ATXMEGA8E5 datasheet(144/153 Pages) MICROCHIP

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Data Sheet Complete

DS40002059A-page 144

ATxmega32E5/16E5/8E5

Issue:

TWI SM bus level one Master or slave remembering data

If a write is made to Data register, prior to Address register, the TWI design sends the data as soon as the write to

Address register is made. But the send data will be always 0x00.

Workaround:

Since single interrupt line is shared by both timeout interrupt and other TWI interrupt sources, there is a possibility in

software that data register will be written after timeout is detected but before timeout interrupt routine is executed. To

avoid this, in software, before writing data register, always ensure that timeout status flag is not set.

Issue:

Temperature sensor not calibrated

Temperature sensor factory calibration is not implemented on devices before date code 1324.

Workaround:

None.

Issue:

Automatic port override on PORT C

When Waveform generation is enabled on PORT C Timers, Automatic port override of peripherals other than Tc may

not work even though the pin is not used as waveform output pin.

Workaround:

No workaround.

Issue:

Sext timer is not implemented in slave mode

In slave mode, only Ttout timer is implemented. Sext timer is needed in slave mode to release the SCL line and to

allow the master to send a STOP condition. If only master implements Sext timer, slave continues to stretch the SCL

line (up to the Ttout timeout in the worse case).

Sext = Slave cumulative timeout.

Workaround:

No workaround.

ATXMEGA8E5 bảng dữ liệu(PDF) 144 Page - Microchip Technology