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have a question if you could
help me out that would be great, here it is:
The parameter in question is
TCVIL, see the attached spec pages
On the tester I can see the CAS2:0
data drive in manner that looks very similar to what is displayed in the
waveform on page 46. The data comes out on the AD15-AD13 pins at roughly
the same time as the start of the first INTA low pulse, and the data stays on
the outputs until just after the end of the second INTA low pulse, at which
time the pins float. I measure both TILIH and TIHIL and both are very
close to the specified 2T and 4T respectively. The problem with the TCVIL
parameter can be seen by looking at the timing diagram. TCVIL should be
roughly equal to TILIH + TIHIL which equals 6T. But the value Intel
entered under the parameter is 8T. This doesn’t make sense. I
suspect the 8T is an error and should be 6T, or that the timing diagram should
show TCVIL running through the end of the second low pulse.
We believe the limit should
be from 8T to 6T based on measurement and we suspect the datasheet is an error,
is this assumption correct!
If you could help answer this issue with the timing
parameters that would be terrific!