Texas Instruments THUNDER TNETX3270 - Manual (Page 61)

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
fclock (ECLK) Clock frequency, ECLK 98 98 kHz
1 td (ECLKH–EDIOL) Delay time, from ECLK ↑ to EDIO ↓ (see Note 9) 5 5 µ s
2 td (EDIOL–ECLKL) Delay time, from EDIO ↓ to ECLK ↓ (see Note 9) 5 5 µ s
3 td (ECLKL–EDIOX) Delay time, from ECLK
↓
to EDIO changing (see Note 10) 0 0
µ
s
4 td (EDIOV–ECLKH) Delay time, from EDIO valid output to ECLK
↑
0 0
µ
s
5 td (ECLKL–EDIOV) Delay time, from ECLK
↓
to EDIO valid 0 0
µ
s
6 td (ECLKL–EDIOX) Delay time, from ECLK
↓
to EDIO changing (see Note 11) 0 0
µ
s
7 td (ECLKH–EDIOX) Delay time, from ECLK
↑
to EDIO invalid 5 5
µ
s
8 td (EDIOV–ECLKH) Delay time, from EDIO valid input to ECLK ↑ 10 10 µ s
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.
ОООО
ОООО
ООООООО
ООООООО
7
ECLK
(output)
EDIO
(output)
EDIO
(input)
1
6
4
8
Valid
Valid Valid
Valid
5
2 3
Figure 21. EEPROM