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ENICSF2811PBKA датащи(PDF) 50 Page - Texas Instruments |
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ENICSF2811PBKA датащи(HTML) 50 Page - Texas Instruments |
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50 / 172 page ![]() X2 X1/XCLKIN On-Chip Oscillator (OSC) PLL Bypass /2 XF_XPLLDIS OSCCLK (PLL Disabled) Latch XPLLDIS XRS PLL 4-Bit PLL Select SYSCLKOUT 1 0 CLKIN CPU 4-Bit PLL Select XCLKIN PLL Block TMS320F2810, TMS320F2811, TMS320F2812 TMS320C2810, TMS320C2811, TMS320C2812 SPRS174T – APRIL 2001 – REVISED MAY 2012 www.ti.com 3.8 OSC and PLL Block Figure 3-9 shows the OSC and PLL block on the F281x and C281x. Figure 3-9. OSC and PLL Block The on-chip oscillator circuit enables a crystal to be attached to the F281x and C281x devices using the X1/XCLKIN and X2 pins. If a crystal is not used, then an external oscillator can be directly connected to the X1/XCLKIN pin and the X2 pin is left unconnected. The logic-high level in this case should not exceed VDD. The PLLCR bits [3:0] set the clocking ratio. 50 Functional Overview Copyright © 2001–2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TMS320F2810 TMS320F2811 TMS320F2812 TMS320C2810 TMS320C2811 TMS320C2812 |
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