DOC7707 datasheet(297/307 Pages) ETC1

297 / 307 page

297

7707F–AVR–11/10

AT90USB82/162

32. Errata

32.1

AT90USB162 Errata History

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

Silicon

Release

QFP32

‘DateCode LotNumber’ marking

QFN32

‘DateCode LotNumber’ marking

First Release

‘0705 6J4972’

‘0709 J4973-2’

‘0709 J5597-1’

all lots marked

90USB162–16MES

Second Release

‘0709 F3150-1’

‘0714 50-2’

‘0722 50-3’

‘0735 3151’

Third Release

All date codes after 0709

All other lots

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