KSZ8873FLLI Micrel Inc, KSZ8873FLLI Datasheet - Page 21

• Manufacturer Part Number: KSZ8873FLLI
• Description: IC ETHERNET SWITCH 3PORT 64LQFP
• Manufacturer: Micrel Inc

Specifications of KSZ8873FLLI

• Controller Type: Ethernet Switch Controller
• Interface: MII
• Voltage - Supply: 1.8V, 2.5V, 3.3V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed
• Other names: 576-3632; KSZ8873FLLI

Micrel, Inc.
Auto-Negotiation
The KSZ8873MLL/FLL/RLL conforms to the auto-negotiation protocol, defined in Clause 28 of the IEEE 802.3u
specification.
Auto-negotiation allows unshielded twisted pair (UTP) link partners to select the best common mode of operation. In auto-
negotiation, link partners advertise their capabilities across the link to each other. If auto-negotiation is not supported or
the KSZ8873MLL/FLL/RLL link partner is forced to bypass auto-negotiation, the KSZ8873MLL/FLL/RLL sets its operating
mode by observing the signal at its receiver. This is known as parallel detection, and allows the KSZ8873MLL/FLL/RLL to
establish link by listening for a fixed signal protocol in the absence of auto-negotiation advertisement protocol.
The link up process is shown in the following flow diagram.
September 2010
Bypass Auto Negotiation
Start Auto Negotiation
and Set Link Mode
Force Link Setting
Yes
Figure 3. Auto-Negotiation and Parallel Operation
Attempt Auto
Negotiation
N
o
Listen for 100BASE-TX
21
Link Mode Set ?
Link Mode Set
Operation
Parallel
Idles
Flow
Join
Yes
Listen for 10BASE-T
Link Pulses
KSZ8873MLL/FLL/RLL
No
M9999-092309-1.2