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TNETA1585 数据表(PDF) 23 Page - Texas Instruments |
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TNETA1585 数据表(HTML) 23 Page - Texas Instruments |
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23 / 32 page ![]() TNETA1585 ATM TRAFFIC MANAGEMENT SCHEDULER DEVICE WITH RECEIVE UTOPIA AND COPROCESSOR INTERFACES SDNS041A – NOVEMBER 1996 – REVISED JULY 1998 23 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 timing requirements (see Figure 6) parameter-memory interface – read operation NO. MIN MAX UNIT 1 tsu(PMDATA) Setup time, PMDATA31–PMDATA0 valid before CLOCK ↑ 3 ns 2 th(PMDATA) Hold time, PMDATA31–PMDATA0 valid after CLOCK ↑ 2 ns operating characteristics over recommended operating conditions (see Figure 6) parameter-memory interface – read operation NO. PARAMETER MIN MAX UNIT 3 td(PMAD) Delay time, from CLOCK ↑ to PMAD15–PMAD0 valid 5 12 ns 4 td(PMOE) Delay time, from CLOCK ↑ to PMOE↓ 5 13 ns PMAD15– PMAD0 (output) PMOE (output) PMWE (output) Valid PMDATA31– PMDATA0 (input) 4 2 Valid 3 H CLOCK (input) 1 Figure 6. Parameter-Memory Interface – Read Operation |
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