88f6282 notes

88f6282  ethernet control 是mac，在soc上了

 

88e116r Ethernet transceiver 是phy，外接的

PHYceiver chip (Realtek RTL8201)

 

The Media Access Control (MAC) data communication protocol sub-layer, also known as the Medium Access Control, is a sublayer of the Data Link Layer specified in the seven-layer OSI model (layer 2). It provides addressing and channel access control mechanisms that make it possible for several terminals or network nodes to communicate within a multi-point network, typically a local area network (LAN) or metropolitan area network (MAN). The hardware that implements the MAC is referred to as a Medium Access Controller.

 

An Ethernet physical transceiver is often called a PHYceiver. It is a device that operates at physical layer of OSI network model.

 

 

• Data Link Layer (Layer 2)
  • LLC (Logical Link Control Sublayer)
  • MAC (Media Access Control Sublayer)
    • RS (Reconciliation Sublayer) - This sublayer processes PHY Local/Remote Fault messages and handles DDR conversion
• PHY Layer (Layer 1)
  • PCS (Physical Coding Sublayer) - This sublayer performs auto-negotiation and coding such as 8b/10b
  • PMA (Physical Medium Attachment Sublayer) - This sublayer performs PMA framing, octet synchronization/detection, and x⁷ + x⁶ + 1 scrambling/descrambling
  • PMD (Physical Medium Dependent Sublayer) - This sublayer consists of a transceiver for the physical medium