Files
PLFM_RADAR/9_Firmware/9_2_FPGA
Jason d50e51ada6 fix(rtl,constraints): change IBUFDS to IOSTANDARD DEFAULT for multi-target bank voltage compatibility
The IBUFDS primitives in ad9484_interface_400m.v hardcoded LVDS_25 and
DIFF_TERM TRUE, which overrode XDC constraints. On the XC7A50T (Bank 14
VCCO=3.3V), this caused a BIVC-1 DRC error: LVDS_25 requires VCCO=2.5V,
conflicting with adc_pwdn (LVCMOS33, VCCO=3.3V) in the same bank.

Changes:
- ad9484_interface_400m.v: IBUFDS parameters changed from LVDS_25/DIFF_TERM
  TRUE to DEFAULT/DIFF_TERM FALSE, delegating control to XDC per target
- xc7a50t_ftg256.xdc: Re-enable DIFF_TERM TRUE (safe now that RTL does not
  hardcode LVDS_25), update DRC Fix History with correct root cause
2026-04-07 05:17:11 +03:00
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