10.8 Interfacing with an Ethernet PHY

The SAMA7G54 SOM Series embeds two separate Ethernet MAC interfaces: one Gigabit Ethernet MAC (GMAC0) and one 10/100 Ethernet MAC (GMAC1). The two interfaces can be used at the same time.

For more information about the Ethernet interface features, refer to the SAMA7G5 Series SiP data sheet (see Reference Documents).

Table 10-42. Gigabit Ethernet MAC (GMAC0) Interface Configuration
Interface InstanceIO SetPin No.Pin NameFunction
GMAC01180PA15Transmit Enable or Transmit Control Signal
179PA16Transmit Data 0
174PA17Transmit Data 1
177PA18Receive Data Valid or Carrier Sense and Data Valid or Receive Control Signal
182PA19Receive Data 0
175PA20Receive Data 1
178PA21Receive Error
176PA22Management Data Clock
184PA23Management Data Input/Output
183PA24Transmit Clock or 50 MHz Reference Clock
181PA25125 MHz Clock
185PA26Transmit Data 2
186PA27Transmit Data 3
187PA28Receive Data 2
188PA29Receive Data 3
3PA30Receive Clock
4PA31Transmit Coding Error
7PB0Collision Detect
5PB1Carrier Sense
6PB2TSU Timer Comparison Valid
Table 10-43. 10/100 Ethernet MAC (GMAC1) Interface Configuration
Interface InstanceIO SetPin No.Pin NameFunction
GMAC1126PD21Transmit Clock or 50 MHz Reference Clock
27PD22Transmit Data 0
28PD23Transmit Data 1
32PD24Receive Data Valid or Carrier Sense and Data Valid or Receive Control Signal
30PD25Receive Data 0
36PD26Receive Data 1
34PD27Receive Error
35PD28Management Data Clock
33PD29Management Data Input/Output
31PD30Transmit Clock or 50 MHz Reference Clock
37PD31Transmit Data 2
44PE0Transmit Data 3
45PE1Receive Data 2
47PE2Receive Data 3
46PE3Receive Clock
49PE4Transmit Coding Error
48PE5Collision Detect
50PE6Carrier Sense