[Bug 1017] Xglamo stalls after some time

[bugzilla-daemon at bugzilla.openmoko.org]

http://bugzilla.openmoko.org/cgi-bin/bugzilla/show_bug.cgi?id=1017

olv at openmoko.com changed:

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------- Additional Comments From olv at openmoko.com  2007-12-06 13:03 -------
Created an attachment (id=416)
 --> (http://bugzilla.openmoko.org/cgi-bin/bugzilla/attachment.cgi?id=416&action=view)
use more logical values

On page 21 of Glamo 3365 Application Note, a set of reference only values is
given.	Quoted from the spec:

1. Address bus ready and CS pin falling.
2. Setup time 30nS.
3. Write pin falling and wait pin output falling.
4. Write active time = 150nS. (If CPU supports wait function, you can skip this
setting and CPU will take it automatic.)
5. Hold time 30nS.
6. Turnaround 30nS for next read/write.

Another set of values for reading is also given, which is the same except that
it needs 280ns of active time.

s3c2442 supports wait function.  We don't really care about the active time. 
The s3c2442 manual says Tacc should be equal to or larger than 4 clocks when
nWAIT is enabled.  We choose 4 clocks here.

As for Tcos and Tcoh, the HCLK runs at 100~125MHz, which is equal to
8~10ns/clock.  To satisfy the (minimal) 30ns setup time, Tcos and Tcoh are set
to 4 clocks.

(I am pretending logical.  Correct me if I am wrong :-)



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