Altera ALTPLL (Phase-Locked Loop) IP Core User Manual
Page 49
Description
Type
Parameter
Specifies the output clock port which should be
compensated for.
• If the
OPERATION_MODE
parameter is set to normal
mode, the values are
CLK[]
,
GCLK[]
,
LCLK[]
, or
LVDSCLK[]
. Default is
CLK0
.
• If the
OPERATION_MODE
parameter is set to zero-delay
buffer mode, value is
EXTCLK[]
. Default is
EXTCLK0
.
• If the
OPERATION_MODE
parameter is set to source-
synchronous mode, the values are
CLK[]
,
LCLK[]
,
GCLK[]
, or
LVDSCLK[]
. This clock cannot be offset with
respect to the reference clock. This relationship is
preserved closely even upon temperature and frequency
changes.
String
COMPENSATE_CLOCK
Specifies the down spectrum percentage. Values range from
0
through
0.5
.
String
DOWN_SPREAD
Specifies the high period count for the corresponding
E[3..0]
counter. Values range from
1
through
512
. If
omitted, the default is
1
.
Integer
E[]_HIGH
Specifies the initial value for the corresponding
E[3..0]
counter. Values range from
1
through
512
. If omitted, the
default is
1
.
Integer
E[]_INITIAL
Specifies the low period count for the corresponding
E[3..0]
counter. Values range from
1
through
512
. If
omitted, the default is
1
.
Integer
E[]_LOW
Specifies the mode for the corresponding
E[3..0]
counter.
Values are
BYPASS
,
ODD
, or
EVEN
. If omitted, the default is
BYPASS
.
String
E[]_MODE
Specifies the phase tap for the corresponding
E[3..0]
counter. Values range from
0
through
7
. If omitted, the
default is
0
.
Integer
E[]_PH
Specifies, in nanoseconds (ns), the time delay for the
corresponding
E[3..0]
counter. Values range from
0
ns
to
3
ns. If omitted, the default is
0
.
String
E[]_TIME_DELAY
Specifies the counter for the corresponding
ENABLE[1..0]
port. Values are
L0
or
L1
.
String
ENABLE[]_COUNTER
Specifies whether to use the switchover counter. Values
are
ON
or
OFF
. If omitted, the value is
OFF
.
String
ENABLE_SWITCH_OVER_COUNTER
Altera Corporation
ALTPLL (Phase-Locked Loop) IP Core User Guide
49
ALTPLL Parameters
ug-altpll
2014.08.18