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General Documentation for Ethernet PHY registers

Question asked by naphtali on Mar 7, 2017
Latest reply on Mar 7, 2017 by Clive One

I am working on a board (STM32F407VGTx) that has an older PHY chip KSZ8721BL. I have similar code running on the MCBSTM32F400 (v1.2) which has an KSZ8081RNA. In testing, I retrieved all of the registers from both PHY chips and am comparing them. My problem is that I cannot find sufficient information online about how to think about each register bit. Does anyone know where I can find what I need?

 

For Reference:

 

8721:

NameValue
Basic Control Register0x1000
Basic Status Register0X786D
PHY Identifier 10X0022
PHY Identifier 20X1619
Auto-Negotiation Advertisement Register0X01E1
Auto-Negotiation Link Partner Ability Register0XCDE1
Auto-Negotiation Expansion Register0X000F
Auto-Negotiation Next Page Register0X2001
Link Partner Next Page Ability0XCDE1
RXER Counter Register0X0000
Interrupt Control/Status Register0X0000
100Base-TX PHY Control Register0X1198

 

 

8081:

NameValue
Basic Control Register0X1000
Basic Status Register0X786D
PHY Identifier 10X0022
PHY Identifier 20X1560
Auto-Negotiation Advertisement Register0X81E1
Auto-Negotiation Link Partner Ability Register0XCDE1
Auto-Negotiation Expansion Register0X000D
Auto-Negotiation Next Page Register0X2001
Link Partner Next Page Ability0X4006
Digital Reserved Control Register0X0000
AFE Control Register 10X0000
RXER Counter Register0X0000
Operation Mode Strap Override0X0002
Operation Mode Strap Status0X0402
Expanded Control0X0801
Interrupt Control/Status Register0X0000
LinkMD Control/Status Register0X0000
PHY Control Register 10X0136
PHY Control Register 20X8100

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