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Re: array of max6953 for LED 5X7 display

 
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evaradharaj



Joined: 15 Jan 2009
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Re: array of max6953 for LED 5X7 display
PostPosted: Thu Jul 15, 2010 7:11 am     Reply with quote
Hi,

I am doing LED running display with 20 5X7 LED arrays. I have used that max6953 driver code. There we can have the device address change for max6953. In the hardware also we have AD0 and AD1 for changing the address.

I have done with 4 5X7 LED matrix arrays. It is working fine.

My doubt is how to give the message for all the max6953 at a time?

And how to scroll the image?

Thanks in advance.

Regards,
Varadharaj E
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evaradharaj



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Re:reply
PostPosted: Fri Jul 16, 2010 1:15 am     Reply with quote
Hi all

Please try for answer this .. I am in urgent need.
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ckielstra



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PostPosted: Fri Jul 16, 2010 5:45 am     Reply with quote
Quote:
I have used that max6953 driver code.
Can you give more details of this driver? Is it from CCS? Or if you have found it on the web post a link to it.

The MAX6953 can drive up to 4 arrays of 5x7 LEDs. For 20 arrays you need 5 x MAX6953.

In the I2C communication bus every connected chip has a unique address. Because you are using several of the same chips you have to connect the chips in such a way that they all get a different address. See Table-3 in the datasheet. There are 16 possible addresses. Just choose 5 for your chips and then in your driver make sure to use these addresses.
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