No clock signal on CC3200 test board

Hi

Can you flash the device?

If not, please make sure sRESET pin is asserted and check for the following:

Activity on SF CLK pin

Voltage level on VDD_ANA and VCC_DIG.

Ben

Hi

Thank you for your answer.

I was confirm that reset signal is correct and checked for the following:

SF CLK pin is no signal(0V).

VDD_ANA and VCC_DIG make the pulse signal likes attached image.

I found something for experiments.

When I removed bypass capacitors(C1381, C1481, C1361, C1251) that connected VDD_ANA and VDD_DIG on my circuit, the clock pulse was working.

And I had tried to format by Uniflash, but failed. 

Thank you, Ben.

Best.

I made test board by myself.

I connected all of pins by CC3200 launchpad schematic except serial flash and 40 MHz XTAL   .

But this board can`t make clock signal at RTC_XTAL.

Please let me know what problem it has.

Hi,

I am not sure I understand what you are trying to do in last picture.

Regarding the waveform you shared, if voltage is toggling it means that the device can not ramp up. This explain why you dont have RTC clock.

Did you have your schematic reviewed using our hardware design review process: http://processors.wiki.ti.com/index.php/CC31xx_%26_CC32xx_Hardware_Design_Review?

Ben