ATXMEGA192D3-MH View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATXMEGA192D3-MH

8/16-bit XMEGA D3 Microcontroller

Atmel Corporation 

XMEGA D3

8134I–AVR–12/10

– 1x gain:

– 2x gain:

– 4x gain:

– 8x gain:

– 16x gain:

– 32x gain:

– 64x gain:

2.4 V

1.2 V

0.6 V

300 mV

150 mV

75 mV

38 mV

Problem fix/Workaround

Keep the amplified voltage output from the ADC gain stage below 2.4 V in order to get a cor-

rect result, or keep ADC voltage reference below 2.4 V.

6. ADC Event on compare match non-functional

ADC signalling event will be given at every conversion complete even if Interrupt mode (INT-

MODE) is set to BELOW or ABOVE.

Problem fix/Workaround

Enable and use interrupt on compare match when using the compare function.

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

The propagation delay will increase by only one ADC clock cycle for 8x and 16x gain setting,

and 32x and 64x gain settings.

Problem fix/Workaround

None

8. Bandgap measurement with the ADC is non-functional when VCC is below 2.7V

The ADC can not be used to do bandgap measurements when VCC is below 2.7V.

Problem fix/Workaround

None.

9. Accuracy lost on first three samples after switching input to ADC gain stage

Due to memory effect in the ADC gain stage, the first three samples after changing input

channel must be disregarded to achieve 12-bit accuracy.

Problem fix/Workaround

Run three ADC conversions and discard these results after changing input channels to ADC

gain stage.

10. Configuration of PGM and CWCM not as described in XMEGA A Manual

Enabling Common Waveform Channel Mode will enable Pattern generation mode (PGM),

but not Common Waveform Channel Mode.

Enabling Pattern Generation Mode (PGM) and not Common Waveform Channel Mode

(CWCM) will enable both Pattern Generation Mode and Common Waveform Channel Mode.

90

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