Hi, what could be the reason I get this error? Error (169001): Pin A2 does not support I/O standard Differential 1.8-V HSTL Class I for mACp Quartus prime 18.1 windows FPGA is 10CL025YU256I7G Pin is output only, never tristated VCCIO is 1.8V

[HSpen]

I tried other pins/banks but none of the pins accepts differential HSTL, any ideas?

Thanks

[YuanLi_S_Intel]

Hi Harry,

HSTL is only supported on clock input pin

https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/cyclone-10/c10lp-51003.pdf (Page 101)