ADLINK Technology SMARC LEC-MTK-I1200 - Page 36

LEC-MTK-i1200 User’s Guide SGET SMARC Rev 2.1
Page 36 copyright © 2023 ADLINK Technology Inc.
4.4.5.2 Second LAN (GBE1)
Name
Pin #
Description
I/O
Type
I/O
Level
Power
Domain
PU /
PD
Comments
GBE1_MDI0+
GBE1_MDI0-
GBE1_MDI1+
GBE1_MDI1-
GBE1_MDI2+
GBE1_MDI2-
GBE1_MDI3+
GBE1_MDI3-
S17
S18
S20
S21
S23
S24
S26
S27
Differential Pair Signals for External Transformer
Carrier Series Termination:
Magnetics Module appropriate for 10/100/1000 GBE
transceivers
Carrier Parallel Termination:
Secondary side center tap terminations appropriate for
Gigabit Ethernet implementations
I/IO GBE
MDI
Standby
Gigabit Ethernet Controller 1: Media
Dependent Interface Differential Pairs 0, 1,
2, 3. The MDI can operate in 1000, 100,
and 10Mbit/sec modes. Some pairs are
unused in some modes according to the
following:
1000 100 10
MDI[0]+/- B1_DA+/- TX+/-
TX+/-
MDI[1]+/- B1_DB+/- RX+/-
RX+/-
MDI[2]+/- B1_DC+/-
MDI[3]+/- B1_DD+/-
GBE1_LINK100#
S19
Link Speed Indication LED for GBE 1 100Mbps
O OD
CMOS
3.3V
Standby
Shall be able to sink 24mA or more Carrier
LED current
GBE1_LINK1000#
S22
Link Speed Indication LED for GBE 1 1000Mbps
O OD
CMOS
3.3V
Standby
Shall be able to sink 24mA or more Carrier
LED current
GBE1_LINK_ACT#
S31
Link / Activity Indication LED Driven low on Link (10, 100
or 1000 mbps) Blinks on Activity
O OD
CMOS
3.3V
Standby
Shall be able to sink 24mA or more Carrier
LED current
GBE1_CTREF
S28
Center-Tap reference voltage for Carrier board Ethernet
magnetic `
(if required by the Module GBE PHY)`
Analog
0 to 3.3V
max
Standby
GBE1_SDP
P5
IEEE 1588 Trigger Signal. For hardware implementation
of PTP (precision time protocol)
IO
CMOS
3.3V
Standby
Note
: Second optional LAN port comes from USB 3.1