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TUSB1210 Datasheet(PDF) 52 Page - Texas Instruments |
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TUSB1210 Datasheet(HTML) 52 Page - Texas Instruments |
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52 / 66 page  TUSB1210 SLLSE09H – NOVEMBER 2009 – REVISED JUNE 2015 www.ti.com 6.2.1.2.3 Unused Pins Connection • VBUS: Input. Recommended to tie to GND if unused. However leaving VBUS floating is also acceptable since internally there is an 80 kOhm resistance to ground. • REFCLK: Input. If REFCLK is unused, and 60 MHz clock is provided by MODEM (60 MHz should be connected to CLOCK pin in this case) then tie REFCLK to GND. • CFG: Tie to GND if REFCLK is 19.2MHz, or tie to VDDIO if REFCLK is 26 MHz. Tie to either GND or VDDIO (doesn't matter which) if REFCLK not used (i.e., ULPI input clock configuration). 6.2.1.3 Application Curve Figure 6-2. High-Speed Eye Diagram 52 Application, Implementation, and Layout Copyright © 2009–2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: TUSB1210 |
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