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Broadcom USB 3380 AB vs AA summary of changes User guide

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USB 3380 AB vs. AA Changes Summary
© PLX Technology, www.plxtech.com Page 1 of 1 06June12; v1.0
Introduction
USB 3380AB is a metal-only mask revision for USB 3380AA silicon. The AB silicon revision corrects a
number of issues that were found during testing and validation of the USB 3380AA device. These changes
are described below. Refer to the USB 3380 Errata documentation for details,
http://www.plxtech.com/products/usbcontrollers/usb3380.
USB 3380AA Documented Errata Corrected in USB 3380AB Silicon
Erratum #
Description
Risk
Category
Corrected in
AB
Err_1
Enabling ASPM L0s (and L1) on PCI Express ports causes
spurious ERR_CORR messages to be transmitted.
Low
No
Err_2
At the 5.0 GT/s signaling rate, USB 3380 transmitters apply 0
dB de-emphasis when they should apply -6 dB de-emphasis
Med
Yes
Err_3
Problems with SuperSpeed U1/U2 Link Power Management
Functions
Med
Yes
Err_4
Port 0 BAR0 address decode range is larger than requested
Low
Yes
Err_5
DMA channel for USB OUT endpoint may hang under
specific conditions
Med
Yes
Err_6
DMA channel for USB IN endpoint may hang under specific
conditions
Med
Yes
Err_7
PCIOUT endpoint may timeout too soon on PCI Express read
requests
Low
Yes
USB 3380AA Documented Cautions Corrected in USB 3380AB Silicon
Issue #
Description
Risk
Category
Corrected in
AB
Issue_1
USB link may occasionally fail to train at Super-Speed rate in
some cases.
Med
Yes
Issue_2
In Enhanced Adapter mode, Link Status registers for virtual
Port 2 and the USB Controller show incorrect values.
Low
Yes
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