am79c875 Advanced Micro Devices, am79c875 Datasheet - Page 41

• Manufacturer Part Number: am79c875
• Description: Netphy ?lp Low Power Quad 10/100-tx/fx Ethernet Transceiver
• Manufacturer: Advanced Micro Devices

Independent RMII Mode Signals
100 Mbps RMII Transmit
t
t
t
t
RS100
RH100
RTJ100
TIDLE100
Symbol
TXD[X]_[1:0]
TX_EN[X]
TX_EN[X]
REFCLK
REFCLK
Parameter Description
TX_EN[X], TXD[X]_[1:0] Setup Time to REFCLK Rising Edge
TX_EN[X], TXD[X]_[1:0] Hold time From REFCLK Rising Edge
Transmit Latency TX_EN[X] Sampled by REFCLK to First Bit of /J/
Required De-assertion Time Between Packets
TX±
TX±
Figure 21. RMII 100 Mbps Transmit End of Packet Timing
Figure 20. RMII 100 Mbps Transmit Start of Packet
t
RS100
/T/
Am79C875
t
TIDLE100
t
RTJ100
t
RS100
Min.
120
60
4
2
t
RH100
/J/
/J/
Max.
100
-
-
-
22236G-22
22236G-23
Unit
ns
ns
ns
ns
41