15:2

0h

RO

Reserved

1

0x0

RO

Reset (RST)

When the Enable field is clear, or is being cleared in the same register update that sets this field, writing a 1b to this field, clears the associated implementation dependent page request credit Counter and pending request state for the associated Page Request Interface. No action is initiated if this field is written to 0b or if this field is written with any value when the PRE field is set. Processor graphics does not use this field, and hardwires it as read-only (0).

0

0x0

RW

Page-Request Enable (PRE)

When Set, indicates that the page request interface on the endpoint is allowed to make page requests. If both this field and the Stopped field in Page Request Status register are Clear, then the Page request interface will not issue new page requests, but has outstanding page requests for which page responses is not yet received. When this field transitions from 0 to 1, all the status fields in the Page-Request Status register are cleared. Enabling a page request interface that has not successfully stopped has indeterminate results.