UM0248

ENET overview

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1.2

ENET registers

The ENET registers are divided into two main parts: registers for MAC configuration and

registers for DMA operation and configuration.

The following tables summarize these registers:

Table 1.

ENET MAC registers

Register name

Description

Register main function

ENET_MCR

MAC Control register

MAC Control

ENET_MAH

MAC Address High register

MAC address

ENET_MAL

MAC Address Low register

ENET_MCHA

Multicast Address High register

MAC Multicast address

or

Hash table value

ENET_MCLA

Multicast Address Low register

ENET_MIIA

MII Address register

PHY control:

Read/Write PHY registers

ENET_MIID

MII Data register

ENET_MCF

MII Control Frame register

Control Frame

(Pause Command)

ENET_VL1

VLAN1 register (TAG1 & ID1)

VLAN

TAG & ID

ENET_VL2

VLAN2 register (TAG2 & ID2)

ENET_MTS

MAC Transmission Status register

MAC

Rx & Tx Status Flags

ENET_MRS

MAC Receive Status register

Table 2.

ENET DMA registers

Register name

Description

Register main function

ENET_SCR

DMA Control & status register

DMA general

Control & Status

ENET_IER

DMA Interrupt Enable register

ENET_ISR

DMA Interrupt Status register

ENET_RXSTR

DMA Rx Start register

DMA Rx

Control & Status

ENET_RXCR

DMA Rx Control register

ENET_RXSAR

DMA Rx Start Address register

ENET_RXNDAR

DMA Rx Next Address register

ENET_RXCAR

DMA Rx Current Address register

ENET_RXCTCR

DMA Rx Current Transfer Count

register

ENET_RXTOR

DMA Rx Timeout register

ENET_RXSR

DMA Rx Status register