SMSC FlexPWR LAN8720 - Manual (Page 64)

Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
Revision 1.0 (05-28-09) 64 SMSC LAN8720/LAN8720i
DATASHEET
6.5 Reset Timing
Figure 6.10 Reset Timing Diagram
Table 6.11 Reset Timing Values
PARAMETER DESCRIPTION MIN TYP MAX UNITS NOTES
T11.1 Reset Pulse Width 100 us
T11.2 Configuration input setup to
nRST rising 200 ns
T11.3 Configuration input hold after
nRST rising 10 ns
T11.4 Output Drive after nRST rising 20 800 ns 20 clock cycles for
25 MHz clock
or
40 clock cycles for
50MHz clock
nRST
Configuration
Signals
T
11.1
T
11.4
O utput drive
T
11.2
T
11.3