Datasheet

Table Of Contents
24.3 Block Diagram
Figure 24-1. Block Diagram
Register
Interface
Status &
Statistic
Registers
Control
Registers
FIFO
Interface
AHB DMA
Interface
MAC Transmitter
MAC Receiver
Frame Filtering
MDIO
Media Interface
APB
AHB
Packet Buffer
Memories
24.4 Signal Description
The GMAC includes the following signal interfaces:
MII, RMII to an external PHY
MDIO interface for external PHY management
Slave APB interface for accessing GMAC registers
Master AHB interface for memory access
GTSUCOMP signal for TSU timer count value comparison
Table 24-1. GMAC Connections in Different Modes
Signal Name Function MII RMII
GTXCK Transmit Clock or Reference Clock TXCK REFCK
GTXEN Transmit Enable TXEN TXEN
GTX[3..0] Transmit Data TXD[3:0] TXD[1:0]
GTXER Transmit Coding Error TXER Not Used
GRXCK Receive Clock RXCK Not Used
GRXDV Receive Data Valid RXDV CRSDV
GRX[3..0] Receive Data RXD[3:0] RXD[1:0]
GRXER Receive Error RXER RXER
GCRS Carrier Sense and Data Valid CRS Not Used
GCOL Collision Detect COL Not Used
SAM D5x/E5x Family Data Sheet
GMAC - Ethernet MAC
© 2019 Microchip Technology Inc.
Datasheet
DS60001507E-page 478