What is the minimum and maximum pulse width of 1 pps signal output from P2020RDB-PCA and how to set it using prescale value ?

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What is the minimum and maximum pulse width of 1 pps signal output from P2020RDB-PCA and how to set it using prescale value ?

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hammadnayeem
Contributor II

What is the minimum and maximum pulse width of 1 pps signal output from P2020RDB-PCA and how to set it using prescale value in a C program ?

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bpe
NXP Employee
NXP Employee

The duration of pulses on PULSE_OUTn signals is exactly one period of the

1588 adjustable clock. This clock rate depends on several settings and

the input reference clock rate. Details are explained in P2020RM,  Section 14.54.9.

Longest and shortest pulse duration is achieved when TMR_ADD is set to

1 and to 0xffffffff, correspondingly. Note that the value of TMR_ADD

is usually selected based on the requirements to the rate of the local

network-synchronized clock. If the resulting PPS pulse width does not

meet the requirements of your application, adjust it  in an external circuit.


Have a great day,
Platon

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