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TNETX3150 数据表(PDF) 102 Page - Texas Instruments |
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TNETX3150 数据表(HTML) 102 Page - Texas Instruments |
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102 / 113 page ![]() TNETX3150/TNETX3150A ThunderSWITCH™ 15-PORT 10-/100-MBIT/S ETHERNET™ SWITCH SPWS027F – FEBRUARY 1997 – REVISED SEPTEMBER 1997 102 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 operating characteristics over recommended operating conditions (see Figure 43) EEPROM interface 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 13) 5 5 µs 2 td (EDIOL–ECLKL) Delay time, from EDIO ↓ to ECLK↓ (see Note 13) 5 5 µs 3 td (ECLKL–EDIOX) Delay time, from ECLK ↓ to EDIO changing (see Note 14) 0 0 µs 4 td (EDIOV–ECLKH) Delay time, from EDIO valid output to ECLK ↑ 0 0 µs 5 td (ECLKL–EDIOV) Delay time, from ECLK ↓ to EDIO valid 0 0 µs 6 td (ECLKL–EDIOX) Delay time, from ECLK ↓ to EDIO changing (see Note 15) 0 0 µs 7 td (ECLKH–EDIOX) Delay time, from ECLK ↑ to EDIO invalid 5 5 µs 8 td (EDIOV–ECLKH) Delay time, from EDIO valid input to ECLK ↑ 10 10 µs NOTES: 13. This is a start condition delay time during ECLK high. 14. This is a changing-data condition delay time for output EDIO. 15. This is a changing-data condition delay time for input EDIO. 7 ECLK (output) EDIO (output) EDIO (input) 1 2 5 6 3 4 8 VALID VALID VALID VALID Figure 43. EEPROM Interface Timing |
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