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Altera_Forum
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16 years ago

FPGA cyclone4 and EPCS16

I am mew to this field. I am using cyclone 4 FPGA.I want to configure automatically when power up.So i found AS mode with EPCS16 and JTAG.As give on handbook ,i need maximum around 9 MB RAM.So i ...
Altera_Forum's avatar
Altera_Forum
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16 years ago

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Hi Kevin,

I know there are 3rd party 8Mb devices, but never tried one.

I never did, because Altera checks device ID before programming and I supposed that the 8 Mb ID (0x13) wouldn't be supported.

But it is, if I read your post. Could you confirm this? Or did you use a different way to program your device?

Thanks, Ton

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The 8 Mbit part I have used successfully is the Numonyx M25P80. When I first starting using it, I was able to simply create a JIC file with the device set to EPCS4 to program it without any trouble. However, after upgrading to a newer version of Quaruts (I don't remember which exact version at the moment), this method would fail complaining about the wrong ID (even when you check the ignore ID option). I then found I could convert the JIC file to a JAM file and was able to remove the ID check from the JAM file.

During the initial debugging of all this, I also successfully used an aardvark (http://www.totalphase.com/products/aardvark_i2cspi/) (USB to I2C/SPI adapater) to program the flash.

I also tried an Atmel 8 Mbit part, but the Cyclone III refused to configure from it.