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Altera_Forum's avatar
Altera_Forum
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10 years ago

1.8V LVDS inputs

Hello, I am using a Cyclone IV EP4CE15 FPGA and I need to accept 1.8V LVDS inputs from an image sensor. (100R termination, 150mV voltage swing, 0.9V common mode voltage). I am unsure how to d...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

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The VCCIO voltage for a bank with LVDS inputs on the Cyclone IV MUST be 2.5V (look in the device handbook). The LVDS inputs will be compatible with your image sensor. No VREF voltage is required. The I/O type must be specified as LVDS in the Quartus Pin Planner. There is no OCT for LVDS inputs, you must supply an external termination resistor.

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Thank-you for your reply. However the sensor LVDS outputs are 1.8V, not 2.5V, so I don't believe I can use the LVDS mode.