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TMS320F28069MPZPQ 数据表(PDF) 37 Page - Texas Instruments |
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TMS320F28069MPZPQ 数据表(HTML) 37 Page - Texas Instruments |
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37 / 185 page  7.13 Clock Specifications 7.13.1 Device Clock Table This section provides the timing requirements and switching characteristics for the various clock options available on the 2806x MCUs. Section 7.13.1.1 lists the cycle times of various clocks. 7.13.1.1 2806x Clock Table and Nomenclature (90-MHz Devices) MIN NOM MAX UNIT SYSCLKOUT tc(SCO), Cycle time 11.11 500 ns Frequency 2 90 MHz LSPCLK(1) tc(LCO), Cycle time 11.11 44.4(2) ns Frequency 22.5(2) 90 MHz ADC clock tc(ADCCLK), Cycle time 22.22 ns Frequency 45 MHz (1) Lower LSPCLK will reduce device power consumption. (2) This is the default reset value if SYSCLKOUT = 90 MHz. 7.13.1.2 Device Clocking Requirements/Characteristics MIN NOM MAX UNIT On-chip oscillator (X1/X2 pins) (Crystal/Resonator) tc(OSC), Cycle time 50 200 ns Frequency 5 20 MHz External oscillator/clock source (XCLKIN pin) — PLL Enabled tc(CI), Cycle time (C8) 33.3 200 ns Frequency 5 30 MHz External oscillator/clock source (XCLKIN pin) — PLL Disabled tc(CI), Cycle time (C8) 11.11 250 ns Frequency 4 90 MHz Limp mode SYSCLKOUT (with /2 enabled) Frequency range 1 to 5 MHz XCLKOUT tc(XCO), Cycle time (C1) 44.44 2000 ns Frequency 0.5 22.5 MHz PLL lock time(1) tp 1 ms (1) The PLLLOCKPRD register must be updated based on the number of OSCCLK cycles. If the zero-pin internal oscillators (10 MHz) are used as the clock source, then the PLLLOCKPRD register must be written with a value of 10,000 (minimum). www.ti.com TMS320F28069, TMS320F28069M, TMS320F28069F, TMS320F28068M, TMS320F28068F TMS320F28067, TMS320F28066, TMS320F28065, TMS320F28064, TMS320F28063 TMS320F28062, TMS320F28062F SPRS698I – NOVEMBER 2010 – REVISED FEBRUARY 2021 Copyright © 2021 Texas Instruments Incorporated Submit Document Feedback 37 Product Folder Links: TMS320F28069 TMS320F28069M TMS320F28069F TMS320F28068M TMS320F28068F TMS320F28067 TMS320F28066 TMS320F28065 TMS320F28064 TMS320F28063 TMS320F28062 TMS320F28062F |
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