Altera DQ (ALTDQ) - Manual (Page 11)

Getting Started Page 11
November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) Megafunctions
Page 7 of the ALTDQS parameter editor is the Dsqn_padio Port page. Table 6 on
page 11 describes options available on page 7 of the ALTDQS megafunction.
Table 6. DQSn_padio Port Settings
Option Description
Supported Devices
Cy
clone
II
Cyclone
III, Cyclone
IV
GX
Str
a
tix, St
ratix GX,
Stra
tix
II,
Stratix
II
GX, Arria
GX, HardCopy
II
How do you want to use the
‘dqsn_padio’ port?
Use negative DQS pin as an input during read cycles,
and output during write cycles or a bidirectional signal
for read and write.
If the Allow DQS to be disabled during read post
amble option has been selected on page 3, only Not
used and Output modes options are available.
If Allow DQS to be disabled during read post-amble
option selected on page 3, all modes are available.
Yes Yes No Yes
What is the phase shift when
used in timing analysis?
This is the phase shift amount (0°, 30°, 60°, 90°, 120°)
assumed during timing analysis. This is to compute the
static delay during timing analysis.
Yes Yes No Yes