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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

-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

-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

-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.

1 2 ... 74 75 76 77 78 79 80 81 82 83 84 ... 116 117

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