Altera ALTDLL - Manual (Page 71)

4–35 Chapter 4: Functional Description
ALTDQ_DQS Megafunction Ports
ALTDLL and ALTDQ_DQS Megafunctions User Guide © February 2012 Altera Corporation
DQS Output Path Megafunction Ports
Table 4–12 summarizes all the ports on the megafunction that configure the DQS
output path.
Table 4–12. Megafunction Ports to Configure DQS Output Path
Port Name Type
Optional/
Required Default Description
dqs_areset Input Optional GND This port is connected to the DQS_OUTPUT_FF:clrn ,
DQS_OUTPUT_DDIO_OUT:areset , and
DQS_OUTPUT_HR_DDIO_OUT_HIGH/_LOW:ares
et ports that is used to asynchronously reset all
registers in those blocks.
dqs_hr_output_data_
in[3..0]
Input Optional GND This port feeds the half-rate data to the
DQS_OUTPUT_HR_DDIO_OUT_HIGH:datainhi /
datainlo and
DQS_OUTPUT_HR_DDIO_OUT_LOW:datainhi /
datainlo ports.
dqs_hr_output_reg_clk Input Optional GND This port feeds the clock signal for the
DQS_OUTPUT_HR_DDIO_OUT_HIGH:clkh /
clklo / muxsel and
DQS_OUTPUT_HR_DDIO_OUT_LOW:clkhi /
clklo / muxsel ports.
dqs_output_data_in Input Optional GND This port feeds the DQS_OUTPUT_FF:d ,
DQS_OUTPUT_DELAY_CHAIN1:datain ,
DQS_OUTPUT_DELAY_CHAIN2:datain , or
dqs_output_data_out port.
dqs_output_data_in_
high
Input Optional GND This port feeds the
DQS_OUTPUT_DDIO_OUT:datainhi port that is
the full-rate data for the rising edge.
dqs_output_data_in_low Input Optional GND This port feeds the
DQS_OUTPUT_DDIO_OUT:datainlo port that is
the full-rate data for the falling edge.
dqs_output_data_out Output Optional — This port can be driven by the
DQS_OUTPUT_DELAY_CHAIN2:dataout ,
DQS_OUTPUT_DELAY_CHAIN1:dataout ,
DQS_OUTPUT_FF:q ,
DQS_OUTPUT_DDIO_OUT:dataout , or
dqs_output_data_in port.
dqs_output_reg_clk Input Optional GND This port is connected to the DQS_OUTPUT_FF:clk
and the
DQS_OUTPUT_DDIO_OUT:clkhi / clklo / muxsel
ports that is used to clock the registers in those blocks.
dqs_output_reg_clkena Input Optional V
CC
This port is connected to the DQS_OUTPUT_FF:ena
and the DQS_OUTPUT_DDIO_OUT:ena ports that is
used as output enable for the registers in those block.
dqs_sreset Input Optional GND This port is connected to the DQS_OUTPUT_FF:sclr
and DQS_OUTPUT_DDIO_OUT:sreset ports that is
used to synchronously reset all registers in those blocks.