am79c875 Advanced Micro Devices, am79c875 Datasheet - Page 42

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

100 Mbps RMII Receive
Note: CRS_DV[X] is asynchronous at the beginning of receive (1st rising edge of REFCLK), but is synchronous at
the end of receive.
42
t
t
t
RJC100
RCR100
RTC100
Symbol
RXD[X]_[1:0]
RXD[X]_[1:0]
CRS_DV[X]
CRS_DV[X]
REFCLK
REFCLK
Parameter Description
CRS_DV[X] HIGH After First Bit of /J/
RXD[X]_[1:0], CRS_DV[X] Delay After the Rising Edge of
REFCLK
First Bit of /T/ to CRS_DV[X] LOW
RX±
RX±
Figure 22. 100 Mbps RMII Receive Start of Packet Timing
Figure 23. 100 Mbps RMII Receive End of Packet Timing
/T/R/
/J/
t
RTC100
t
RCR100
t
RJC100
Am79C875
t
RCR100
t
Min.
RCR100
120
80
5
Max.
150
190
13
22236G-24
22236G-25
Unit
ns
ns
ns