High Performance Two Port 10/100 Managed Ethernet Switch with
Datasheet
15.5.2Reset and Configuration Strap Timing
This diagram illustrates the nRST pin timing requirements and its relation to the configuration strap pins and output drive. Assertion of nRST is not a requirement. However, if used, it must be asserted for the minimum period specified. Please refer to Section 4.2, "Resets," on page 36 for additional information.
trstia
nRST
tcss
tcsh
Configuration
Strap Pins
todad
Output Drive
Figure 15.2 nRST Reset Pin Timing
Table 15.6 nRST Reset Pin Timing Values
SYMBOL | DESCRIPTION | MIN | TYP | MAX | UNITS |
|
|
|
|
|
|
trstia | nRST input assertion time | 200 |
|
| μS |
tcss | Configuration strap pins setup to nRST deassertion | 200 |
|
| nS |
tcsh | Configuration strap pins hold after nRST deassertion | 10 |
|
| nS |
todad | Output drive after deassertion | 30 |
|
| nS |
Note: Device configuration straps are latched as a result of nRST assertion. Refer to Section 4.2.4, "Configuration Straps," on page 40 for details.
Revision 1.4 | 444 | SMSC LAN9312 |
| DATASHEET |
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