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USB Superspeed Peripherals

chsh_1759911
New Contributor II

I had download AN75779.zip(http://www.cypress.com/file/123501/download) 03/24/2016 

   

use fpga to creat data

   

the example is 8bit with 30fps works fine then i change to 16bit with 60fps still works fine

   

but when i change to 32bit (60fps and 120fps) the problem occur the data didn't transfer thought usb

   

follow the pdf i sure isDQ32bit is true both counters is 4091 and SPI is false

   

this is the list what i changed:

   

X,Y dimension ratio to 5:4

   

height to 1024

   

fps to 120

   

frame size to 2621440 (1280*1024*2)

   

which those in VS format descriptor / VS frame descriptor / UVC Probe control settings

   

In GPIF setting

   

change data bus width to 32bit

   

delete sensor_reset pin

   

change LD_data_counter/LD_addr_counter to 4091

   

 

   

So why this problem happen and whats special for 32bit mode? 

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