FLLXT1000BA.C4QE000 Intel, FLLXT1000BA.C4QE000 Datasheet - Page 60

• Manufacturer Part Number: FLLXT1000BA.C4QE000
• Manufacturer: Intel

Specifications of FLLXT1000BA.C4QE000

• Lead Free Status / RoHS Status: Not Compliant

LXT1000 — Gigabit Ethernet Transceiver
2.6.3.2
2.6.3.3
2.6.3.4
60
1. The /I/ (Idle) code-group is sent continuously between frames.
2. The /J/ and /K/ (SSD) code-groups are always sent in pairs; /K/ follows /J/.
3. The /T/ and /R/ (ESD) code-groups are always sent in pairs; /R/ follows /T/.
4. An /H/ (Error) code-group is used to signal an error condition.
Standard Data Flow
D0
D1
D2
D3
Code Type
Replaced by
/J/K/ code-groups
Start of Stream
Delimiter (SSD)
Figure 33. 100BASE-TX Frame Structure
Figure 34. 100BASE-TX Data Flow
Table 24. 4B/5B Coding
P0
64-Bit Preamble
P1
(8 Octets)
Parallel
Parallel
Serial
Serial
to
to
Collision Detection
If the LXT1000 is in half-duplex, and it sends and receives a packet at the same time, it asserts its
collisions (COL) output (see
False Carrier Detection
If the LXT1000 detects a false carrier, it asserts RX_ER and drives an “E” (4B) or “0E” (5B) on the
bus.
Error Handling
When the MAC wants to transmit an error, it asserts TX_ER while TX_EN is asserted. The
LXT1000 responds by driving “error” symbols /H/H on the line. If the LXT1000 receives error
symbols on the line in the middle of a packet, it asserts RX_ER and drives an “E” (4B) or “OE”
(5B) on the bus.
P6
0 0 0 0
0 0 0 1
0 0 1 0
Delimiter (SFD)
Start of Frame
4B Code
3 2 1 0
SFD
D0 D1 D2 D3
DA
Address (6 Octets each)
Destination and Source
0
1
2
DA
Name
SA
4B/5B
5B/4B
Figure 37 on page
1 1 1 1 0
0 1 0 0 1
1 0 1 0 0
SA
5B Symbol
4 3 2 1 0
Packet Length
L1
S0 S1 S2 S3 S4
(2 Octets)
L2
(Pad to minimum packet size)
62).
D0
Data 0
Data 1
Data 2
Data Field
D1
Scramble
Scramble
Dn
De-
Frame Check Field
Interpretation
(4 Octets)
CRC
End of Stream Delimiter (EsD)
MLT3
/T/R/ code-groups
Replaced by
pattern: 0, +1, 0, -1, 0, +1...
InterFrame Gap / Idle Code
All transitions must follow
0
I0
No Transition = 0.
Document #: 249276
Transition = 1.
(> 12 Octets)
+1
Rev. Date: 07/20/01
Revision #: 002
Datasheet
0
IFG
-1
0