SPI-3: "Valid" pad bytes?

Jeff Schroeder jeffrey.schroeder at st.com
Thu May 20 12:46:12 PDT 1999


* From the T10 Reflector (t10 at symbios.com), posted by:
* Jeff Schroeder <jeffrey.schroeder at st.com>
*
I'm just coming up to speed on SPI-2 to SPI-3 changes, so I'm going to
have a few questions on the SPI-3 draft standard. So, to start...

The SPI L_Q information unit has a VBYTE field that, when set, specifies
that the pad bytes of the following information unit contain valid
information. I'm confused by this. Why would a pad byte contain valid
information? I would think it isn't a pad byte if it contains valid
information.

Could somebody explain the concept behind this? Does it really just mean
that the pad bytes may be non-zero?

Thanks,
Jeff
-- 
Jeff Schroeder
TPA Americas
STMicroelectronics, Inc., San Jose, CA
Email: jeffrey.schroeder at st.com  Phone: 408-487-3965 Fax: 408-441-8470
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