Altera ALTDLL Manual do Utilizador descarregar pdf (Página 84)

Chapter 4: Functional Description 4–48

Correct Settings for External Memory Interfaces

Table 4–22 shows the correct OCT parameter settings for the DDR, QDR, and

RLDRAM interfaces.

Table 4–23 shows the correct OCT port use for the DDR, QDR, and RLDRAM

interfaces.

Table 4–22. General OCT Parameter Settings for DDR, QDR, and RLDRAM Interfaces

Parameter

Controller

Full-Rate Half-Rate

Enable Dynamic OCT Turned on Turned on

Enable OCT delay chain 1 Turned on / Turned off Turned on / Turned off

Enable OCT delay chain 2 Turned on / Turned off Turned on / Turned off

OCT register mode FF FF

Table 4–23. General OCT Ports for DDR, QDR, and RLDRAM Interfaces

Parameter

Controller

Full-Rate Half-Rate

DQS_OCT_IN Used Used

DQSN_OCT_IN Used Used

BIDIR_DQ_OCT_IN Used if DQ pin is bidirectional Used if DQ pin is bidirectional

INPUT_OCT_IN Used for DQ pin as input Used for DQ pin as input

OUTPUT_OCT_IN Used for DQ pin as output Used for DQ pin as output

DQS_HR_OCT_IN Used Unused

DQSN_HR_OCT_IN Used Unused

BIDIR_DQ_HR_OCT_IN Used Unused

INPUT_DQ_HR_OCT_IN Used Unused

OUTPUT_DQ_HR_OCT_IN Used Unused

OCT_REG_CLK Used Used

HR_OCT_REG_CLK Used if controller is at half-rate Unused

DQS_OCT_OUT Used Used

DQSN_OCT_OUT Used Used

BIDIR_DQ_OCT_OUT Used if DQ pin is bidirectional Used if DQ pin is bidirectional

INPUT_DQ_OCT_OUT Used for DQ pin as input Used if DQ pin is bidirectional

OUTPUT_DQ_OCT_OUT Used for DQ pin as output Used if DQ pin is bidirectional

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