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TNETX3150 数据表(PDF) 99 Page - Texas Instruments |
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TNETX3150 数据表(HTML) 99 Page - Texas Instruments |
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99 / 113 page  TNETX3150/TNETX3150A ThunderSWITCH™ 15-PORT 10-/100-MBIT/S ETHERNET™ SWITCH SPWS027F – FEBRUARY 1997 – REVISED SEPTEMBER 1997 99 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 operating characteristics over recommended operating conditions (see Note 12 and Figure 40) read cycle DIO interface NO PARAMETER TNETX3150 TNETX3150A UNIT NO. PARAMETER MIN MAX MIN MAX UNIT 4 tw(SRDY) Pulse duration, SRDY high 20 20 ns 5 td(SRNW) Delay time, from SRDY ↓ to SRNW↓ 0 0 ns 6 td(SAD) Delay time, from SRDY ↓ to SAD1–SAD0 invalid 0 0 ns 7 td(SDATA)1 Delay time from SRDY ↓ to SDATA7–SDATA0 valid 3 2 ns 8 td(SDATA)2 Delay time from SCS ↑ to SDATA7–SDATA0 invalid 0 10 0 60 ns 9 td(SCS–SRDY)1 Delay time, SCS ↓ to SRDY↓ 0 0 ns 10 td(SCS–SRDY)2 Delay time, SCS ↑ to SRDY↑ 0 20 0 60 ns NOTE 12: SRDY should be held high using an external pullup resistor to ensure correct system operation. 9 2 1 5 6 7 4 10 Address Data SCS (input) SRNW (input) SAD1–SAD0 (input) SDATA7–SDATA0 (output) SRDY (output) OSCIN (input) 8 3 Z Z Figure 40. DIO Read Cycle |
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