LAN9313 datasheet(390/398 Pages) SMSC

390 / 398 page

Three Port 10/100 Managed Ethernet Switch with MII

Datasheet

Revision 1.2 (04-08-08)

390

SMSC LAN9313/LAN9313i

DATASHEET

14.5.2

Reset 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 41 for additional

information.

Note:

Device configuration straps are latched as a result of nRST assertion. Refer to Section 4.2.4,

"Configuration Straps," on page 45 for details.

Figure 14.2 nRST Reset Pin Timing

Table 14.6 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

tcsh

Configuration strap pins hold after nRST deassertion

todad

Output drive after deassertion

tcss

nRST

Configuration

Strap Pins

trstia

tcsh

Output Drive

todad

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