UG-1673
Rev. 0 | Page 5 of 29
ON-BOARD EEPROM AND LEDS
The EVAL-ADIN1200FMCZ has two FPGA controllable LEDs
and one unprogrammed, I
2
C EEPROM, U7.
U7 can be programmed with voltage settings to allow the FPGA
board to provide the correct voltages on the supply rails. The
binary write address of the EEPROM is 10100 GA1 GA0 0 and
the read address is 10100 GA1 GA0 1. GA0 and GA1 are nodes
on the schematic for the FMC connector.
There is one LED pin (LED_0) on the
. The LED_0 pin
can be configured in various operating modes using the MDIO
interface dongle (see the
data sheet). By default, the
LED_0 pin LED illuminates when a link is established, and
flashes when there is activity.
The LED_0 pin is a multifunction pin shared with the
PHY_CFG0 function. Therefore, it can be necessary for the
voltage level on the LED_0 pin to be set at a certain value at
power-on and reset to configure the
data sheet for more information on the
multilevel strapping being used as part of the hardware
configuration.
The LED_0 pin has a two-pole rotary switch, S1, to allow easy
configuration for all modes of the PHY_CFG0 pin (as set by S4).
Table 4 describes the configuration of S1 for the appropriate
PHY_CFG0 (S4) pin setting. The LED_0 pin is driven from the
AVDD3P3 supply rail (see Figure 2).
Table 4. S1 Switch Positions
Jumper
S4, PHY_CFG0
S1 Position
JP1
Mode 3 and Mode 4
1
JP2
Mode 1 and Mode 2
2
MODE 3 AND MODE 4
MODE 1 AND MODE 2
R192
100kΩ
R110
0Ω
AVDD3P3
BC817
Q2
1
2
3
S1
LED_0
A
C
DS1
2
3
1
R193
10Ω
R191
0Ω
R43
390Ω
22009-
002
Figure 2. Hardware LED_0 Pin Configuration
MDIO INTERFACE
The MDIO interface dongle can be accessed directly through
the P5 connector to connect the MDIO interface to the PHY.
The MDIO interface dongle also allows interfacing with the
EVAL-ADIN1200FMCZ via the Ethernet PHY software GUI
running on the PC (see Figure 3).
ADIN1200
25MHz
CRYSTAL
POWER
F
MC
CO
NNE
CT
O
R
P3
MDIO
P5
MAGNETICS
RJ45
CONNECTOR
EVAL-ADIN1200FMCZ
OPTIONAL
MDIO INTERFACE
DONGLE
BOOT
STRAP
RESISTOR
MODE
SELECT
LED0
P7
ADuCM3029
FTDI
UART TO USB
USB
EXTERNAL
CLOCK
22009-
003
Figure 3. Simplified Overview of EVAL-ADIN1200FMCZ with MDIO Interface
Dongle Connected
MDIO INTERFACE DONGLE
The MDIO interface dongle is a separate board included in the
EVAL-ADIN1200FMCZ evaluation kit. The MDIO interface
dongle has an on-board
FTDI Chip FT232RQ universal asynchronous receive
transmitter (UART) to USB interface. The schematic for the
MDIO interface dongle is shown in Figure 41. When using the
MDIO interface dongle, connect the USB cable to the MDIO
interface dongle first, then connect the MDIO interface dongle
to the EVAL-ADIN1200FMCZ with the
(see Figure 4).
Using the MDIO interface dongle allows interaction with the
device via the Ethernet PHY software GUI running
on the PC.
P5
USB
HEADER
MDIO
INTERFACE
DONGLE
EVAL-ADIN1200FMCZ
ADuCM3029
22009-
004
Figure 4. MDIO Interface Dongle Connection to the
USB Cable and EVAL-ADIN1200FMCZ
