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TNETX3270
ThunderSWITCH 24/3 ETHERNET SWITCH
WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS
SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999
61
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
EEPROM interface
operating characteristics over recommended operating conditions (see Figure 21)
NO
PARAMETER
TNETX3150 TNETX3150A
UNIT
NO
.
PARAMETER
MIN MAX MIN MAX
UNIT
f
clock
(ECLK)
Clock frequency, ECLK 98 98 kHz
1 t
d
(ECLKH–EDIOL)
Delay time, from ECLK↑ to EDIO↓ (see Note 9) 5 5 µs
2 t
d
(EDIOL–ECLKL)
Delay time, from EDIO↓ to ECLK↓ (see Note 9) 5 5 µs
3 t
d
(ECLKL–EDIOX)
Delay time, from ECLK↓ to EDIO changing (see Note 10) 0 0 µs
4 t
d
(EDIOV–ECLKH)
Delay time, from EDIO valid output to ECLK↑ 0 0 µs
5 t
d
(ECLKL–EDIOV)
Delay time, from ECLK↓ to EDIO valid 0 0 µs
6 t
d
(ECLKL–EDIOX)
Delay time, from ECLK↓ to EDIO changing (see Note 11) 0 0 µs
7 t
d
(ECLKH–EDIOX)
Delay time, from ECLK↑ to EDIO invalid 5 5 µs
8 t
d
(EDIOV–ECLKH)
Delay time, from EDIO valid input to ECLK↑ 10 10 µs
NOTES: 9. This is a start condition delay time during ECLK high.
10. This is a changing-data condition delay time for output EDIO.
11. This is a changing-data condition delay time for input EDIO.
7
ECLK
(output)
EDIO
(output)
EDIO
(input)
1
6
4
8
Valid
ValidValid
Valid
5
23
Figure 21. EEPROM