Altera DQ (ALTDQ) Manual do Utilizador descarregar pdf (Página 28)

Page 28 Ports and Parameters

DQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera Corporation

Table 18 shows the bidirectional ports for the ALTDQS megafunction.

Table 19 shows the parameters for the ALTDQS megafunction.

dqsundelayedout

Non-delayed outputs from the DQS pins. Width of bus is equal to number of

DQS

pins. The size of the output port is dependent on the

NUMBER_OF_DQS

parameter.

Note to Table 17:

(1) Available for Stratix II devices only.

Table 17. ALTDQS Megafunction Output Ports (Part 2 of 2)

Port Name Required Description

Table 18. ALTDQS Megafunction Bidirectional Ports

Port Name Required Description

dqs_padio[]

Yes

Bidirectional DQS pins. Width of bus is equal to number of DQS pins. The size

of the bidirectional port is dependent on the

NUMBER_OF_DQS

parameter.

dqsn_padio[]

Bidirectional DQSn pins. Width of bus is equal to number of DQSn pins. The

size of the bidirectional port is dependent on the

NUMBER_OF_DQS

parameter.

(1)

Note to Table 18:

(1) Available for Stratix II devices only.

Table 19. ALTDQS Megafunction Parameters (Part 1 of 4)

Parameter Type Required Description

DLL_PHASE_SHIFT

String Yes Specifies DLL phase shift. The values are

, or

DQS_OE_ASYNC_RESET

String No

Specifies whether the

dqs_areset

port clears, presets, or has no

effect on the oe register. The values are

CLEAR

PRESET

, or

NONE

. If

DQS_OE_ASYNC_RESET

parameter is specified to

CLEAR

PRESET

dqs_areset

port is required. If omitted, the default value

NONE

DQS_OE_POWER_UP

String No

Specifies power-up condition of the

registers. The values are

HIGH

LOW

. If omitted, the default value is

LOW

DQS_OE_REGISTER_MODE

String No

Specifies whether the

port is registered. The values are

NONE

. If omitted, the default value is

NONE

DQS_OE_SYNC_RESET

String No

Specifies whether the

dqs_sreset

port clears, presets, or has no

effect on the oe register. The values are

CLEAR

PRESET

, or

NONE

. If

DQS_OE_SYNC_RESET

parameter is specified to

CLEAR

PRESET

the

dqs_sreset

port is required. If omitted, the default value is

NONE

DQS_OPEN_DRAIN_OUTPUT

String No

Specifies whether to use open drain mode. The values are

TRUE

FALSE

. If omitted, the default value is

FALSE

DQS_OUTPUT_ASYNC_

RESET

String No

Specifies whether the

dqs_areset

port clears, presets, or has no

effect on the DQS output registers. The values are

CLEAR

PRESET

NONE

. If the

DQS_OUTPUT_ASYNC_RESET

port is specified to

CLEAR

PRESET

, the

dqs_areset

is required. If omitted, the

default value is

NONE

DQS_OUTPUT_POWER_UP

String No

Specifies power-up condition of DQS output registers. The values

are

HIGH

LOW

. If omitted, the default value is

LOW

1 2 ... 23 24 25 26 27 28 29 30 31

Comentários a estes Manuais

Sem comentários

Altera DQ (ALTDQ) Manual do Utilizador Página 28

Comentários a estes Manuais

Manuais e produtos relacionados com Instrumentos de medida Altera DQ (ALTDQ)