LAN9303 Datasheet, PDF (361/366 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
14.5.8 RMII Interface Timing
This section specifies the RMII interface timing for P0_OUTCLK input and output modes. Please refer
to Chapter 9, "MII Data Interface," on page 121 for additional details.
P0_OUTCLK
(output)
t_clkp
t_clkh t_clkl
t_val
t_val
t_ohold
P0_OUTD[1:0]
P0_OUTDV
t_ohold
t_su t_ihold
t_su t_ihold
t_val
t_ihold
P0_IND[1:0]
t_ihold
t_su
P0_INDV
Figure 14.12 RMII P0_OUTCLK Output Mode Timing
Table 14.17 RMII P0_OUTCLK Output Mode Timing Values
SYMBOL
DESCRIPTION
t_clkp
t_clkh
t_clkl
t_val
t_ohold
t_su
t_ihold
P0_OUTCLK period
P0_OUTCLK high time
P0_OUTCLK low time
P0_OUTD[1:0], P0_OUTDV output valid from
rising edge of P0_OUTCLK
P0_OUTD[1:0], P0_OUTDV output hold from
rising edge of P0_OUTCLK
P0_IND[1:0], P0_INDV setup time to rising edge
of P0_INCLK
P0_IND[1:0], P0_INDV input hold time after
rising edge of P0_INCLK
MIN
20
t_clkp*0.4
t_clkp*0.4
2.0
4.0
1.5
MAX
t_clkp*0.6
t_clkp*0.6
14.0
UNITS NOTES
ns
ns
ns
ns Note 14.20
ns Note 14.20
ns Note 14.20
ns Note 14.20
Note 14.20 Timing was designed for system load between 10 pf and 25 pf.
SMSC LAN9303/LAN9303i
361
DATASHEET
Revision 1.3 (08-27-09)