ATXMEGA128D4 datasheet(90/100 Pages) ATMEL

90 / 100 page

8135G–AVR–08/10

XMEGA D4

33. Errata

33.1

ATxmega32D4, ATxmega16D4 rev. A

• Flash Power Reduction Mode can not be enabled when entering sleep mode

• Bandgap voltage input for the ACs cannot be changed when used for both ACs simultaneously

• Bandgap measurement with the ADC is non-functional when V

CC is below 2.7V

• ADC gain stage cannot be used for single conversions

• ADC gain stage output range is limited to 2.4V

• ADC has increased INL error for some operating conditions

• ADC propagation delay is not correct when 8x-64x gain is used

• BOD will be enabled after any reset

• VCC voltage scaler for AC is non-linear

• TWIE is not available

• Inverted I/O enable does not affect Analog Comparator Output

Flash Power Reduction Mode can not be enabled when entering sleep mode

If Flash Power Reduction Mode is enabled when a deep sleep mode, the device will only

wake up on every fourth wake-up request.

If Flash Power Reduction Mode is enabled when entering Idle sleep mode, the wake-up time

will vary with up to 16 CPU clock cycles.

Problem fix/Workaround

Disable Flash Power Reduction mode before entering sleep mode.

Bandgap voltage input for the ACs cannot be changed when used for both ACs

simultaneously

If the bandgap voltage is selected as input for one Analog Comparator (AC) and then

selected/deselected as input for the another AC, the first comparator will be affected for up

to 1 us and could potentially give a wrong comparison result.

Problem fix/Workaround

If the Bandgap is required for both ACs simultaneously, configure the input selection for both

ACs before enabling any of them.

Bandgap measurement with the ADC is non-functional when V

CC is below 2.7V

The ADC cannot be used to do bandgap measurements when V

CC is below 2.7V.

Problem fix/Workaround

If internal voltages must be measured when V

CC is below 2.7V, measure the internal 1.00V

reference instead of the bandgap.

ADC gain stage cannot be used for single conversion

The ADC gain stage will not output correct result for single conversions that is triggered and

started from software or the event system.

Problem fix/Workaround

When the gain stage is used, the ADC must be set in free running mode for correct results.

ATXMEGA128D4 Datasheet(PDF) 90 Page - ATMEL Corporation

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