KSZ8841-16MBLI Micrel Inc, KSZ8841-16MBLI Datasheet - Page 31
KSZ8841-16MBLI
Manufacturer Part Number
KSZ8841-16MBLI
Description
IC MAC CTRLR 8/16BIT 128LQFP
Manufacturer
Micrel Inc
Datasheet
1.KSZ8841-16MBL.pdf
(105 pages)
Specifications of KSZ8841-16MBLI
Controller Type
Ethernet Controller, MAC
Interface
Bus
Voltage - Supply
3.1 V ~ 3.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
*
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Auto Negotiation
The KSZ8841M conforms to the auto negotiation protocol as described by the 802.3 committee to allow the port to
operate at either 10Base-T or 100Base-TX.
Auto negotiation allows unshielded twisted pair (UTP) link partners to select the best common mode of operation. In auto
negotiation, the link partners advertise capabilities across the link to each other. If auto negotiation is not supported or the
link partner to the KSZ8841M is forced to bypass auto negotiation, the mode is set by observing the signal at the receiver.
This is known as parallel mode because while the transmitter is sending auto negotiation advertisements, the receiver is
listening for advertisements or a fixed signal protocol.
The link setup is shown in the following flow diagram (Figure 9).
October 2007
Micrel, Inc.
B y p a s s A u t o N e g o t i a t i o n
Start Auto Negotiation
Force Link Setting
and Set Link Mode
YES
NO
Figure 9. Auto Negotiation and Parallel Operation
Attempt Auto
Negotiation
Listen for 100BASE-TX
31
Link Mode Set ?
Link Mode Set
Operation
Join Flow
Parallel
Idles
YES
NO
Listen for 10BASE-T L i n k
Pulse s
KSZ8841-16/32 MQL/MVL/MBL
M9999-102207-1.6
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