Supporting the Pulse Per Second(PPS) pin of Ethernet AVB.

[GlJe_1688511]

Hello.

I wish to know if the TRAVEO II supports the Pulse Per Second(PPS) pin of ethernet AVB.

Thanks and Best regards.

Glenn.

[GlJe_1688511]

Hello.

I means the AVB PPS Pulse Output pin.

It is for checking the AVB gPTP synchronization.

Thanks and Best regards.

Glenn.

[GlJe_1688511]

Hello

And, Could you explained about ETHx_ETH_TSU_TIMER_CMP_VAL pin?

Thanks and Best regards.

Glenn.

[KumarAP · Accepted solution]

Hi Glenn,

In continuation of last reply, below are more findings : 

• Regarding ETHx_ETH_TSU_TIMER_CMP_VAL pin:
  This signal is asserted high when the upper 70 bits of TSU timer count value are equal to programmed comparison value defined by the following MMIO registers.
  tsu_nsec_cmp[21:0]
  tsu_sec_cmp[31:0]
  tsu_msb_sec_cmp[15:0]
• Regarding supporting the Pulse Per Second(PPS) pin :
  This IP does not support PPS only by HW, because ETHx_ETH_TSU_TIMER_CMP_VAL pin signal triggers only once.
  However, if SW change the programmed comparison value after ETHx_ETH_TSU_TIMER_CMP_VAL is asserted, ETHx_ETH_TSU_TIMER_CMP_VAL pin can be asserted every fixed period.
  If this behavior is fulfilled PPS requirement, it can be used as PPS pin.

Thank you.

Regards,

Apurva

[KumarAP]

Hi Glenn,

As per initial analysis, It is observed that there is no specific Pulse Per Second(PPS) output pin of ethernet AVB.
And ETHx_ETH_TSU_TIMER_CMP_VAL pin is used as "Ethernet time stamp unit timer compare indication line".

I will look more and update you accordingly.

Thank you.

Regards,
Apurva