Altera ALTDLL - Manual (Page 114)

A–13
Clear Box Generator Options
© February 2012 Altera Corporation ALTDLL and ALTDQ_DQS Megafunctions User Guide
Table A–8 summarizes the Clear Box parameters for the ALTDQ_DQS megafunction
to configure the DQ output path. The possible values for <IO> are BIDIR_DQ and
OUTPUT_DQ .
DQ_IPA_INVERT_PHASE OptionalO FALSE FALSE, TRUE,
DYNAMIC <IO> _IPA_HIGH.invert_phase
port on the primitive
<IO> _IPA_LOW.invert_phase
port on the primitive
DQ_HALF_RATE_USE_
DATAOUTBYPASS
Optional FALSE FALSE, TRUE <IO> _HALF_RATE_INPUT.use_
dataoutbypass port on the
primitive
Table A–7. Megafunction Parameters to Configure DQ Input Path (Part 3 of 3)
Parameter Name
Optional/
Required Default Legal Values Description
Table A–8. Megafunction Parameters to Configure DQ Output Path
Parameter Name
Optional/
Required Default Legal Values Description
USE_DQ_OUTPUT_DELAY_
CHAIN1
Optional FALSE FALSE, TRUE Instantiates
<IO>
_OUTPUT_DELAY_CHAIN1 if TRUE
USE_DQ_OUTPUT_DELAY_
CHAIN2
Optional FALSE FALSE, TRUE Instantiates
<IO>
_OUTPUT_DELAY_CHAIN2 if TRUE
DQ_OUTPUT_REG_MODE Optional NONE NONE, FF,
DDIO Instantiates port on the primitive if FF
Instantiates <IO> _OUTPUT_DDIO_OUT if
DDIO
DQ_OUTPUT_REG_POWER_UP Optional LOW LOW, HIGH This parameter describes the power-up
condition of all registers in the primitive.
DQ_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 .
DQ_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 .