ICS1893 Datasheet, PDF (129/152 Pages) Integrated Circuit Systems – 3.3-V 10Base-T/100Base-TX Integrated PHYceiver™

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Chapter 10 DC and AC Operating Conditions
10.5.3 Timing for Receive Clock (RXCLK) Pins
Table 10-10 lists the significant time periods for signals on the Receive Clock (RXCLK) pins for the various
interfaces. Figure 10-4 shows the timing diagram for the time periods.
Table 10-10. MII Receive Clock Timing
Time
Period
Parameter
t1 RXCLK Duty Cycle
t2a RXCLK Period
t2b RXCLK Period
t2c RXCLK Period
t2d RXCLK Period
Conditions
Min. Typ. Max. Units
–
35 50 65 %
100M MII (100Base-TX)
– 40 –
ns
10M MII (10Base-T)
– 400 –
ns
100M Symbol Interface (100Base-TX) – 40 –
ns
10M Serial Interface (10Base-T)
– 100 –
ns
Figure 10-4. Receive Clock Timing Diagram
t1
RXCLK
t2
ICS1893 Rev C 6/6/00
Copyright © 2000, Integrated Circuit Systems, Inc.
All rights reserved.
129
June, 2000