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TNETX3150 数据表(PDF) 59 Page - Texas Instruments |
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TNETX3150 数据表(HTML) 59 Page - Texas Instruments |
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59 / 113 page  TNETX3150/TNETX3150A ThunderSWITCH™ 15-PORT 10-/100-MBIT/S ETHERNET™ SWITCH SPWS027F – FEBRUARY 1997 – REVISED SEPTEMBER 1997 59 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 write cycle timing Following a start condition, the master must output the address of the slave it is accessing. The most-significant four bits of the slave address are those of the device type identifier (see Figure 16). This is fixed as 1010 for all devices. The EEPROM device address must be 000. 0 0 1 1 0 Device Type Identifier 24C02 0 0 R/W Device Address (Least-Significant Bit) Figure 16. Device-Type Identifier and Address The ECLK is an output from the TNETX3150/TNETX3150A. EDIO is an input if the TNETX3150/TNETX3150A is reading the EEPROM or an output if it is written to the EEPROM (see Figures 17 through 19). ECLK Data Change Data Stable EDIO Figure 17. Data Validity ECLK Stop Condition Start Condition EDIO Figure 18. Start and Stop Definition ECLK EDIO (input) Acknowledge Start 18 9 EDIO (output) Figure 19. Acknowledge Response from Receiver |
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