LAN8710 Datasheet, PDF (64/79 Pages) SMSC Corporation – MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR Technology in a Small Footprint

6.4
MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR^® Technology in a Small Footprint
Datasheet
RMII CLKIN Requirements
Table 6.10 RMII CLKIN (REF_CLK) Timing Values
PARAMETER
DESCRIPTION
CLKIN frequency
CLKIN Frequency Drift
CLKIN Duty Cycle
CLKIN Jitter
MIN TYP MAX UNITS
50
MHz
± 50 ppm
40
60
%
150
psec
NOTES
p-p – not RMS
6.5
Reset Timing
nRST
Configuration
Signals
Output drive
T _11.1
T_11.2
T _11.3
T _11.4
Figure 6.10 Reset Timing Diagram
Table 6.11 Reset Timing Values
PARAMETER
DESCRIPTION
T11.1
T11.2
T11.3
T11.4
Reset Pulse Width
Configuration input setup to
nRST rising
Configuration input hold after
nRST rising
Output Drive after nRST rising
MIN TYP MAX UNITS
100
us
200
ns
NOTES
10
ns
20
800
ns
20 clock cycles for
25 MHz clock
or
40 clock cycles for
50MHz clock
Revision 1.0 (04-15-09)
64
DATASHEET
SMSC LAN8710/LAN8710i