Primitive: Gigabit Transceiver Buffer
Introduction
IBUFDS_GTE2 is the gigabit transceiver input pad buffer component in 7 series devices. The REFCLK signal should be routed to the dedicated reference clock input pins on the serial transceiver, and you should instantiate the IBUFDS_GTE2 primitive in your design. See the 7 Series FPGAs GTX/GTH Transceivers User Guide (UG476) for more information on PCB layout requirements, including reference clock requirements.
Design Entry Method
| Instantiation | Yes |
| Inference | No |
| IP Catalog | Recommended |
| Macro support | No |
VHDL Instantiation Template
Unless they already exist, copy the following
two statements and paste them before the entity declaration.
Library UNISIM;
use UNISIM.vcomponents.all;
-- IBUFDS_GTE2: Gigabit Transceiver Buffer
-- 7 Series
-- Xilinx HDL Language Template, version 2022.1
IBUFDS_GTE2_inst : IBUFDS_GTE2
generic map (
CLKCM_CFG => TRUE, -- Refer to Transceiver User Guide
CLKRCV_TRST => TRUE, -- Refer to Transceiver User Guide
CLKSWING_CFG => '11' -- Refer to Transceiver User Guide
)
port map (
O => O, -- 1-bit output: Refer to Transceiver User Guide
ODIV2 => ODIV2, -- 1-bit output: Refer to Transceiver User Guide
CEB => CEB, -- 1-bit input: Refer to Transceiver User Guide
I => I, -- 1-bit input: Refer to Transceiver User Guide
IB => IB -- 1-bit input: Refer to Transceiver User Guide
);
-- End of IBUFDS_GTE2_inst instantiation
Verilog Instantiation Template
// IBUFDS_GTE2: Gigabit Transceiver Buffer
// 7 Series
// Xilinx HDL Language Template, version 2022.1
IBUFDS_GTE2 #(
.CLKCM_CFG("TRUE"), // Refer to Transceiver User Guide
.CLKRCV_TRST("TRUE"), // Refer to Transceiver User Guide
.CLKSWING_CFG(2'b11) // Refer to Transceiver User Guide
)
IBUFDS_GTE2_inst (
.O(O), // 1-bit output: Refer to Transceiver User Guide
.ODIV2(ODIV2), // 1-bit output: Refer to Transceiver User Guide
.CEB(CEB), // 1-bit input: Refer to Transceiver User Guide
.I(I), // 1-bit input: Refer to Transceiver User Guide
.IB(IB) // 1-bit input: Refer to Transceiver User Guide
);
// End of IBUFDS_GTE2_inst instantiation