Altera ALTPLL (Phase-Locked Loop) IP Core Bedienungsanleitung PDF herunterladen (Seite 59)

DescriptionTypeParameter

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.

StringSCLKOUT[]_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.

StringSELF_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.

StringSELF_RESET_ON_LOSS_LOCK

Specifies if the VCO is skipped. Values are ON or OFF. If

omitted, the default is OFF.

IntegerSKIP_VCO

Specifies, in picoseconds (ps), the modulation frequency

for spread spectrum. If omitted, the default is 0.

IntegerSPREAD_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.

IntegerSS

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.

IntegerSWITCH_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.

StringSWITCH_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.

StringSWITCH_OVER_ON_LOSSCLK

Specifies the switchover type. Values are AUTO or MANUAL.

If omitted, the default is AUTO.

StringSWITCH_OVER_TYPE

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ALTPLL (Phase-Locked Loop) IP Core User Guide

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ALTPLL Parameters

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2014.08.18

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