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Using GPIO pins reserved for Slave FIFO
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RSKV

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Using GPIO pins reserved for Slave FIFO

Superspeedy posted on 11 Oct 2012 6:57 AM PST
Member
8 Forum Posts

I would like to use a 32 bit wide synchronous slave FIFO interface with my FX3 circuit. This reserves a large number of pins.

Before the slave FIFO interface is put into operation, I would like to borrow two or three of these pins (marked GPIO) in order to have enough pins to configure my FPGA. Can I temporarily configure these pins as Simple IO, on the fly even after the GPIO-2 configuration data has been loaded? Or does the GPIO-2 configuration data override?

Re: Using GPIO pins reserved for Slave FIFO

RSKV posted on 14 Oct 2012 06:52 AM PST
Cypress Employee
655 Forum Posts

Yes. You can do that.

Initially for configuring the FPGA, you can use few GPIOs from the slave FIFO interface and once after the configuration is done you can re-load the GPIF descriptors to use the GPIF as slave FIFO interface. 

Thanks,

sai krishna.

 

Re: Using GPIO pins reserved for Slave FIFO

Superspeedy posted on 14 Oct 2012 10:29 AM PST
Member
8 Forum Posts

OK, thanks.



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