[MtFuji] Consulting Item from SATA-IO: [Digital] Minutes from 1/25/2010

keiji_katata at post.pioneer.co.jp keiji_katata at post.pioneer.co.jp
Thu Feb 4 23:41:25 PST 2010

* From the T10 Reflector (t10 at t10.org), posted by:
* keiji_katata at post.pioneer.co.jp
Hi Frank,
I have a question.
How long delay does a host have to start sending the Host ALIGNp signal after
device started sending the device ALIGNp signal?
Device continues the device ALIGNp signal for 54.6us. For example if a host
should return the Host ALIGNp signal within 10us from a device ALIGNp signal
start, the device has 44.6us for detect the host ALIGNp signal. After 8
ALIGNp signal detection time (maybe 0.1us or less) device can decide that
is no host that returns the GENx ALIGNp signal. In this case, the device can
judge no host condition at 11us after the start of sending the device ALIGNp
signal. So proposed 1us transition time is very long enough for the device
How long delay is specified in the spec?
Best regards,
Keiji Katata
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