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Using I2S to config FPGA | Cypress Semiconductor

Using I2S to config FPGA

Summary: 2 Replies, Latest post by DavidAustin on 03 Feb 2014 09:23 PM PST
Verified Answers: 2
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jincog's picture
6 posts

In GPIF 32-bit mode, SPI is not available. Although there is an app note (AN84868) on this topic, but it involves reconfiguring the GPIF to 32-bit after FPGA configuration. To avoid this 2-step process, I'm thinking if it's possible to use the CLK and Data pins of I2S in native mode (not bit banging) to config FPGA in slave serial mode.

rskv's picture
Cypress Employee
1134 posts


Right. It looks like you can use I2S (CLK and Data) to do this along with the couple of GPIOs.


Sai Krishna.

DavidAustin's picture
12 posts

As long as you don't need to read from the FPGA - I2S is transmit only...


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