Altera ALTDLL Instrukcja Użytkownika Pobierz pdf (Strona 111)

A–10 Appendix A: Clear Box Generator

Clear Box Generator Options

ALTDLL and ALTDQ_DQS Megafunctions User Guide © February 2012 Altera Corporation

Table A–5 summarizes the Clear Box parameters for the ALTDQ_DQS megafunction

to configure the DQS OE path.

DQS_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.

DQS_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.

Table A–4. Megafunction Parameters to Configure DQS Output Path (Part 2 of 2)

Parameter Name

Optional/

Required Default Legal Values Description

Table A–5. Megafunction Parameters to Configure DQS OE Path

Parameter Name

Optional/

Required Default Legal Values Description

USE_DQS_OE_DELAY_

CHAIN1

Optional FALSE FALSE, TRUE Instantiates DQS_OE_DELAY_CHAIN1

if TRUE

USE_DQS_OE_DELAY_

CHAIN2

Optional FALSE FALSE, TRUE Instantiates DQS_OE_DELAY_CHAIN2

if TRUE

DQS_OE_REG_MODE Optional NONE NONE, FF,

DDIO

Instantiates DQS_OE_FF if FF

Instantiates DQS_OE_DDIO_OE if

DDIO

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

condition of all registers in the primitive.

DQS_OE_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.

DQS_OE_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.

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