LAN9303 Datasheet, PDF (363/366 Pages) SMSC Corporation – Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII

Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII
Datasheet
14.5.9 SMI Timing
This section specifies the SMI timing of the device in both master and slave modes. Please refer to
Chapter 9, "MII Data Interface," on page 121 for additional details.
MDC
t_val
t_ohold
MDIO
(Data-Out)
t_clkp
t_clkh t_clkl
t_ohold
t_su t_ihold
MDIO
(Data-In)
Figure 14.14 SMI Timing
Table 14.19 SMI Timing Values
SYMBOL
DESCRIPTION
MIN
t_clkp
t_clkh
t_clkl
t_val
t_ohold
t_su
t_ihold
MDC period
400
MDC high time (slave mode - clock is input)
160 (80%)
MDC high time (master mode - clock is output) 180 (90%)
MDC low time (slave mode - clock is input)
160 (80%)
MDC low time (master mode - clock is output) 180 (90%)
MDIO (slave mode - read from PHY) output
valid from rising edge of MDC
MDIO (master mode - write to PHY) output valid
from rising edge of MDC
MDIO (slave mode - read from PHY) output hold
10
from rising edge of MDC
MDIO (master mode - write to PHY) output hold
50
from rising edge of MDC
MDIO (slave mode - write to PHY) setup time to
10
rising edge of MDC
MDIO (master mode - read from PHY) setup
70
time to rising edge of MDC
MDIO (slave mode - write to PHY) input hold
5
time after rising edge of MDC
MDIO (master mode - read from PHY) input
0
hold time after rising edge of MDC
SMSC LAN9303/LAN9303i
363
DATASHEET
MAX
200
250
UNITS
ns
ns
ns
ns
ns
ns
NOTES
ns
ns
ns
ns
ns
ns
ns
Revision 1.3 (08-27-09)