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OMAP3530 wake-up problem

Lizhe Liu
Prodigy 70 points
Other Parts Discussed in Thread: OMAP3530, TPS65930

Hello,

I am new with OMAP3530 desinging,I am working on PCB desing.

I am trying to get OMAP3530 processor work with my own board.But  I had some problem.Now, the tps65930 chip had provide power and clock to the omap3530.But it seem the processor doesn't work. I tested the SYS_CLKOUT1 and SYS_CLKOUT2 and found there is no singal output. And we also find the problem while we tested JTAG interface.


I guess maybe the OMAP3530 is in inactive mode. so how can I wake up it? I found there is a way to set register to wake it up. But as the JTAG interface does'nt work, I can not program the register to make it use.So my question is: Is there any way for hardware defined to make the processor wake up?

 

Thanks,

Lizhe Liu

 

  • 0
    TI__Guru 63015 points

    The sys_clkout1 and sys_clkout2 pins on the OMAP3530 do not default to clock outputs, so you will not see a clock output on these pins until they have been configured as clock outputs.  

     

    Do you have a high frequency clock source connected to the HFCLKIN pin of the TPS65930?  Did you connect the CLKEN pin of the TPS6530 to the enable pin of the high frequency clock source?  Have you verified the CLKEN signal is high and the clock source is working as expected?

     

    Do you have the sys_clkreq pin of the OMAP3530 connected to the CLKREQ pin of the TPS65930?  Do you have an external pull-down resistor on this signal?  Have you verified the OMAP3530 is sourcing this signal high to request a clock from the TPS65930?

     

    Do you have the HFCLKOUT pin of the TPS65930 connected to the sys_xtalin pin of the OMAP3530?  Have you verified a valid clock signal on the sys_xtalin pin of the OMAP3530?

     

    Do you have the NRESPWRON and NRESWARM pins of the TPS65930 connected to the sys_nrespwron and sys_nreswarm pins of the OMAP3530?  Have you verified the NRESRWRON signal toggle from low to high when the system is powered on?

     

    Regards,

    Paul