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MSP430F423AIPM 数据表(PDF) 22 Page - Texas Instruments |
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MSP430F423AIPM 数据表(HTML) 22 Page - Texas Instruments |
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22 / 45 page ![]() MSP430F42xA MIXED SIGNAL MICROCONTROLLER SLAS587 -- FEBRUARY 2008 22 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics over recommended operating free-air temperature (unless otherwise noted) (continued) 0 1 V VCC(start) Vhys(B_IT--) VCC td(BOR) (B_IT--) Figure 6. POR/Brownout Reset (BOR) vs Supply Voltage 0 0.5 1 1.5 2 0.001 1 1000 V= 3 V Typical Conditions 1ns 1ns tpw -- Pulse Width -- μstpw -- Pulse Width -- μs cc VCC 3V VCC(drop) tpw Figure 7. VCC(drop) Level With a Square Voltage Drop to Generate a POR/Brownout Signal VCC 3V VCC(drop) tpw 0 0.5 1 1.5 2 tpw -- Pulse Width -- μs 0.001 1 1000 tf tr tpw -- Pulse Width -- μs tf= tr V= 3 V Typical Conditions cc Figure 8. VCC(drop) Level With a Triangle Voltage Drop to Generate a POR/Brownout Signal |
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