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TNETV2840ENGGU 数据表(PDF) 72 Page - Texas Instruments |
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TNETV2840ENGGU 数据表(HTML) 72 Page - Texas Instruments |
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72 / 91 page ![]() Electrical Specifications 72 December 1999 − Revised October 2008 SPRS122F 5.8 General-Purpose Input/Output (GPIO) Timing Table 5−7 and Table 5−8 assume testing over recommended operating conditions (see Figure 5−9). Table 5−7. GPIO Timing Requirements MIN MAX UNIT tsu(GPIO-COH) Setup time, x_GPIOn input valid before CLKOUT high, x_GPIOn configured as general-purpose input. 8 ns th(GPIO-COH) Hold time, x_GPIOn input valid after CLKOUT high, x_GPIOn configured as general-purpose input. 0 ns Table 5−8. GPIO Switching Characteristics PARAMETER MIN MAX UNIT td(COH-GPIO) Delay time, CLKOUT high to x_GPIOn output change. x_GPIOn configured as general-purpose output. 0 6 ns x_GPIOn Input Mode CLKOUT th(GPIO-COH) x_GPIOn Output Mode tsu(GPIO-COH) td(COH-GPIO) Figure 5−9. GPIO Timings |
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