What's does the engineer need to do in order to get the clock signal out of the C5535 from it's PLL. (or some sort of signal out of the clock pin.) They want to route the dsp clock to an external a/d and d/a converter.
Factory Team,
Please see the request below from Americas Sales and Apps. If you choose to post a response here, I will communicate it to the field requestor. If you prefer to contact the field requestor directly, please indicate so in a post and I will close this request in our tracking system.
Thank you,
Todd Price
Americas Sales Support Line
*****************************************************************************************
AFA/FAE Requestor's Information
Date Opened: 8/6/2012 02:33:12 PMCompany Name: Arrow ElectronicsContact Name: Paul JaegerContact Phone: (952) 828-5392Contact Email: pjaeger@arrow.comAddress: 7629 Anagram DrCity and State: Eden Prairie, MNPostal Code: 55344
Customer's Application
GPN: TMS320C5535Non GPN: Application:
dsp request for assistance C5535
Refer to CLKOUT pin in C5535 data manual and TRM.
The CLKOUT pin is enabled/disabled through the CLKOFF bit in the CPU ST3_55 register. When disabled, the CLKOUT pin is placed in high-impedance (Hi-Z). At reset the CLKOUT pin is enabled until the beginning of the boot sequence, when the on-chip Bootloader sets CLKOFF = 1 and the CLKOUT pin is disabled (Hi-Z). For more information on the ST3_55 register, see the TMS320C55x 3.0 CPU Reference Guide (literature number: SWPU073).
Caution as stated in the TRM:
1.4.2.3 CLKOUT PinFor debug purposes, the DSP includes a CLKOUT pin which can be used to tap different clocks within the clock generator. The SRC bits of the CLKOUT control source register (CCSSR) can be used to specify the source for the CLKOUT pin (see Figure 1-8 and Table 1-7).NOTE: There is no internal logic to prevent glitches while changing the CLKOUT source. Also there is no provision for internally dividing down the CLKOUT frequency other than the options inherently available for selecting the CLKOUT source.
Regards.
-------------------------------------------------------------------------------------------------------
Please click the Verify Answer button on this post if it answers your question
--------------------------------------------------------------------------------------------------------