Realtek RTL8169 - GMII Timing

RTL8169
2002/03/27 Rev.1.21
89
11.3.5 GMII Timing
RxCLK, GTxCLK
RxD[7:0], RxDV,
RxER, TxD[7:0],
TxEN
Vih_ac(min)
Vih_ac(min)
Vil_ac(max)
Vil_ac(max)
tGCC
tGCH
tGCL
tGSUT
tGSUR
tGHTT
tGHTR
tR
tF
GMII Timing
Symbol Description Min Typical Max Units
Vil_ac Input Low Voltage ac 0.7 V
Vih_ac Input High Voltage ac 1.9 V
fGTxCLK, fRxCLK GTxCLK, RxCLK frequency 125 - 100ppm 125 125 + 100ppm MHz
tGCC GTxCLK, RxCLK Cycle Time 7.5 8 8.5 ns
tGCH GTxCLK, RxCLK High Time 2.5 ns
tGCL GTxCLK, RxCLK Low Time 2.5 ns
tR GTxCLK, RxCLK Rise Time 1 ns
tF GTxCLK, RxCLK Fall Time 1 ns
RSR GTxCLK, RxCLK Rising Slew Rate 0.6 V/ns
FSR GTxCLK, RxCLK Falling Slew Rate 0.6 V/ns
tGSUT
TxD, TxEN Setup to ↑ of GTxCLK
2.5 ns
tGHTT
TxD, TxEN Hold from ↑ of GTxCLK
0.5 ns
tGSUR
RxD, RxDV, RxER Setup to ↑ of RxCLK
2 ns
tGHTR
RxD, RxDV, RxER Hold from ↑ of RxCLK
0 ns
GMII Timing Parameters