LAN9311-NZW Standard Microsystems (SMSC), LAN9311-NZW Datasheet - Page 84

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LAN9311-NZW

Manufacturer Part Number
LAN9311-NZW
Description
Manufacturer
Standard Microsystems (SMSC)
Datasheet

Specifications of LAN9311-NZW

Number Of Primary Switch Ports
2
Internal Memory Buffer Size
32
Operating Supply Voltage (typ)
3.3V
Fiber Support
No
Integrated Led Drivers
Yes
Phy/transceiver Interface
MII
Power Supply Type
Analog
Data Rate (typ)
10/100Mbps
Vlan Support
Yes
Operating Temperature (max)
70C
Operating Temperature (min)
0C
Pin Count
128
Mounting
Surface Mount
Jtag Support
No
Operating Supply Voltage (max)
3.6V
Operating Supply Voltage (min)
3V
Operating Temperature Classification
Commercial
Data Rate
100Mbps
Lead Free Status / RoHS Status
Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LAN9311-NZW
Manufacturer:
Standard
Quantity:
2
Part Number:
LAN9311-NZW
Manufacturer:
Microchip Technology
Quantity:
10 000
Revision 1.7 (06-29-10)
7.2.1
7.2.1.1
7.2.1.2
Port x
MAC
Converter
NRZI
100BASE-TX Transmit
The 100BASE-TX transmit data path is shown in
internal to the PHY. Each major block is explained in the following sections.
MII MAC Interface
For a transmission, the switch fabric MAC drives the transmit data to the PHYs MII MAC Interface.
The MII MAC Interface is described in detail in
Note: The PHY is connected to the switch fabric MAC via standard MII signals. Refer to the IEEE
4B/5B Encoder
The transmit data passes from the MII block to the 4B/5B Encoder. This block encodes the data from
4-bit nibbles to 5-bit symbols (known as “code-groups”) according to
is mapped to 16 of the 32 possible code-groups. The remaining 16 code-groups are either used for
control information or are not valid.
The first 16 code-groups are referred to by the hexadecimal values of their corresponding data nibbles,
0 through F. The remaining code-groups are given letter designations with slashes on either side. For
example, an IDLE code-group is /I/, a transmit error code-group is /H/, etc.
RJ45
MII 25 MHz by 4 bits
MII Transmit Clock
802.3 specification for additional details.
NRZI
Internal
Internal
MLT-3
Converter
MLT-3
Figure 7.2 100BASE-TX Transmit Data Path
MII MAC
Interface
CAT-5
100M
PLL
MLT-3
DATASHEET
125 Mbps Serial
MLT-3
by 4 bits
84
25MHz
Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
TX Driver
100M
Section 7.2.7, "MII MAC
Figure
Encoder
4B/5B
7.2. Shaded blocks are those which are
MLT-3
Table
25MHz by
Magnetics
5 bits
Interface".
7.2. Each 4-bit data-nibble
SMSC LAN9311/LAN9311i
Scrambler
and PISO
Datasheet

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