Altera DQ (ALTDQ) - Manual (Page 28)

Page 28 Ports and Parameters
DQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera Corporation
Table 18 shows the bidirectional ports for the ALTDQS megafunction.
Table 19 shows the parameters for the ALTDQS megafunction.
dqsundelayedout No
Non-delayed outputs from the DQS pins. Width of bus is equal to number of
DQS
pins. The size of the output port is dependent on the NUMBER_OF_DQS
parameter.
Note to Table 17 :
(1) Available for Stratix II devices only.
Table 17. ALTDQS Megafunction Output Ports (Part 2 of 2)
Port Name Required Description
Table 18. ALTDQS Megafunction Bidirectional Ports
Port Name Required Description
dqs_padio[] Yes
Bidirectional DQS pins. Width of bus is equal to number of DQS pins. The size
of the bidirectional port is dependent on the NUMBER_OF_DQS parameter.
dqsn_padio[] No
Bidirectional DQSn pins. Width of bus is equal to number of DQSn pins. The
size of the bidirectional port is dependent on the NUMBER_OF_DQS parameter.
(1)
Note to Table 18 :
(1) Available for Stratix II devices only.
Table 19. ALTDQS Megafunction Parameters (Part 1 of 4)
Parameter Type Required Description
DLL_PHASE_SHIFT String Yes Specifies DLL phase shift. The values are 0, 72, or 90.
DQS_OE_ASYNC_RESET String No
Specifies whether the dqs_areset port clears, presets, or has no
effect on the oe register. The values are CLEAR, PRESET, or NONE. If
DQS_OE_ASYNC_RESET
parameter is specified to CLEAR or
PRESET , dqs_areset port is required. If omitted, the default value
is NONE.
DQS_OE_POWER_UP String No
Specifies power-up condition of the oe registers. The values are
HIGH
or LOW. If omitted, the default value is LOW.
DQS_OE_REGISTER_MODE String No
Specifies whether the oe port is registered. The values are
REGISTER
or NONE. If omitted, the default value is NONE.
DQS_OE_SYNC_RESET String No
Specifies whether the dqs_sreset port clears, presets, or has no
effect on the oe register. The values are CLEAR, PRESET, or NONE. If
DQS_OE_SYNC_RESET
parameter is specified to CLEAR or PRESET,
the dqs_sreset port is required. If omitted, the default value is
NONE
.
DQS_OPEN_DRAIN_OUTPUT String No
Specifies whether to use open drain mode. The values are TRUE or
FALSE
. If omitted, the default value is FALSE.
DQS_OUTPUT_ASYNC_
RESET
String No
Specifies whether the dqs_areset port clears, presets, or has no
effect on the DQS output registers. The values are CLEAR, PRESET,
or NONE. If the DQS_OUTPUT_ASYNC_RESET port is specified to
CLEAR
or PRESET, the dqs_areset is required. If omitted, the
default value is NONE.
DQS_OUTPUT_POWER_UP String No
Specifies power-up condition of DQS output registers. The values
are HIGH or LOW. If omitted, the default value is LOW.