Digitally Controlled Impedance with Lattice ECP2M FPGA's

Dec 02, 2006 2 Replies
J

Does anyone know if the LATTICE ECP2M FPGA's have on die Digitally Controlled Impedance (DCI) matching for input LVDS? I am designing a x4 lane PCIe digitiser card with the National 500MSPS ADC and the ECP2M FPGA. The ADC output 32 pair LVDS and I have read the FPGA datasheet but there is no mention of DCI??



Thanks slkjas



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G

I'm pretty sure that the general purpose I/O pins do not have DCI, but the SERDES receivers have selectable

50 Ohm or 2K ohm differential termination. Look for ZRX-TERM in the data sheet.
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