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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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TMS320VC5421 Fiches technique(PDF) 81 Page - Texas Instruments |
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TMS320VC5421 Fiches technique(HTML) 81 Page - Texas Instruments |
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81 / 104 page  Electrical Specifications 81 December 1999 − Revised October 2008 SPRS098D 5.14 Multichannel Buffered Serial Port (McBSP) Timing 5.14.1 McBSP Transmit and Receive Timings The following timing requirements and switching characteristics tables assume testing over recommended operating conditions and H = 0.5tc(CO) (see Figure 5−19 and Figure 5−20). Table 5−21. McBSP T ransmit and Receive Timing Requirements† MIN MAX UNIT tc(BCKRX) Cycle time, BCLKR/X BCLKR/X ext 4H ns tw(BCKRX) Pulse duration, BCLKR/X low or BCLKR/X high BCLKR/X ext 6 ns th(BCKRL-BFRH) Hold time, external BFSR high after BCLKR low BCLKR int 0 ns th(BCKRL-BFRH) Hold time, external BFSR high after BCLKR low BCLKR ext 4 ns th(BCKRL-BDRV) Hold time, BDR valid after BCLKR low BCLKR int 0 ns th(BCKRL-BDRV) Hold time, BDR valid after BCLKR low BCLKR ext 5 ns th(BCKXL-BFXH) Hold time, external BFSX high after BCLKX low BCLKX int 0 ns th(BCKXL-BFXH) Hold time, external BFSX high after BCLKX low BCLKX ext 4 ns tsu(BFRH-BCKRL) Setup time, external BFSR high before BCLKR low BCLKR int 10 ns tsu(BFRH-BCKRL) Setup time, external BFSR high before BCLKR low BCLKR ext 4 ns tsu(BDRV-BCKRL) Setup time, BDR valid before BCLKR low BCLKR int 10 ns tsu(BDRV-BCKRL) Setup time, BDR valid before BCLKR low BCLKR ext 3 ns tsu(BFXH-BCKXL) Setup time, external BFSX high before BCLKX low BCLKX int 10 ns tsu(BFXH-BCKXL) Setup time, external BFSX high before BCLKX low BCLKX ext 6 ns tr(BCKRX) Rise time, BCLKR/X BCLKR/X ext 8 ns tf(BCKRX) Fall time, BCLKR/X BCLKR/X ext 8 ns † Polarity bits CLKRP = CLKXP = FSRP = FSXP = 0. If the polarity of any of the signals is inverted, then the timing references of that signal are also inverted. |
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