Altera ALTDLL - Manual (Page 111)

A–10 Appendix A: Clear Box Generator
Clear Box Generator Options
ALTDLL and ALTDQ_DQS Megafunctions User Guide © February 2012 Altera Corporation
Table A–5 summarizes the Clear Box parameters for the ALTDQ_DQS megafunction
to configure the DQS OE path.
DQS_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 .
DQS_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 .
Table A–4. Megafunction Parameters to Configure DQS Output Path (Part 2 of 2)
Parameter Name
Optional/
Required
Default Legal Values Description
Table A–5. Megafunction Parameters to Configure DQS OE Path
Parameter Name
Optional/
Required Default Legal Values Description
USE_DQS_OE_DELAY_
CHAIN1
Optional FALSE FALSE, TRUE Instantiates DQS_OE_DELAY_CHAIN1
if TRUE
USE_DQS_OE_DELAY_
CHAIN2
Optional FALSE FALSE, TRUE Instantiates DQS_OE_DELAY_CHAIN2
if TRUE
DQS_OE_REG_MODE Optional NONE NONE, FF,
DDIO Instantiates DQS_OE_FF if FF
Instantiates DQS_OE_DDIO_OE if
DDIO
DQS_OE_REG_POWER_UP Optional LOW LOW, HIGH This parameter describes the power-up
condition of all registers in the primitive.
DQS_OE_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 .
DQS_OE_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 .