Clarification of SPI

Jeff Williams jlw at
Fri Apr 8 07:58:27 PDT 1994

There is a statement in rev 12b of SPI on page 22 that has aroused the
interest of a few designers.  I was wondering if any of you could 
enlighten me as to it's meaning.

"The REQ/REQQ and the ACK/ACKQ receivers, after recognizing a negation
transition, shall not respond to a signal reversal for at least 10 ns."

What does this mean?

Jeffrey L. Williams                                HP TelNet: 396-5030
Disc Controllers Lab             	 Telephone: (1) (208) 396-5030
Disc Mechanism Division                  Facsimile: (1) (208) 396-6858
Hewlett-Packard Co.                    ARPANET: jlw at

More information about the T10 mailing list