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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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AM652X Fiches technique(PDF) 151 Page - Texas Instruments |
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AM652X Fiches technique(HTML) 151 Page - Texas Instruments |
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151 / 277 page  Device OSC1_XO OSC1_XI C f1 Crystal Rd C f2 (Optional) SPRSP08_PCB_CLK_OSC_1 Rbias (Optional) PCB Ground WKUP_OSC0_XI CK0 CK1 CK1 151 AM6548, AM6528, AM6546 AM6526, AM6527 www.ti.com SPRSP08I – NOVEMBER 2017 – REVISED DECEMBER 2019 Submit Documentation Feedback Product Folder Links: AM6548 AM6528 AM6546 AM6526 AM6527 Specifications Copyright © 2017–2019, Texas Instruments Incorporated Table 5-23 details the WKUP_OSC0 input clock timing requirements. Table 5-23. WKUP_OSC0 Input Clock Timing Requirements NAME DESCRIPTION MIN TYP MAX UNIT CK0 1 / tc(WKUP_OSC0_XI) Frequency, WKUP_OSC0_XI 19.2, 20, 24, 25, 26, 27 MHz CK1 tw(WKUP_OSC0_XI) Pulse duration, WKUP_OSC0_XI low or high 0.45 × tc(WKUP_OSC0_XI) 0.55 × tc(WKUP_OSC0_XI) ns tj(WKUP_OSC0_XI) Period jitter, WKUP_OSC0_XI 0.01 × tc(WKUP_OSC0_XI) ns tR(WKUP_OSC0_XI) Rise time, WKUP_OSC0_XI 5 ns tF(WKUP_OSC0_XI) Fall time, WKUP_OSC0_XI 5 ns tj(WKUP_OSC0_XI) Frequency accuracy, WKUP_OSC0_XI Ethernet RGMII and RMII not used ±100 ppm Ethernet RGMII and RMII using derived clock ±50 Figure 5-14. WKUP_OSC0_XI Input Clock 5.9.4.1.3 Auxiliary OSC1 Internal Oscillator Clock Source Figure 5-15 shows the recommended crystal circuit. It is recommended that preproduction printed-circuit board (PCB) designs include the two optional resistors Rbias and Rd in case they are required for proper oscillator operation when combined with production crystal circuit components. In most cases, Rbias is not required and Rd is a 0-Ω resistor. These resistors may be removed from production PCB designs after evaluating oscillator performance with production crystal circuit components installed on preproduction PCBs. Figure 5-15. OSC1 Crystal Implementation |
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