TLK1201RCP, TLK1201IRCP

ETHERNET TRANSCEIVERS

SLLS506D − AUGUST 2001 − REVISED AUGUST 2004

15

POST OFFICE BOX 655303

APPLICATION INFORMATION

8B/10B transmission code (continued)

The 8b/10b transmission code uses letter notation describing the bits of an unencoded information octet. The

bit notation of A,B,C,D,E,F,G,H for an unencoded information octet is used in the description of the 8b/10b

transmission code-groups, where A is the LSB. Each valid code group has been given a name using the

following convention: /Dx.y/ for the 256 valid data code-groups and /Kx.y/ for the special control code-groups,

where y is the decimal value of bits EDCBA and x is the decimal value of bits HGF (noted as K<HGF.EDCBA>).

Thus, an octet value of FE representing a code-group value of K30.7 would be represented in bit notation as

111 11110.

_

+

VDD

GND

5 k

Ω

7.5 k

Ω

RXP

RXN

GND

5 k

Ω

7.5 k

Ω

VDD

ZO

ZO

ZO

ZO

TXP

TXN

Transmitter

Media

Receiver

Figure 10. High-Speed I/O Directly-Coupled Mode

_

+

VDD

GND

5 k

Ω

7.5 k

Ω

RXP

RXN

GND

5 k

Ω

7.5 k

Ω

VDD

ZO

ZO

ZO

ZO

TXP

TXN

Transmitter

Media

Receiver

Figure 11. High-Speed I/O AC-Coupled Mode