Altera ALTDLL - Manual (Page 79)

4–43 Chapter 4: Functional Description
ALTDQ_DQS Megafunction Ports
ALTDLL and ALTDQ_DQS Megafunctions User Guide © February 2012 Altera Corporation
DQSn I/O Path Ports
Table 4–18 summarizes all the ports that are specific to the DQSn I/O. All other ports
are shared with the DQS IO.
output_dq_oe_in
[n
o
-1..0]
Input Optional GND This port feeds the bidirectional DQ OE signal for
the
OUTPUT_DQ_OE_FF:d ,
OUTPUT_DQ_OE_DDIO_OE:oe ,
OUTPUT_DQ_OE_DELAY_CHAIN1:datain ,
OUTPUT_DQ_OE_DELAY_CHAIN2:datain ,
or output_dq_oe_out port.
output_dq_oe_out
[n
o
-1..0]
Output Optional — This port is driven by the
OUTPUT_DQ_OE_DELAY_CHAIN2:dataout
,
OUTPUT_DQ_OE_DELAY_CHAIN1:dataout
, OUTPUT_DQ_OE_FF:q ,
OUTPUT_DQ_OE_DDIO_OE:dataout , or
output_dq_oe_in port.
output_dq_sreset
[n
o
-1..0]
Input Optional GND This port is connected to all sreset ports in the
output DQ IO primitives that is used to
synchronously reset the registers in those
primitives.
Table 4–17. Megafunction Ports to Configure DQ OE Path (Part 2 of 2)
Port Name Type
Optional/
Required Default Description
Table 4–18. Megafunction Ports to Configure DQSN IO Path (Part 1 of 2)
Port Name Type
Optional/
Required Default Description
dqsn_areset Input Optional GND This port is connected to all areset ports in the
DQSn IO primitives that is used to asynchronously
reset the registers in those primitives.
dqsn_bus_out Output Optional — This port outputs the signal from
DQSN_ENABLE:dqsbusout ,
DQSNBUSOUT_DELAY_CHAIN:dataout , or
DQSN_DELAY_CHAIN:dqsbusout port.
dqsn_hr_oe_in[1..0] Input Optional GND This port feeds the half-rate DDR signal to the
DQSn OE path. This port is connected to the
DQSN_OE_HR_DDIO_OUT:datainhi /
datainlo port.
dqsn_hr_output_data_in
[3..0]
Input Optional GND This port feeds the half-rate DDR input signal to
the DQSn output path. This port is connected to
the
DQSN_OUTPUT_HR_DDIO_OUT_HIGH:
datainhi / datainlo and
DQSN_OUTPUT_HR_DDIO_OUT_LOW:
datainhi / datainlo ports.
dqsn_input_data_in Input Optional GND This port feeds the input signal to the DQSn input
path. This port is connected to the
DQSN_DELAY_CHAIN:dqsin ,
DQSN_INPUT_DELAY_CHAIN:datain , or
dqsn_input_data_out port.