realtek single chip 16-port 10/100 ethernet ... - Cornelius-Consult
realtek single chip 16-port 10/100 ethernet ... - Cornelius-Consult
realtek single chip 16-port 10/100 ethernet ... - Cornelius-Consult
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RTL83<strong>16</strong><br />
7.3.2 RMII Timing<br />
Symbol Description Minimum Typical Maximum Units<br />
t1 REFCLK clock period<br />
- 20 - ns<br />
(frequency =50Mhz 50ppm)<br />
t2 REFCLK high level width - <strong>10</strong> - ns<br />
t3 REFCLK low level width - <strong>10</strong> - ns<br />
t4 TXE,TXD to REFCLK rising setup time 4 - - ns<br />
t5 TXE,TXD to REFCLK rising hold time 2 - - ns<br />
t6 CSRDV,RXD to REFCLK rising setup time 4 - - ns<br />
t7 CRSDV,RXD to REFCLK rising hold time 2 - - ns<br />
t1<br />
t2<br />
t3<br />
REFCLK<br />
TXE<br />
t4<br />
t5<br />
TXD[1:0]<br />
TX DATA<br />
RMII Transmit Timing<br />
t1<br />
t2<br />
t3<br />
REFCLK<br />
CRSDV<br />
t6<br />
t7<br />
RXD[1:0]<br />
RX DATA<br />
RMII Receive Timing<br />
2001/11/09 18<br />
Rev.1.72<br />
Tel: +49(0)234-9351135 · Fax: +49(0)234-9351137 E-MAIL: info@cornelius-consult.de http://www.cornelius-consult.de
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