREF on pin PA0 can be used as external reference input for the DAC.
Issue: EDMA: Channel transfer never stops when double buffering is enabled on sub-sequent
channels
When the double buffering is enabled on two channels, the channels which are not set in double buffering mode
are never disabled at the end of the transfer. A new transfer can start if the channel is not disabled by software.
Workaround:
CHMODE = 00
Enable double buffering on all channels or do not use channels which are not set the double buffering mode.
CHMODE = 01 or 10
Do not use the channel which is not supporting the double buffering mode.
Issue: ADC: Offset correction fails in unsigned mode
In single ended, unsigned mode, a problem appears in low saturation (zero) when the offset correction is acti-
vated. The offset is removed from result and when a negative result appears, the result is not correct.
Workaround:
No workaround, but avoid using this correction method to cancel V effect.