Xilinx Virtex-6 Manual page 323

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;
-- RAM64X1S_1: 64 x 1 negative edge write, asynchronous read single-port distributed RAM
-- Virtex-6
-- Xilinx HDL Libraries Guide, version 14.5
RAM64X1S_1_inst : RAM64X1S_1
generic map (
INIT => X"0000000000000000")
port map (
O => O, -- 1-bit data output
A0 => A0, -- Address[0] input bit
A1 => A1, -- Address[1] input bit
A2 => A2, -- Address[2] input bit
A3 => A3, -- Address[3] input bit
A4 => A4, -- Address[4] input bit
A5 => A5, -- Address[5] input bit
D => D, -- 1-bit data input
WCLK => WCLK, -- Write clock input
WE => WE -- Write enable input
);
-- End of RAM64X1S_1_inst instantiation
Verilog Instantiation Template
// RAM64X1S_1: 64 x 1 negative edge write, asynchronous read single-port distributed RAM
// Virtex-6
// Xilinx HDL Libraries Guide, version 14.5
RAM64X1S_1 #(
.INIT(64'h0000000000000000) // Initial contents of RAM
) RAM64X1S_1_inst (
.O(O), // 1-bit data output
.A0(A0), // Address[0] input bit
.A1(A1), // Address[1] input bit
.A2(A2), // Address[2] input bit
.A3(A3), // Address[3] input bit
.A4(A4), // Address[4] input bit
.A5(A5), // Address[5] input bit
.D(D), // 1-bit data input
.WCLK(WCLK), // Write clock input
.WE(WE) // Write enable input
);
// End of RAM64X1S_1_inst instantiation
For More Information
See the Virtex-6 FPGA User Documentation (User Guides and Data
Virtex-6 Libraries Guide for HDL Designs
UG623 (v 14.5) March 20, 2013
Sheets).
www.xilinx.com
Chapter 4: About Design Elements
323