STMicroelectronics STV-676/501C-R01, User Manual

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Design issues STV0676
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6 Design issues
Star-points should be used on the power and ground planes to reduce crosstalk between analogue
and digital supplies (see Gerber files).
6.1 Silicon Revision.
The STV0676 entered production at silicon revision 1.2, identification of the Silicon revision is
possible by looking at the device, the first two letters on the line printed below “STV0676” denote the
silicon revision. Revision 1.2 has the device markings AC*******.
Devices of revisions prior to 1.2 should not be used.
6.2 USB compliance testing using USBCV
The STV0676 will fail USB compliance testing if the USBCV compliance tool is used, USBCV is a
compliance tool developed by USBIF.
This minor issue does not in any way affect the device operation on the operating systems the
STV0676 has been tested on.
To achieve USB compliance, it is necessary to add an external EEPROM to the design, details of
the contents of this EEPROM are available from STMicroelectronics.