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MSP430F449IPZ Datasheet(PDF) 47 Page - Texas Instruments |
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MSP430F449IPZ Datasheet(HTML) 47 Page - Texas Instruments |
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47 / 79 page ![]() MSP430x43x1, MSP430x43x, MSP430x44x1, MSP430x44x MIXED SIGNAL MICROCONTROLLER SLAS344G − JANUARY 2002 − REVISED OCTOBER 2009 47 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 typical characteristics VCC(start) VCC V(B_IT−) Brownout Region V(SVSstart) V(SVS_IT−) Software Sets VLD>0: SVS is Active td(SVSR) undefined Vhys(SVS_IT−) 0 1 td(BOR) Brownout 0 1 td(SVSon) td(BOR) 0 1 Set POR Brown- Out Region SVS Circuit is Active From VLD > to VCC < V(B_IT−) SVSOut Vhys(B_IT−) Figure 13. SVS Reset (SVSR) vs Supply Voltage 0 0.5 1 1.5 2 VCC VCC 1 ns 1 ns VCC(drop) t pw tpw − Pulse Width − µs 3 V 1 10 1000 tf tr t − Pulse Width − µs 100 t pw 3 V tf = tr Rectangular Drop Triangular Drop VCC(drop) Figure 14. VCC(drop) With a Square Voltage Drop and a Triangle Voltage Drop to Generate an SVS Signal |
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