The Gowin IODELAY primitive is a programmable delay unit that can be used for input or output logic in FPGA designs. It provides a total of 128 (0~127) delays, with single-step delay times of approximately 30ps for the GW1N series and 18ps for the GW2A series. The IODELAY module has multiple setting modes, including static mode, dynamic mode, and adaptive mode, allowing users to adjust the delay value as needed.

This device is not yet supported in Apicula

IODELAY #(
    .ADAPT_EN(ADAPT_EN),
    .C_STATIC_DLY(C_STATIC_DLY),
    .DYN_DLY_EN(DYN_DLY_EN)
) iodelay_inst (
    .DF(DF),
    .DI(DI),
    .DLYSTEP(DLYSTEP),
    .DO(DO),
    .SDTAP(SDTAP),
    .VALUE(VALUE)
);

This device is not yet supported in Apicula

IODELAYA #(
    .C_STATIC_DLY(C_STATIC_DLY)
) iodelaya_inst (
    .DF(DF),
    .DI(DI),
    .DO(DO),
    .SDTAP(SDTAP),
    .SETN(SETN),
    .VALUE(VALUE)
);

The IODELAYB module provides a total of 128 (0 to 127) delay, adding more delay adjustments compared to IODELAY. It can be used for I/O logic input, but not for I/O logic output.

This device is not yet supported in Apicula

IODELAYB #(
    .C_STATIC_DLY(C_STATIC_DLY),
    .DA_SEL(DA_SEL),
    .DELAY_MUX(DELAY_MUX)
) iodelayb_inst (
    .DAADJ(DAADJ),
    .DAO(DAO),
    .DF(DF),
    .DI(DI),
    .DO(DO),
    .SDTAP(SDTAP),
    .SETN(SETN),
    .VALUE(VALUE)
);

The IODELAYC module provides a total of 128 (0 to 127) delays, adding more delay adjustments compared to IODELAY. It can be used for I/O logic input, but not for I/O logic output.

This device is not yet supported in Apicula

IODELAYC #(
    .C_STATIC_DLY(C_STATIC_DLY),
    .DA_SEL(DA_SEL),
    .DYN_DA_SEL(DYN_DA_SEL)
) iodelayc_inst (
    .DAADJ(DAADJ),
    .DAO(DAO),
    .DASEL(DASEL),
    .DF(DF),
    .DI(DI),
    .DO(DO),
    .SDTAP(SDTAP),
    .SETN(SETN),
    .VALUE(VALUE)
);