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TMS320F280049_018 Datasheet(PDF) 75 Page - Texas Instruments |
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TMS320F280049_018 Datasheet(HTML) 75 Page - Texas Instruments |
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75 / 218 page  75 TMS320F280049, TMS320F280049C TMS320F280048, TMS320F280048C, TMS320F280045 TMS320F280041, TMS320F280041C, TMS320F280040, TMS320F280040C www.ti.com SPRS945C – JANUARY 2017 – REVISED DECEMBER 2017 Submit Documentation Feedback Product Folder Links: TMS320F280049 TMS320F280049C TMS320F280048 TMS320F280048C TMS320F280045 TMS320F280041 TMS320F280041C TMS320F280040 TMS320F280040C Specifications Copyright © 2017, Texas Instruments Incorporated 5.8.3.2.2 Internal Clock Frequencies Table 5-18 provides the clock frequencies for the internal clocks. (1) Lower LSPCLK will reduce device power consumption. The default at reset is SYSCLK/4. Table 5-18. Internal Clock Frequencies MIN NOM MAX UNIT f(SYSCLK) Frequency, device (system) clock 2 100 MHz tc(SYSCLK) Period, device (system) clock 10 500 ns f(VCO) Frequency, PLL VCO (before output divider) 120 400 MHz f(PLLRAWCLK) Frequency, system PLL output (before SYSCLK divider) 15 200 MHz f(PLL) Frequency, PLLSYSCLK 2 100 MHz f(LSP) Frequency, LSPCLK(1) 2 100 MHz tc(LSPCLK) Period, LSPCLK 10 500 ns f(OSCCLK) Frequency, OSCCLK (INTOSC1 or INTOSC2 or XTAL or X1) See respective clock MHz f(HRPWM) Frequency, HRPWMCLK 60 100 MHz (1) A load of 40 pF is assumed for these parameters. (2) H = 0.5tc(XCO) 5.8.3.2.3 Output Clock Frequency and Switching Characteristics Table 5-19 lists the switching characteristics of the output clock, XCLKOUT. Table 5-19. XCLKOUT Switching Characteristics(1)(2) over recommended operating conditions (unless otherwise noted) PARAMETER MIN MAX UNIT tf(XCO) Fall time, XCLKOUT 5 ns tr(XCO) Rise time, XCLKOUT 5 ns tw(XCOL) Pulse duration, XCLKOUT low H – 2 H + 2 ns tw(XCOH) Pulse duration, XCLKOUT high H – 2 H + 2 ns f(XCO) Frequency, XCLKOUT 50 MHz |
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