Altera ALTDLL Manuel d'utilisateur télécharger pdf (Page 77)

4–41 Chapter 4: Functional Description

ALTDQ_DQS Megafunction Ports

ALTDLL and ALTDQ_DQS Megafunctions User Guide © February 2012 Altera Corporation

dq_output_reg_clkena Input Optional V

This port feeds the output enable signal for the

<IO>_OUTPUT_FF:ena and

<IO>_OUTPUT_DDIO_OUT:ena ports.

output_dq_areset

-1..0]

Input Optional GND This port is connected to all areset port in the

output DQ IO primitives that is used to

asynchronously reset the registers in those

primitives.

output_dq_hr_output_

data_in[4*n

-1..0]

Input Optional GND This port feeds the half-rate DDR output DQ signal

for the

OUTPUT_DQ_OUTPUT_HR_DDIO_OUT_HIGH

:datainhi / datainlo and

OUTPUT_DQ_OUTPUT_HR_DDIO_OUT_LOW:

datainhi / datainlo ports.

output_dq_output_data_

in_high[n

-1..0]

Input Optional GND This port feeds the full-rate DDR output DQ signal

(rising edge) for the

OUTPUT_DQ_OUTPUT_DDIO_OUT:datainh

i port.

output_dq_output_data_

in_low[n

-1..0]

Input Optional GND This port feeds the full-rate DDR output DQ signal

(falling edge) for the

OUTPUT_DQ_OUTPUT_DDIO_OUT:datainl

o port.

output_dq_output_data_

in[n

-1..0]

Input Optional GND This port feeds the output DQ signal for the

OUTPUT_DQ_OUTPUT_FF:d,

OUTPUT_DQ_OUTPUT_DELAY_CHAIN1:dat

ain,

OUTPUT_DQ_OUTPUT_DELAY_CHAIN2:dat

ain, or output_dq_output_data_out

port.

output_dq_output_data_

out[n

-1..0]

Output Optional — This port outputs the output DQ signal from the

OUTPUT_DQ_OUTPUT_DELAY_CHAIN2:dat

aout,

OUTPUT_DQ_OUTPUT_DELAY_CHAIN1:dat

aout, OUTPUT_DQ_OUTPUT_FF:q,

OUTPUT_DQ_OUTPUT_DDIO_OUT:dataout,

or output_dq_output_data_in port.

output_dq_sreset

-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 4–16. Megafunction Ports to Configure DQ Output Path (Part 2 of 2)

Port Name Type

Optional/

Required Default Description

1 2 ... 72 73 74 75 76 77 78 79 80 81 82 ... 116 117

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Altera ALTDLL Manuel d'utilisateur Page 77

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