Altera ALTDLL - Manual (Page 112)

A–11
Clear Box Generator Options
© February 2012 Altera Corporation ALTDLL and ALTDQ_DQS Megafunctions User Guide
Table A–6 summarizes the Clear Box parameters for the ALTDQ_DQS megafunction
to configure the OCT path. The possible values for <IO> are DQS , DQSn , BIDIR_DQ
and OUTPUT_DQ .
Table A–7 summarizes the Clear Box parameters for the ALTDQ_DQS megafunction
to configure the DQ input path. The possible values for <IO> are BIDIR_DQ and
INPUT_DQ .
Table A–6. Megafunction Parameters to Configure OCT Path
Parameter Namer
Optional/
Required Default Legal Values Mapping to Sub-Blocks
USE_OCT_DELAY_CHAIN1 Optional FALSE FALSE, TRUE Instantiates
<IO>
_OCT_DELAY_CHAIN1 if TRUE
USE_OCT_DELAY_CHAIN2 Optional FALSE FALSE, TRUE Instantiates
<IO>
_OCT_DELAY_CHAIN2 if TRUE
OCT_REG_MODE Optional NONE NONE, FF, DDIO Instantiates <IO> _OCT_FF if FF
Instantiates <IO> _OCT_DDIO_OE if
DDIO
Table A–7. Megafunction Parameters to Configure DQ Input Path (Part 1 of 3)
Parameter Name
Optional/
Required Default Legal Values Description
USE_DQ_INPUT_DELAY_
CHAIN
Optional FALSE FALSE, TRUE Instantiates
<IO>
_INPUT_DELAY_CHAIN if
TRUE
DQ_INPUT_REG_MODE Optional NONE NONE, FF, DDIO Instantiates <IO> _INPUT_FF if FF
Instantiates <IO> _DDIO_IN if DDIO
DQ_INPUT_REG_POWER_UP Optional LOW LOW, HIGH This parameter describes the power-up
condition of all registers in the
primitive.
DQ_INPUT_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_INPUT_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 .