SMSC LAN9512 4.5.3EEPROM Timing

USB Hub with Integrated 10/100 Ethernet Controller

Datasheet

4.5.3EEPROM Timing

The following specifies the EEPROM timing requirements for LAN9512:

				tcsl
	EECS
	tckcyc		tcklcsl
	tcshckh tckh tckl
	EECLK
	tdvckh	tckhdis	tckldis
	EEDO
	tdsckh	tdhckh
	EEDI
	tcshdv		tdhcsl
EEDI (VERIFY)
	Figure 4.1 EEPROM Timing
	Table 4.5 EEPROM Timing Values
SYMBOL	DESCRIPTION	MIN	TYP	MAX	UNITS
tckcyc	EECLK Cycle time	1110		1130	ns
tckh	EECLK High time	550		570	ns
tckl	EECLK Low time	550		570	ns
tcshckh	EECS high before rising edge of EECLK	1070			ns
tcklcsl	EECLK falling edge to EECS low	30			ns
tdvckh	EEDO valid before rising edge of EECLK	550			ns
tckhdis	EEDO disable after rising edge EECLK	550			ns
tdsckh	EEDI setup to rising edge of EECLK	90			ns
tdhckh	EEDI hold after rising edge of EECLK	0			ns
tckldis	EECLK low to data disable (OUTPUT)	580			ns
tcshdv	EEDIO valid after EECS high (VERIFY)			600	ns
tdhcsl	EEDIO hold after EECS low (VERIFY)	0			ns
tcsl	EECS low	1070			ns

SMSC LAN9512	43	Revision 1.0 (04-20-09)
	DATASHEET