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Altera_Forum's avatar
Altera_Forum
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15 years ago

1.8 V Lvcmos

Hi @ all, I want to use LPDDR RAM which makes 1,8 V LVCMOS outputs necessary. In the Pin Assignment Window, I can only choose 1.8 V (without the additional specification LVCMOS). Is this opt...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

You can check the exact characteristics for a given I/O standard in the data sheet for the FPGA in question.

I just looked at a Cyclone IV data sheet, and it actually groups together 1.8V LVTTL and LVCMOS into one item with the same specs. The same is true for 2.5V. For 3.3V or 3.0V, there are different specs listed for LVTTL and LVCMOS.