• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 98 subscribers
  • Views 287 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

OMAP L138 clock output option

Arul jothi
Prodigy 150 points
Other Parts Discussed in Thread: OMAPL138, TLV320AIC12K

Hi,

         We are in the design phase of a handheld device with OMAP L138.

We are planning to derive an FPGA and TLV320AIC12K from the output clock of OMAPL138. Input clock source for OMAP is 24 Mhz.

My questions:

1.is it ok to feed the clock out (OBSCLK) to both FPGA and TLV320AIC12K with some buffer.

2. Is is ok to feed 24 Mhz instead of 24.5 Mhz for the chip TLV320AIC12K. The LogicPD reference design uses separate 24.5 Mhz clock.

3. Any other clock output possible from L138 processor as we have to give the clock to 2 chips (FPGA and voice codec)

Thanks

Arul.



  • 0
    TI__Mastermind 27585 points

    1) Yes thats ok. Use the IBIS models to simulate the system to be sure

    2) Yes it is ok, but you will not be able to sample at the standard sampling frequencies such as 48KHz or 96KHz.

    3) Again to get the 48KHz you would need the external crystal. Otherwise you can source the clock form the McASP module itself, which will be a divide down of the system clock.

    Jeff