Altera ALTPLL (Phase-Locked Loop) IP Core User Manual
Page 59
Description
Type
Parameter
Specifies, in picoseconds (ps), the phase shift for the
corresponding
sclkout[1..0]
port. The maximum phase
value is 7/8 of one VCO period. The VCO phase tap is
shared with the corresponding clock output port,
clk[1..0]
, and must have the same phase amount that is
less than one VCO period. In LVDS mode, this parameter
default value is
0
.
String
SCLKOUT[]_PHASE_SHIFT
Specifies if the self-reset on gated-lock-loss feature is used.
Values are
ON
or
OFF
. If omitted, the default is
OFF
.
String
SELF_RESET_ON_GATED_LOSS_LOCK
Specifies if the self-reset on loss lock feature is used. Values
are
ON
or
OFF
. If omitted, the default is
OFF
.
String
SELF_RESET_ON_LOSS_LOCK
Specifies if the VCO is skipped. Values are
ON
or
OFF
. If
omitted, the default is
OFF
.
Integer
SKIP_VCO
Specifies, in picoseconds (ps), the modulation frequency
for spread spectrum. If omitted, the default is
0
.
Integer
SPREAD_FREQUENCY
Specifies the modulus for the spread spectrum counter.
Provides direct access to the internal PLL parameters. If
the
SS
parameter is specified, all advanced parameters must
be used. Values range from
1
to
32768
. If omitted, the
default is
1
.
Integer
SS
Specifies the number of clock cycles to switch the input
clock after the switchover circuit is initiated. Values are
0
through
31
. If omitted, the default is
0
.
Integer
SWITCH_OVER_COUNTER
Specifies whether the gated-lock condition should initiate
a clock switch over. Values are
ON
or
OFF
. If omitted, the
value is
OFF
.
String
SWITCH_OVER_ON_GATED_LOCK
Specifies whether the loss-of-lock condition should initiate
a clock switch over. Values are
ON
or
OFF
. If omitted, the
value is
OFF
.
String
SWITCH_OVER_ON_LOSSCLK
Specifies the switchover type. Values are
AUTO
or
MANUAL
.
If omitted, the default is
AUTO
.
String
SWITCH_OVER_TYPE
Altera Corporation
ALTPLL (Phase-Locked Loop) IP Core User Guide
59
ALTPLL Parameters
ug-altpll
2014.08.18