
DescriptionTypeParameter
Specifies whether the fbmimicbidir port is used. Values
are ON or OFF. If omitted, the default is OFF.
For Stratix III and Stratix IV device families, with the
OPERATION_MODE parameter set to ZERO_DELAY_BUFFER,
and the USING_FBMIMICBIDIR_PORT parameter is set to
OFF, you must perform the following steps:
1. Instantiate an ALT_IOBUF IP core.
2. Connect the fbout and fbin ports to the o and i ports
of the ALT_IOBUF instantiation, respectively.
3. Connect the bidirectional port of the ALT_IOBUF
instantiation to a bidirectional pin, and set the oe port
of the ALT_IOBUF instantiation to 1.
If the OPERATION_MODE parameter is set to ZERO_DELAY_
BUFFER, and the USING_FBMIMICBIDIR_PORT parameter is
set to ON, connect the fbmimicbidir port to a bidirectional
pin. This pin must be placed on the positive feedback
dedicated output pin of the PLL.
StringUSING_FBMIMICBIDIR_PORT
Specifies the scaling factor, in half-clock cycles, for which
the clock output ports must be locked before the locked
pin goes high.
IntegerVALID_LOCK_MULTIPLIER
Specifies the center value for the VCO pin. Use for
simulation purposes only.
IntegerVCO_CENTER
Specifies the integer division factor for the VCO pin. If
omitted, the default is 0. If VCO_FREQUENCY_CONTROL is set
to MANUAL_PHASE, specify the VCO frequency as a phase
shift step value; that is, one-eighth of the VCO period.
IntegerVCO_DIVIDE_BY
Specifies the integer division factor for the VCO pin. If
omitted, the default is 0. If VCO_FREQUENCY_CONTROL is set
to MANUAL_PHASE, specify the VCO frequency as a phase
shift step value; that is, one-eighth of the VCO period.
Specifies the frequency control value for the VCO pin.
Values are AUTO, MANUAL_FREQUENCY, and MANUAL_PHASE.
If omitted, the default is AUTO.
• AUTO—VCO_MULTIPLY_BY and VCO_DIVIDE_BY values
are ignored and VCO frequency is set automatically.
• MANUAL_FREQUENCY—Specifies the VCO frequency as
a multiple of the input frequency.
• MANUAL_PHASE—Specifies the VCO frequency as a phase
shift step value.
StringVCO_FREQUENCY_CONTROL
Specifies the maximum value for the VCO pin. Use for
simulation purposes only.
IntegerVCO_MAX
ALTPLL (Phase-Locked Loop) IP Core User Guide
Altera Corporation
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ALTPLL Parameters
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2014.08.18
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