KSZ8051MLL View Datasheet(PDF) - Micrel
Part Name
Description
Manufacturer
KSZ8051MLL Datasheet PDF : 51 Pages
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Micrel, Inc.
KSZ8051MLL
Back-to-Back Mode – 100Mbps Copper Repeater / Media Converter
Two KSZ8051MLL devices can be connected back-to-back to form a 100Base-TX to 100Base-TX copper repeater.
A KSZ8051MLL and a KSZ8041FTL can be connected back-to-back to provide a low-cost media converter solution.
Media conversion is between 100Base-TX copper and 100Base-FX fiber. On the copper side, link up at 10Base-T is not
allowed, and is blocked during auto-negotiation.
Figure 3. KSZ8051MLL and KSZ8041FTL Back-to-Back Media Converter
MII Back-to-Back Mode (KSZ8051MLL only)
In MII Back-to-Back mode, a KSZ8051MLL interfaces with another KSZ8051MLL, or a KSZ8041FTL to provide a
complete 100Mbps copper repeater, or media converter solution, respectively.
The KSZ8051MLL devices are configured to MII Back-to-Back mode after power-up or reset with the following:
• Strapping pin CONFIG[2:0] (pins 27, 41, 40) set to ‘110’
• A common 25MHz reference clock connected to XI (pin 15)
• MII signals connected as shown in Table 2.
KSZ8051MLL (100Base-TX copper)
[Device 1]
Pin Name
Pin Number
Pin Type
RXC
28
Output
RXDV
27
Output
RXD3
20
Output
RXD2
21
Output
RXD1
22
Output
RXD0
23
Output
TXC
33
Input
TXEN
34
Input
TXD3
39
Input
TXD2
38
Input
TXD1
36
Input
TXD0
35
Input
KSZ8051MLL (100Base-TX copper)
[Device 2]
Pin Name
Pin Number
Pin Type
TXC
33
Input
TXEN
34
Input
TXD3
39
Input
TXD2
38
Input
TXD1
36
Input
TXD0
35
Input
RXC
28
Output
RXDV
27
Output
RXD3
20
Output
RXD2
21
Output
RXD1
22
Output
RXD0
23
Output
Table 2. MII Signal Connection for MII Back-to-Back Mode (100Base-TX Copper Repeater)
July 2010
19
M9999-071210-1.0
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