SMSC LAN9500, LAN9500i 4.5.3Reset and Configuration Strap Timing

Hi-Speed USB 2.0 to 10/100 Ethernet Controller

Datasheet

4.5.3Reset and Configuration Strap Timing

Figure 4.3 illustrates the nRESET pin timing requirements and its relation to the configuration strap pins and output drive. Assertion of nRESET is not a requirement. However, if used, it must be asserted for the minimum period specified.

trstia

nRESET

tcsstcsh

Configuration

Strap Pins

todad

Output Drive

Figure 4.3 nRESET Reset Pin Timing

Table 4.10 nRESET Reset Pin Timing Values

SYMBOL	DESCRIPTION	MIN	TYP	MAX	UNITS
trstia	nRESET input assertion time	1			uS
tcss	Configuration strap pins setup to nRESET deassertion	200			nS
tcsh	Configuration strap pins hold after nRESET deassertion	10			nS
todad	Output drive after deassertion	30			nS

SMSC LAN9500/LAN9500i	35	Revision 1.7 (10-02-08)
	DATASHEET