DA82562ET Intel, DA82562ET Datasheet - Page 14

• Manufacturer Part Number: DA82562ET
• Manufacturer: Intel

Specifications of DA82562ET

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.45V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 48
• Lead Free Status / RoHS Status: Not Compliant

82562ET — Networking Silicon
4.1.1.2
10
100BASE-TX Scrambler and MLT-3 Encoder
Data is scrambled in 100BASE-TX in order to reduce electromagnetic emissions during long
transmissions of high-frequency data codes. The scrambler logic accepts 5 bits from the 4B/5B
encoder block and presents the scrambled data to the MLT-3 encoder. The 82562ET implements
the 11-bit stream cipher scrambler as adopted by the ANSI XT3T9.5 committee for UTP operation.
The cipher equation used is:
The MLT-3 encoder receives the scrambled Non-Return to Zero (NRZ) data stream from the
scrambler and encodes the stream into MLT-3 for presentation to the driver. MLT-3 is similar to
NRZ1 coding, but three levels are output instead of two. The three output levels are positive,
Symbol
C
D
R
H
A
B
E
F
K
T
V
V
V
V
V
V
V
V
V
V
6
7
8
9
J
I
X[n] = X[n-11] + X[n-9] (mod 2)
5B Symbol Code
10010
10001
00000
00001
00010
00100
00101
01000
10000
01110
10011
10110
10111
11010
11011
11100
11101
11000
01101
00111
00011
00110
01100
11001
01111
11111
Inter Packet Idle Symbol
(No 4B)
1st Start of Packet Symbol
0101
2nd Start of Packet Symbol
0101
1st End of Packet Symbol
2nd End of Packet Symbol
and Flow Control
INVALID
INVALID
INVALID
INVALID
INVALID
INVALID
INVALID
INVALID
INVALID
Flow Control S
INVALID
4B Nibble Code
1000
1001
1010
0110
0111
1011
1100
1101
1110
1111
Datasheet