Altera DQ (ALTDQ) - Manual (Page 26)

Page 26 Ports and Parameters
DQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera Corporation
Table 13 shows the output ports for the ALTDQ megafunction.
Table 14 shows the bidirectional ports for the ALTDQ megafunction.
Table 15 shows the parameters for the ALTDQ megafunction.
Table 13. ALTDQ Megafunction Output Ports
Port Name Required Description
dataout_h[] Yes
Data sampled from the padio port at the rising edge of the inclock signal.
Output port [NUMBER_OF_DQ - 1..0] wide.
dataout_l[] Yes
Data sampled from the padio port at the rising edge of the inclock signal.
Output port [NUMBER_OF_DQ - 1..0] wide.
Table 14. ALTDQ Megafunction Bidirectional Ports
Port Name Required Description
padio[] Yes
Bidirectional double-data rate (DDR) port that should directly feed a bidirectional
pin in the top-level design. The size of the bidirectional port is dependent on the
NUMBER_OF_DQ
parameter.
Table 15. ALTDQ Megafunction Parameters
Parameter Type Required Description
DDIOINCLK_INPUT String No
Specifies whether to feed the ddioinclk ports. The values are
DQSB_BUS
or NEGATED_INCLK. If omitted, the default value is
NEGATED_INCLK . You can use the DQSB_BUS value with Stratix II
devices only.
EXTEND_OE_DISABLE String No
Specifies whether to use the second OE register. The values are
TRUE
or FALSE. If omitted, the default value is FALSE.
INVERT_INPUT_CLOCKS String No
Specifies whether to invert the input clocks. The
INVERT_INPUT_CLOCKS
parameter should be used with DDR
memory. When the input clock is inverted, the first bit of data is
captured on a rising-edge clock; when the input clock in not
inverted, the first bit of data is captured on a falling-edge clock.
NUMBER_OF_DQ Integer Yes Specifies the number of DQ pins.
OE_REG String No
Specifies whether to register the oe port. The values are
REGISTERED
or UNREGISTERED.
POWER_UP_HIGH String No
Specifies the power-up condition of the I/O registers. The values
are ON or OFF. If omitted, the default value is OFF.
LPM_HINT String No
Allows you to specify Altera-specific parameters in VHDL Design
Files (.vhd). The default is UNUSED.
LPM_TYPE String No
Identifies the library of parameterized modules (LPM) entity name
in VHDL Design Files.
INTENDED_DEVICE_FAMILY String No
This parameter is used for modeling and behavioral simulation
purposes. Create the ALTDQ megafunction with the MegaWizard
Plug-in Manager to calculate the value for this parameter.