Phytec phyFLEX-i.MX 6 - Ethernet Interface

Serial Interfaces
 PHYTEC Messtechnik GmbH 2013 L-773e_2
47
8.4 Ethernet Interface
Connection of the phyFLEX-i.MX 6 to the world wide web or a local
area network (LAN) is possible using the on-board GbE PHY at U11.
It is connected to the RGMII interface of the i.MX 6. The PHY
operates with a data transmission speed of 10 Mbit/s, 100 Mbit/s or
1000 Mbit/s.
8.4.1 Ethernet PHY (U11)
With an Ethernet PHY mounted at U11 the phyFLEX-i.MX 6 has
been designed for use in 10Base-T, 100Base-T and 1000Base-T
networks. The 10/100/1000Base-T interface with its LED signals
extends to the phyFLEX-fix Connector X1.
Pin # Signal ST Voltage Domain Description
X1B24
X_ETH0_ANALOG_
VOLTAGE
REF_O VDD_3V3_LOGIC
ETH0 reference voltage
for 10/100Mbit , for
phyFLEX-i.MX 6 this pin
is only connected to a
100 nF capacitor tied to
ground
X1B26 X
_
ETH0
_
A+/TX0+ ETH
_
O VDD
_
3V3
_
LOGIC ETH0 data A+ /transmit+
X1B27 X_ETH0_A-/TX0- ETH_O VDD_3V3_LOGIC ETH0 data A-/transmit-
X1B28 X_ETH0_LED0 OC VDD_3V3_LOGIC ETH0 link LED output
X1B29 X_ETH0_B+/RX0+ ETH_I VDD_3V3_LOGIC ETH0 data B+/receive+
X1B30 X
_
ETH0
_
B-/RX0- ETH
_
I VDD
_
3V3
_
LOGIC ETH0 data B-/receive-
X1B32 X_ETH0_C+ ETH_I/O VDD_3V3_LOGIC ETH0 data C+ (only GbE)
X1B33 X_ETH0_C- ETH_I/O VDD_3V3_LOGIC ETH0 data C- (only GbE)
X1B34 X_ETH0_LED1 OC VDD_3V3_LOGIC ETH0 traffic LED output
X1B35 X_ETH0_D+ ETH_I/O VDD_3V3_LOGIC ETH0 data D+ (only GbE)
X1B36 X_ETH0_D- ETH_I/O VDD_3V3_LOGIC ETH0 data D- (only GbE)
Table 19: Location of the Ethernet Signals
The on board GbE PHY supports HP Auto-MDIX technology,
eliminating the need for the consideration of a direct connect LAN
cable, or a cross-over patch cable. It detects the TX and RX pins of the
connected device and automatically configures the PHY TX and RX
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