Altera ALTDLL - Manual (Page 75)

4–39 Chapter 4: Functional Description
ALTDQ_DQS Megafunction Ports
ALTDLL and ALTDQ_DQS Megafunctions User Guide © February 2012 Altera Corporation
bidir_dq_input_data_ou
t[n
b
-1..0]
Output Optional — This port outputs the bidirectional DQ signal from
the
BIDIR_DQ_INPUT_DELAY_CHAIN:dataout ,
BIDIR_DQ_INPUT_FF:q , or
bidir_dq_input_data_in port.
bidir_dq_sreset
n
b
-1..0]
Input Optional GND This port is connected to all sreset port in the
bidirectional DQ IO primitives that is used to
synchronously reset the registers in those primitives.
dll_delayctrlin
5..0]
Input Optional GND This port receives the Gray-coded delay chain setting
for the DQ read path from the
delayctrlout[5..0] port of the ALTDLL.
dq_input_reg_clk Input Optional GND This port feeds the clock signal for the
<IO>
_INPUT_FF:clk and <IO> _DDIO_IN:clk
ports.
dq_input_reg_clkena Input Optional V
CC
This port feeds the output enable signal for the
<IO>
_INPUT_FF:ena and <IO> _DDIO_IN:ena
ports.
dq_ipa_clk Input Optional GND This port feeds the clock signal for the
<IO>
_IPA_HIGH:clk and <IO> _IPA_LOW:clk
ports.
input_dq_areset
[n
i
-1..0]
Input Optional GND This port is connected to all areset port in the
input DQ IO primitives that is used to
asynchronously reset the registers in those
primitives.
input_dq_hr_input_data
_out[4*n
i
-1..0]
Output Optional — This port outputs the half-rate DDR input DQ signal
from the
INPUT_DQ_HALF_RATE_INPUT:dataout
port.
input_dq_input_data_in
[n
i
-1..0]
Input Optional GND This port feeds the input DQ signal for the
INPUT_DQ_INPUT_DELAY_CHAIN:datain ,
INPUT_DQ_INPUT_FF:d ,
INPUT_DQ_DDIO_IN:datain , or
input_dq_input_data_out port.
input_dq_input_data_ou
t_high[n
i
-1..0]
Output Optional — This port outputs the full-rate DDR input DQ signal
(rising edge) from the
INPUT_DQ_IPA_HIGH:dataou t or
INPUT_DQ_DDIO_IN:regouthi .
input_dq_input_data_ou
t_low[n
i
-1..0]
Output Optional — This port outputs the full-rate DDR input DQ signal
(falling edge) from the
INPUT_DQ_IPA_LOW:dataout or
INPUT_DQ_DDIO_IN:regoutlo .
input_dq_input_data_ou
t[n
i
-1..0]
Output Optional — This port outputs the input DQ signal from the
INPUT_DQ_INPUT_DELAY_CHAIN:dataout ,
INPUT_DQ_INPUT_FF:q , or
input_dq_input_data_in port.
input_dq_sreset
[n
i
-1..0]
Input Optional GND This port is connected to all sreset ports in the
input DQ IO primitives that is used to synchronously
reset the registers in those primitives.
Table 4–15. Megafunction Ports to Configure DQ Input Path (Part 2 of 2)
Port Name Type
Optional/
Required
Default Description