Texas Instruments BoosterPack C5545, Hardware User'S Manual, Page: 13 / 43

www.ti.com
Introduction to C5545 BoosterPack Board
13 SPRUI90 – September 2016
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
TMS320C5545 BoosterPack Hardware
2.2 Clock Distribution
The board clock distribution circuit is as shown in Figure 5 . Two 12 MHz oscillators are used on board.
One 12 MHz oscillator is connected to the C5545 DSP and the AIC3206 Audio CODEC. The output of
another 12 MHz oscillator is connected to the XDS100.
A 32.768 kHz is connected to the C5545 DSP for the RTC section. The C5545 DSP clock source is
selected by the clock select jumper (J2) to choose between the internal RTC clock (32.768 kHz) or the
external clock (12 MHz). By default, the jumper is mounted and the C5545 DSP to operates with the
internal RTC clock. For more information, see the DSP clock selection shown in
Figure 5 .
Two crystals (32.768 kHz and 24 MHz) are connected to the CC2650.
One 12 MHz crystal is connected to the USB peripheral of the C5545 DSP.
Figure 5. Clock Distribution and DSP Clock Selection