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Anonymous
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USER CLK can not be selected through PCA954A switch in VC707

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I want to use, USER CLK in my application, when i try to establish an I2C link with USER CLK through I2C 8:1 switch PCA954A by initially sending PCA954A address 0x74 and then configuration byte as 0x01 and stop condition. When i try to access the USER CLK at address 0x70, i'm not getting acknowledgement from the slave. Can someone help me to fix my problem.  I have attached the vhd code of my I2C controller

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Anonymous
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Re: USER CLK can not be selected through PCA954A switch in VC707

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Hi,

I have fixed this bug, the problem was i was referring slave address in september 2014 manual, which is not working, when i looked at april 2015 manual it is working without any problem.

 

In the september 2014 version of VC707 userguide, under I2C Bus sub section, slave address for USER_CLK_SDL/SCL  is 0b1110000,  in the april 2015 version of the userguide, slave address for USER_CLK_SDL/SCL(Si570 Clock) is 0b1011101.

 

Address given is the 2014 version of userguide is not working, while april 2015 gives the correct slave address.

 

Thank you

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Moderator
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Registered: ‎02-16-2010

Re: USER CLK can not be selected through PCA954A switch in VC707

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You can use the reference designs available for VC707 to program the USER_CLK. Are you looking to do a different operation than this?

Check the reference designs at the link below.
http://xgoogle.xilinx.com/search?output=xml_no_dtd&ie=UTF-8&oe=UTF-8&client=support&proxystylesheet=support&site=Answers_Docs&filter=0&resultsView=category&tab=bk&num=1000&sortBy=date&show_dynamic_navigation=1&sort=date%3AD%3AR%3Ad1&documentClass=Doc...
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Anonymous
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16,746 Views

Re: USER CLK can not be selected through PCA954A switch in VC707

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Hi,

I have fixed this bug, the problem was i was referring slave address in september 2014 manual, which is not working, when i looked at april 2015 manual it is working without any problem.

 

In the september 2014 version of VC707 userguide, under I2C Bus sub section, slave address for USER_CLK_SDL/SCL  is 0b1110000,  in the april 2015 version of the userguide, slave address for USER_CLK_SDL/SCL(Si570 Clock) is 0b1011101.

 

Address given is the 2014 version of userguide is not working, while april 2015 gives the correct slave address.

 

Thank you

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