PCM4L datasheet(19/38 Pages) RENESAS

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R31DS0087EU0101 Rev.1.01

Page 19

Sep.28.21

pcm4l Datasheet

qualificationTimeoutSeconds

900

Timeout value for the qualification timer.

Valid values: {0 - 31,536,000} in seconds

holdover

N/A

This group includes the clock holdover settings. Based on these values, the

servo decides how to transition the DCO on loss of all PTP references.

▪ enable: Enable/Disable holdover

▪ holdoverType: {Software, Hardware} Select to use Software or Hardware

control for holdover

▪ holdoverTimeoutSeconds: {int} How long in seconds to remain “in-spec” and

transient to “out-of-spec”

▪ unqualifiedTimeoutSeconds: {int} How long in seconds to remain “out-of-

spec” and return to unqualified state

▪ outOfSpecUserDefinedFrequencyOffsetEnable: Enable/disable the use of a

user defined FFO when entering out-of-spec.

▪ outOfSpecUserDefinedFrequencyOffsetPpb: {int} Value of FFO in ppb to set

the DCO

Table 6. Profile Configuration Parameters

JSON Identifier

Default

Description

physicalPllClockCategory

Specifies the ITU-T G.781 Quality Level (QL) of the physical clock. This value is

used to determine the suitability of the physical clock as a valid reference and

can be used to determine the IEEE 1588 frequency traceable flag.

Used in conjunction with physicalPllClockCategoryThreshold to determine

suitability of the physical PLL clock as reference.

1 = Category 1 frequency source (QL-PRC / QL-PRS)

2 = Category 2 frequency source (QL-SSU-A / QL-ST2)

3 = Category 3 frequency source (QL-SSU-B / QL-ST3E)

4 = Category 4 frequency source (QL-EEC1 / QL-EEC2)

5 = Do Not Use (i.e. not to be used as reference).

physicalPllClockCategoryThr

eshold

Specifies the clock category threshold to trigger the restoration of the physical

clock as a valid reference.

physicalPllInstance

This is used to enable/disable combo mode based on the

physicalPllClockCategory and physicalPllClockCategoryThreshold that is

changed during run-time externally by management API.

physicalPllWaitToRestoreTi

meoutValue

When the traceability is restored (i.e., when the QL moves from a lower level to

a higher level and the QL is equal to or higher than a specified threshold), a wait-

to-restore mechanism is implemented before restoring the physical layer

connection.

This parameter sets the restoration delay.

Valid values: {0 - 100} In seconds. 0 means no delay.

applyPhaseSlopeLimitInLock

edStates

Configures whether a correction is phase slope limited when in locked state.

0 = Do not apply phase slope limit in locked state.

1 = Apply phase slope limit when in locked state.

Table 5. Device Configuration Parameters

JSON Identifier

Default

Description

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