ATXMEGA32D4-CU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATXMEGA32D4-CU

8/16-bit Atmel XMEGA D4 Microcontroller

Atmel Corporation 

8135L–AVR–06/12

XMEGA D4

Problem fix/Workaround

Add one NOP instruction before checking DIF.

26. WDR instruction inside closed window will not issue reset

When a WDR instruction is execute within one ULP clock cycle after updating the window

control register, the counter can be cleared without giving a system reset.

Problem fix/Workaround

Wait at least one ULP clock cycle before executing a WDR instruction.

28. Inverted I/O enable does not affect Analog Comparator Output

The inverted I/O pin function does not affect the Analog Comparator output function

Problem fix/Workaround

Configure the analog comparator setup to give an inverted result, or use an external inverter

to change polarity of Analog Comparator Output.

29. Non available functions and options

The below function and options are not available. Writing to any registers or fuse to try and

enable or configure these functions or options will have no effect, and will be as writing to a

reserved address location.

•TWIE, the TWI module on PORTE

•TWI SDAHOLD option in the TWI CTRL register is one bit

•CRC generator module

•ADC 1/2x gain option, and this configuration option in the GAIN bits in the ADC Channel

CTRL register

•ADC VCC/2 reference option and this configuration option in the REFSEL bits on the ADC

REFCTRL register

•ADC option to use internal Gnd as negative input in differential measurements and this

configuration option in the MUXNEG bits in the ADC Channel MUXCTRL register

•ADC channel scan and the ADC SCAN register

•ADC current limitation option, and the CURRLIMIT bits in the ADC CTRLB register

•ADC impedance mode selection for the gain stage, and the IMPMODE bit in the ADC

CTRLB register

•Timer/Counter 2 and the SPLITMODE configuration option in the BYTEM bits in the

Timer/Counter 0 CTRLE register

•Analog Comparator (AC) current output option, and the AC CURRCTRL and CURRCALIB

registers

•PORT remap functions with alternate pin locations for Timer/Counter output compare

channels, USART0 and SPI, and the PORT REMAP register

•PORT RTC clock output option and the RTCOUT bit in the PORT CLKEVOUT register

•PORT remap functions with alternate pin locations for the clock and event output, and the

CLKEVPIN bit in the PORT CLKEVOUT register

•TOSC alternate pin locations, and TOSCSEL bit in FUSEBYTE2

•Real Time Counter clock source options of external clock from TOSC1, and 32.768kHz from

TOSC, and 32.768kHz from the 32.768kHz internal oscillator, and these configuration

options in the RTCSRC bits in the Clock RTCTRL register

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