February 2003
Intermediate to advanced
592 pages
11h 47m
English
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LDTSTOP# Disconnect Sequence
After a HyperTransport technology disconnect/reconnect sequence, devices that implement the LDTSTOP# protocol are required to update their link widths in exactly the same way as they do after a warm reset sequence. This allows initialization software for systems built from such devices to use the LDTSTOP# protocol rather than warm reset to invoke link width changes. The following requirements exist when during Reset with LDTSTOP#.
The LDTSTOP# pin must be deasserted for at least 1 microsecond before RESET# is deasserted.
LDTSTOP# must remain deasserted until the link initialization sequence, described later in this section, has completed.
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