LAN9303 Datasheet, PDF (352/366 Pages) SMSC Corporation – Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII

14.5.3
Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII
Datasheet
Power-On Configuration Strap Valid Timing
This diagram illustrates the configuration strap valid timing requirements in relation to power-on. In
order for valid configuration strap values to be read at power-on, the following timing requirements
must be met.
VDD33IO
Configuration Straps
2.0V
t_cfg
Figure 14.3 Power-On Configuration Strap Latching Timing
SYMBOL
t_cfg
Table 14.8 Power-On Configuration Strap Latching Timing Values
DESCRIPTION
Configuration strap valid time
MIN
TYP
MAX
15
UNITS
mS
Note: Configuration straps must only be pulled high or low. Configuration straps must not be driven
as inputs.
Note: Device configuration straps are also latched as a result of nRST assertion. Refer to Section
14.5.2, "Reset and Configuration Strap Timing," on page 351 and Section 4.2.4, "Configuration
Straps," on page 45 for additional details.
Revision 1.3 (08-27-09)
352
DATASHEET
SMSC LAN9303/LAN9303i