Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsInterface ICsInterface IC - transceivers RMII 4/4 QFN 24

Table Of Contents

 2016 Microchip Technology Inc. DS00002165B-page 15

LAN8720A/LAN8720AI

TABLE 3-1: 4B/5B CODE TABLE

CODE

GROUP

SYM

RECEIVER

INTERPRETATION

TRANSMITTER

INTERPRETATION

11110 0 0 0000 DATA 0 0000 DATA

01001 1 1 0001 — 1 0001 —

10100 2 2 0010 — 2 0010 —

10101 3 3 0011 — 3 0011 —

01010 4 4 0100 — 4 0100 —

01011 5 5 0101 — 5 0101 —

01110 6 6 0110 — 6 0110 —

01111 7 7 0111 — 7 0111 —

10010 8 8 1000 — 8 1000 —

10011 9 9 1001 — 9 1001 —

10110 A A 1010 — A 1010 —

10111 B B 1011 — B 1011 —

11010 C C 1100 — C 1100 —

11011 D D 1101 — D 1101 —

11100 E E 1110 — E 1110 —

11101 F F 1111 — F 1111 —

11111 I IDLE Sent after /T/R until TXEN

11000 J First nibble of SSD, translated to “0101”

following IDLE, else RXER

Sent for rising TXEN

10001 K Second nibble of SSD, translated to

“0101” following J, else RXER

Sent for rising TXEN

01101 T First nibble of ESD, causes de-assertion

of CRS if followed by /R/, else assertion

of RXER

Sent for falling TXEN

00111 R Second nibble of ESD, causes deasser-

tion of CRS if following /T/, else assertion

of RXER

Sent for falling TXEN

00100 H Transmit Error Symbol Sent for rising TXER

00110 V INVALID, RXER if during RXDV INVALID

11001 V INVALID, RXER if during RXDV INVALID

00000 V INVALID, RXER if during RXDV INVALID

00001 V INVALID, RXER if during RXDV INVALID

00010 V INVALID, RXER if during RXDV INVALID

00011 V INVALID, RXER if during RXDV INVALID