Atmel AVR XMEGA 8/16-bit High Performance Low Power Flash Microcontrollers Fiche technique télécharger pdf (Page 136)

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XMEGA B1 [DATASHEET]

Atmel-8330H-AVR-ATxmega64B1-128B1_datasheet–AVR–12/2014

38. Errata

38.1 ATxmega64B1, ATxmega128B1

38.1.1 Rev. C

•

Device revision number

• AWeX fault protection restore is not done correct in Pattern Generation Mode

1. Device revision number is unchanged between rev. B and rev. C

2. AWeX fault protection restore is not done correctly in Pattern Generation Mode

When a fault is detected the OUTOVEN register is cleared, and when fault condition is cleared, OUTOVEN is

restored according to the corresponding enabled DTI channels. For Common Waveform Channel Mode (CWCM),

this has no effect as the OUTOVEN is correct after restoring from fault. For Pattern Generation Mode (PGM),

OUTOVEN should instead have been restored according to the DTILSBUF register.

Problem fix/Workaround

For CWCM no workaround is required.

For PGM in latched mode, disable the DTI channels before returning from the fault condition. Then, set correct

OUTOVEN value and enable the DTI channels, before the direction (DIR) register is written to enable the correct

outputs again.

For PGM in cycle-by-cycle mode there is no workaround.

38.1.2 Rev. B

Not sampled.

38.1.3 Rev. A

•

Power down consumption

• ADC conversion error when x0.5 gain is used

• Disabling of USART transmitter does not automatically set the TxD pin direction to input

1. Power Down consumption

After reset, when system enters in power down or when ADC is disabled, extra power consumption is drawn.

Problem fix/Workaround

Set ADC to a configuration different from differential mode.

2. ADC conversion error when x0.5 gain is used

When the gain is set to x0.5, the conversion result is similar to the gain setting x1.

Problem fix/Workaround

There is no workaround.

3. Disabling of USART transmitter does not automatically set the TxD pin direction to input

If the USART transmitter is idle with no frames to transmit, setting TXEN to zero will not automatically set the TxD

pin direction to input.

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Atmel AVR XMEGA 8/16-bit High Performance Low Power Flash Microcontrollers Fiche technique Page 136