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Altera_Forum
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16 years ago

Maximum Frequency Input on Cyclone 3 device

Hi, I have to realise a frequency divisor from 320 MHz to 40 Mhz. I read from datasheet of cyclone 3 that maximum frequency input on clock pin (LVDS in single ended mode) is about 400MHz. Could yo...
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Altera_Forum
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16 years ago

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They classify Max input clock frequency according to "Modes" *1, *2, *4, *7.....

What is a Mode ? Is it a kind of protocol for LVDS transmittion ?

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modes is referring to serialization factor. Cyclone III SERDES uses software SERDES only, so you are not limited to the Modes provided by the altlvds MegaFunction.

LVDS implies no particular protocol, it's a synchronous raw binary data transmission.