IPR-ED8B10B Altera, IPR-ED8B10B Datasheet - Page 3
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IPR-ED8B10B
Manufacturer Part Number
IPR-ED8B10B
Description
IP CORE Renewal Of IP-ED8B10B
Manufacturer
Altera
Type
MegaCorer
Specifications of IPR-ED8B10B
Software Application
IP CORE, Interface And Protocols, COMMUNICATION
Supported Families
Arria GX, Cyclone, HardCopy, Stratix
Core Architecture
FPGA
Core Sub-architecture
Arria, Cyclone, Stratix
Rohs Compliant
NA
Function
Encoder/Decoder, 8b/10b for Gigabit Ethernet and Fibre Channel
License
Renewal License
Lead Free Status / RoHS Status
na
Lead Free Status / RoHS Status
na
Disparity
Altera Corporation
B
Table 1
Note:
(1)
Disparity is the difference between the number of 1s and 0s in the encoded
word.
I
I
I
The ED8B10B is designed to maintain a neutral average disparity.
Average disparity determines the DC component of a serial line. Running
disparity is a record of the cumulative disparity of every encoded word,
and is tracked by the encoder. To guarantee neutral average disparity, a
positive running disparity must be followed by neutral or negative
disparity; a negative running disparity must be followed by neutral or
positive disparity. If these conditions are not met, the decoder flags an
error by asserting its rderr output.
For details on running disparity rules, see the IEEE 802.3z specification,
paragraph 36.2.4.4.
Table 1. Character Codes
10-Bit Special K Codes
K28.5 is a comma character used for alignment purposes, and to represent the IDLE
code.
Neutral disparity indicates the number of 1s and 0s are equal.
Positive disparity indicates more 1s than 0s.
Negative disparity indicates more 0s than 1s.
lists the special K codes used by the ED8B10B.
8b10b Encoder/Decoder MegaCore Function (ED8B10B) Data Sheet
K28.5
K28.0
K28.1
K28.2
K28.3
K28.4
K28.6
K28.7
K23.7
K27.7
K29.7
K30.7
(1)
Equivalent 8-Bit Codes
8'b000_11100
8'b001_11100
8'b010_11100
8'b011_11100
8'b100_11100
8'b101_11100
8'b110_11100
8'b111_11100
8'b111_10111
8'b111_11011
8'b111_11101
8'b111_11110
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