AT90USB82/162
32. Errata
32.1 AT90USB162 Errata History
Silicon
QFP32
QFN32
Release
‘DateCode LotNumber’ marking
‘DateCode LotNumber’ marking
‘0705 6J4972’
‘0709 J4973-2’
‘0709 J5597-1’
all lots marked
First Release
90USB162–16MES
‘0714 50-2’
‘0722 50-3’
‘0735 3151’
Second Release
‘0709 F3150-1’
Third Release
All date codes after 0709
All other lots
32.1.1
AT90USB162 First Release
1. High current consumption in sleep mode
If a pending interrupt cannot wake the part up from the selected mode, the current consump-
tion will increase during sleep when executing the SLEEP instruction directly after a SEI
instruction.
Problem Fix/workaround
Before entering sleep, interrupts not used to wake up the part from the sleep mode should
be disabled.
2. PS2 high level clamped to UCAP
When configured in PS2 mode, the output high level is clamped to the UCAP voltage level.
Problem Fix/workaround
None.
3. Transient perturbation in USB suspend mode generates overconsumption
In device mode and when the USB is suspended, transient perturbation received on the
USB lines generates a wake up state. However the idle state following the perturbation does
not set the SUSPI bit anymore. The internal USB engine remains in suspend mode but the
USB differential receiver is still enabled and generates a typical 300µA extra-power con-
sumption. Detection of the suspend state after the transient perturbation should be
performed by software (instead of reading the SUSPI bit).
Problem fix/workaround
USB waiver allows bus powered devices to consume up to 2.5mA in suspend state.
32.1.2
AT90USB162 Second Release
1. High current consumption in sleep mode
If a pending interrupt cannot wake the part up from the selected mode, the current consump-
tion will increase during sleep when executing the SLEEP instruction directly after a SEI
instruction.
Problem Fix/workaround
297
7707DS–AVR–07/08
ATMEL [ ATMEL ]
