Status LEDs
Et
h
e
rn
e
t
C
o
n
n
e
ct
o
r
Ma
g
n
e
ti
cs
DP83822
(PHY1)
AMIC110
ETH_TX_D0:3
ETH_RX_D0:3
ETH_TX_EN
ETH_TX_CLK
ETH_RX_DV
ETH_RX_CLK
ETH_RX_ER
ETH_MDC
ETH_MDIO
ETH_RESET
3.3 V
Reset
XI
XO
Status LEDs
Et
h
e
rn
e
t
C
o
n
n
e
ct
o
r
Ma
g
n
e
ti
cs
DP83822
(PHY2)
ETH_TX_D0:3
ETH_RX_D0:3
ETH_TX_EN
ETH_TX_CLK
ETH_RX_DV
ETH_RX_CLK
ETH_RX_ER
ETH_MDC
ETH_MDIO
ETH_RESET
3.3 V
Reset
XI
XO
25 MHz
25 MHz
Copyright © 2017, Texas Instruments Incorporated
Interface Details
8
SPRUIE6 – April 2017
Copyright © 2017, Texas Instruments Incorporated
AMIC110 Industrial Communications Engine (AMIC110 ICE)
2.4
DP83822 – 10/100 Ethernet PHY
The AMIC110 includes two PRU-ICSSs, which can be configured to support numerous industrial
protocols. The PRU subsystem supports two IEEE 802.3 Standard Media Independent Interface (MII)
interfaces, which can be connected to 10/100 Ethernet PHYs. The AMIC110 ICE includes two DP83822
10/100 Ethernet PHYs, which provide two Ethernet connections (see
). The PHYs are
implemented to support dual EtherCAT slave ports.
Figure 7. Ethernet Interface Without Bootstrap Hardware
2.4.1
Industrial Ethernet PHY Default Configuration
The default configuration of the DP83822 is determined using a number of resistor pullup and pulldown
values on specific pins of the PHY. Depending on the values installed, each of the configuration pins can
be set to one of four modes. A configuration pin or groups of configuration pins are used to set the
configuration of the PHY after it is released from reset. Configuration settings differ depending on the
package type selected for the PHY.
