Altera ALTDLL Manuel d'utilisateur télécharger pdf (Page 114)

A–13

Clear Box Generator Options

Table A–8 summarizes the Clear Box parameters for the ALTDQ_DQS megafunction

to configure the DQ output path. The possible values for <IO> are BIDIR_DQ and

OUTPUT_DQ.

DQ_IPA_INVERT_PHASE OptionalO FALSE FALSE, TRUE,

DYNAMIC

<IO>_IPA_HIGH.invert_phase

port on the primitive

<IO>_IPA_LOW.invert_phase

port on the primitive

DQ_HALF_RATE_USE_

DATAOUTBYPASS

Optional FALSE FALSE, TRUE <IO>_HALF_RATE_INPUT.use_

dataoutbypass port on the

primitive

Table A–7. Megafunction Parameters to Configure DQ Input Path (Part 3 of 3)

Parameter Name

Optional/

Required Default Legal Values Description

Table A–8. Megafunction Parameters to Configure DQ Output Path

Parameter Name

Optional/

Required Default Legal Values Description

USE_DQ_OUTPUT_DELAY_

CHAIN1

Optional FALSE FALSE, TRUE Instantiates

<IO>_OUTPUT_DELAY_CHAIN1 if TRUE

USE_DQ_OUTPUT_DELAY_

CHAIN2

Optional FALSE FALSE, TRUE Instantiates

<IO>_OUTPUT_DELAY_CHAIN2 if TRUE

DQ_OUTPUT_REG_MODE Optional NONE NONE, FF,

DDIO

Instantiates port on the primitive if FF

Instantiates <IO>_OUTPUT_DDIO_OUT if

DDIO

DQ_OUTPUT_REG_POWER_UP Optional LOW LOW, HIGH This parameter describes the power-up

condition of all registers in the primitive.

DQ_OUTPUT_REG_ASYNC_MODE Optional NONE CLEAR,

PRESET,

NONE

This parameter determines if the areset

port clears, presets, or has no effect on the

DDIO register(s). The areset port is

required if this parameter is set to CLEAR

or PRESET.

DQ_OUTPUT_REG_SYNC_MODE Optional NONE CLEAR,

PRESET,

NONE

This parameter determines if the sreset

port clears, presets, or has no effect on the

DDIO register(s). The sreset port is

required if this parameter is set to CLEAR

or PRESET.

1 2 ... 109 110 111 112 113 114 115 116 117

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Altera ALTDLL Manuel d'utilisateur Page 114

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