Altera ALTDLL Manuel d'utilisateur télécharger pdf (Page 107)

A–6 Appendix A: Clear Box Generator

Clear Box Generator Options

ALTDLL and ALTDQ_DQS Megafunctions User Guide © February 2012 Altera Corporation

Table A–3 summarizes the Clear Box parameters for the ALTDQ_DQS megafunction

to configure the DQS input path.

Table A–3. Megafunction Parameters to Configure DQS Input Path (Part 1 of 4)

Parameter Name

Optional/

Required Default Legal Values Description

USE_DQS_INPUT_DELAY_CHAIN Optional FALSE FALSE, TRUE Instantiates

DQS_INPUT_DELAY_CHAIN if

TRUE.

USE_DQS_DELAY_CHAIN Optional FALSE FALSE, TRUE Instantiates DQS_DELAY_CHAIN if

TRUE.

USE_DQS_ENABLE Optional FALSE FALSE, TRUE Instantiates DQS_ENABLE if TRUE.

USE_DQS_ENABLE_CTRL Optional FALSE FALSE, TRUE Instantiates DQS_ENABLE_CTRL if

TRUE.

USE_DQSBUSOUT_DELAY_CHAIN Optional FALSE FALSE, TRUE Instantiates

DQSBUSOUT_DELAY_CHAIN if

TRUE.

USE_DQSENABLE_DELAY_CHAIN Optional FALSE FALSE, TRUE Instantiates

DQSENABLE_DELAY_CHAIN if

TRUE.

DQS_INPUT_FREQUENCY Optional UNUSE

— This parameter is set to the frequency

of the DQS strobe/clock input

expressed as a string and, if

<phase_setting> is not set to 0, and

<use_phasectrlin> is not set to

FALSE, this needs to match the

input_frequency parameter of the DLL

feeding the delayctrlin[5..0]

input. This is an optional field and

defaults to UNUSED.

DQS_DELAY_CHAIN_

DELAYCTRLIN_SOURCE

Optional Core,

DLL

DLL This parameter is the Gray-coded delay

chain setting for the DQS read path.

This is an optional input and defaults to

GND. You can ignore this input if the

<use_phasectrlin> parameter is set to

FALSE and <phase_setting> is set to

0. You can feed this input by the

delayctrlout output of a DLL or the

core. This input does not need to

match the polarity of its source and can

be inverted (unless fed by the

delayctrlout output of a DLL).

1 2 ... 102 103 104 105 106 107 108 109 110 111 112 ... 116 117

Commentaires sur ces manuels

Pas de commentaire

Altera ALTDLL Manuel d'utilisateur Page 107

Commentaires sur ces manuels

Produits connexes et manuels pour Instruments de mesure Altera ALTDLL