i.MX6UL PHY management interface

[ko-hey]

Hi all

I have a question about "MDIO frame field".

I know i.MX6UL PHY management interface follows the standard MDIO specification(IEEE 802.3 Clause 22) and i.MX6UL has only following opcode type of operation.

Opcode defines type of operation. Programmed with ENETn_MMFR[OP].
01 Write operation
10 Read operation

From the RM, I understand "00" and "11" have never defined.
On the other hand, some Ethernet IC has "00" opcode type of operation.

Can I use "00" and "11" settings in i.MX6UL ?　Please tell me both of the answer and reason.

Did NXP test the "00" and "11" setting in i.MX6UL ?

Ko-hey

[igorpadykov · Accepted solution]

Hi Ko-hey

according to MDIO specification IEEE 802.3 Clause 22 defines only

01 Write operation
10 Read operation

http://www.ieee802.org/3/efm/public/sep01/turner_1_0901.pdf 

http://www.ieee802.org/3/efm/public/nov02/oam/pannell_oam_1_1102.pdf 

IEEE 802.3 Clause 45 uses also "00" and "11" settings, as

described in sect.22.6.17.2 MDIO clause 45 frame format

i.MX6UL Reference Manual

http://cache.freescale.com/files/32bit/doc/ref_manual/IMX6ULRM.pdf

Best regards
igor
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[ko-hey]

Hi Igor

I know the specification defines only "01" and "10".

From you answer, NXP have never tested the settings of "00" and "11".

Is my guess correct ?

Ko-hey

[igorpadykov]

Hi Ko-hey

yes correct.

Best regards
igor

[ko-hey]

Thanks!

ko-hey