10 Ethernet interface
When designing in the Ethernet physical device (PHY), the designer should refer to
the datasheet for the PHY. This datasheet usually contains layout advice, connection
schematics, reference design, etc.
The information in the PHY datasheet is mandatory to get optimal performance and
stability.
10.1 Ethernet interface in MII mode
Figure 10-1. Ethernet interface in MII mode example schematic.
Table 10-1. Ethernet interface in MII mode checklist.
Signal name Recommended pin connection
Description
TX_CLK/
REF_CLK
Transmit clock, 25MHz for 100Mb/s data rate
CRS
Carrier sense
COL
Collision detect
MDIO
MDC
PHY maintenance data
PHY maintenance clock
Receive data valid
Receive data 4-bit
RX_DV
RXD[0:3]
16
AVR32768
32157A-AVR-12/10
ATMEL [ ATMEL ]
