ez-usb opreation cycle query

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cross mob
Anonymous
Not applicable

CPUCS=0x12;

   

CLKOUT 48Mhz

   

how much time does firmware need when bit IOE^4 Low to High (not rising time i mean the cycles)

   

IOE^4=1;

   

IOE^4=0;

   

I measure the High Level's "time“ is "3Mhz" with oscilloscope (convert to Hz).

   

My query is why not  "time“  is 48/4 (4 cycle an order)=12Mhz?

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Anonymous
Not applicable

 Hi,

   

 

   

I don't get your query

   

 

   

"I measure the High Level's "time“ is "3Mhz" with oscilloscope (convert to Hz).

   

My query is why not  "time“  is 48/4 (4 cycle an order)=12Mhz?"

   

 

   

Are you trying to find out how many does it take to execute to drive the IOE pin from low to high?

   

 

   

Where did you got the info that it takes 4 cycles to do it?

   

 

   

Regards,

   

VIkas

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