LAN8710A-EZK-TR SMSC, LAN8710A-EZK-TR Datasheet - Page 28

• Manufacturer Part Number: LAN8710A-EZK-TR
• Description: Ethernet ICs 10/100 Ethernet XCVR w/HPAutoMDIX FlexPwr
• Manufacturer: SMSC
• Type: Single Chipr

Specifications of LAN8710A-EZK-TR

• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Product: Ethernet Transceivers
• Number Of Transceivers: 1
• Standard Supported: IEEE 802.3 or IEEE 802.3u
• Data Rate: 125 Mbps
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 1.6 V or 3 V
• Maximum Operating Temperature: + 85 C
• Package / Case: QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Revision 1.2 (11-10-10)
3.2.4
3.3
Not Used
Not Used
Not Used
Not Used
RXN
RXP
TXN
TXP
Half vs. Full Duplex
Half duplex operation relies on the CSMA/CD (Carrier Sense Multiple Access / Collision Detect)
protocol to handle network traffic and collisions. In this mode, the carrier sense signal, CRS, responds
to both transmit and receive activity. If data is received while the transceiver is transmitting, a collision
results.
In full duplex mode, the transceiver is able to transmit and receive data simultaneously. In this mode,
CRS responds only to receive activity. The CSMA/CD protocol does not apply and collision detection
is disabled.
HP Auto-MDIX facilitates the use of CAT-3 (10BASE-T) or CAT-5 (100BASE-T) media UTP
interconnect cable without consideration of interface wiring scheme. If a user plugs in either a direct
connect LAN cable, or a cross-over patch cable, as shown in
transceiver is capable of configuring the TXP/TXN and RXP/RXN pins for correct transceiver operation.
The internal logic of the device detects the TX and RX pins of the connecting device. Since the RX
and TX line pairs are interchangeable, special PCB design considerations are needed to accommodate
the symmetrical magnetics and termination of an Auto-MDIX design.
The Auto-MDIX function can be disabled via the
Indications
HP Auto-MDIX Support
RJ-45 8-pin straight-through
1
2
3
4
5
6
7
8
for 10BASE-T/100BASE-TX
Direct Connect Cable
Figure 3.4 Direct Cable Connection vs. Cross-over Cable Connection
signaling
Register.
1
2
3
4
5
6
7
8
TXP
TXN
RXP
Not Used
Not Used
RXN
Not Used
Not Used
DATASHEET
Small Footprint MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR
28
Not Used
Not Used
Not Used
Not Used
AMDIXCTRL
RXN
TXN
RXP
TXP
1
2
3
4
5
6
7
8
RJ-45 8-pin cross-over for
10BASE-T/100BASE-TX
Cross-Over Cable
Figure
bit in the
signaling
3.4, the device’s Auto-MDIX
SMSC LAN8710A/LAN8710Ai
Special Control/Status
1
2
3
4
5
6
7
8
TXP
TXN
RXP
Not Used
Not Used
RXN
Not Used
Not Used
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