Parameters information for chip SJA1105S.

[mahendrasing_pa]

Hi,

Anyone has information for the below parameters for chip SJA1105S.

We are referring to user manual UM11040.

•  Switch Port Scheduler Predecessor.

        - It defines the order of the scheduler predecessors.
        This value shows only the relative ordering of the elements.
        The highest value has the highest priority and gaps are allowed.

• Switch Port Scheduler Predecessor reference.
       - Choice reference to the scheduler predecessor
       It has one of the choice reference value to the scheduler predecessor.
       It will one of Port FIFO, Port Scheduler or Port Shaper.

• Port Egress Last Scheduler Reference.
  - It is a reference to the port scheduler which is the last in the egress port.

•  Port Ingress Virtual lan Modification
  - It indicates all incoming messages are tagged with VLAN id.

•  Port Traffic Class Assignment
  - The Traffic classes are assigned to the FIFO.

•  Port Egress FIFO Index
  - It specifies the instance ID of the FIFO of the configured Ethernet switch egress port

•  Port FIFO Minimum Length
  - It is the size of a configured FIFO.

• Port FIFO Traffic Class Assignment
  - Traffic classes assigned for the FIFO.
•  Port Egress Predecessor FIFO Reference.

         - It is a reference to FIFO which predecessor to Port Shaper.

• Frame management information
  - Where the management information is inserted inside the Ethernet Frame.

We are not able to map the above configuration parameter related to chipset SJA1105S.

If any has information/suggestion for above will great help for us.

Thanks and Regards,

Mahendra

[bpe]

The parameter identifiers you mentioned  are neither defined nor used
in any NXP documentation related to SJA1105 switch family, including
UM11040. Based on the brief descriptions you provided, with a few exceptions,
the is no  one-to-one mapping between them and anything that can be
configured inside SJA1105S. For  Port Ingress Virtual lan Modification
and  Port Traffic Class Assignment, you can look at UM11040 Sections
5.2.5 and 5.2.3 on how VLAN IDs and priorities are assigned and
managed. For the rest, as has already been said, there are no direct
analogues. If they were  taken from an applicable industry standard
specification, please update the thread with the title of the
document that defines them, I can check if we have any compliance
recommendations. Otherwise, you have to study available SJA1105S
documentation, namely UM11040 and DS420710, to understand the device
operation logic, and analyze how your requirements can be implemented,
if at all.

Regards,

Platon