AHDL Function Prototype (port name and order also apply to Verilog HDL)
The AHDL function prototype is located in the AHDL Include File (.inc) Definitionaltotp.inc in the <Intel® Quartus® Prime installation directory>\libraries\megafunctions directory.
FUNCTION altotp ( otp_clk, otp_clken, otp_shiftnld ) WITH ( init_data ) RETURNS ( otp_dout );