EVB-LAN9252-DIG-IO EtherCAT® DIG I/O User’s Guide
DS50002332A-page 16
Preliminary
2014 Microchip Technology Inc.
2.4.1.3.1
Copper Mode
The EVB-LAN9252-DIG-IO is set to Copper Mode by default. Table 2-4 details the
required strap resistor settings for Copper Mode operation.
Additionally, the signal routing resistors detailed in Table 2-5 must be assembled for
Copper Mode operation.
2.4.1.3.2
Fiber Mode
The EVB-LAN9252-DIG-IO supports SFP type 100BASE-FX. To enabled Fiber Mode,
the respective strap and signal routing registers must be configured.
Table 2-6 details the required strap resistor settings for Fiber Mode operation.
Additionally, the signal routing resistors detailed in Table 2-7 must be assembled for
Fiber Mode operation.
TABLE 2-4:
COPPER MODE STRAP RESISTORS
Resistors
Description
R79 (10K)
Configures Port 0 & 1 to Copper Mode
R76, R80 (10K)
Configures Port 0 and Port 1 to Copper Mode, respectively
Note:
R75, R77, and R78 must not be populated (DNP).
TABLE 2-5:
COPPER MODE SIGNAL ROUTING RESISTORS
Resistors
Description
R17, R19, R21, R23
Port 0 Copper Mode enabled
R31, R33, R35, R37
Port 1 Copper mode enabled
Note:
R16, R18, R20, R22, R30, R32, R34, and R36 (0402 package) must not be
populated (DNP).
Note:
Copper Mode related resistors must be DNP while Fiber Mode is active
(See
Section 2.4.1.3.1 “Copper Mode”
TABLE 2-6:
FIBER MODE STRAP RESISTORS
Resistors
Description
R77 (10K)
Configures Port 0 & 1 to FX-LOS Mode
R75, R78 (10K)
Configures Port 0 and Port 1 to Fiber Mode, respectively
Note:
R76, R79, and R80 must not be populated (DNP).
TABLE 2-7:
FIBER MODE SIGNAL ROUTING RESISTORS
Resistors
Description
R16, R18, R20, R22
Port 0 Fiber Mode enabled
R30, R32, R34, R36
Port 1 Fiber mode enabled
Note:
R17, R19, R21, R23, R31, R33, R35, and R37 (0402 package) must not be
populated (DNP).
