Altera Designing With Low-Level Primitives - Manual (Page 18)

1–12 Altera Corporation
Designing with Low-Level Primitives User Guide April 2007
Low-Level Primitive Examples
Example 1–7 shows a Verilog example for a 64, 8-bit word single-port
memory function.
Example 1–7. A 64, 8-Bit Word Single-Port Memory Function, Verilog
altsyncram altsyncram_component (
.wren_a (wren),
.clock0 (clock),
.address_a (wraddress),
.address_b (rdaddress),
.data_a (data_in),
.q_b (data_out),
.aclr0 (1'b0),
.aclr1 (1'b0),
.clocken1 (1'b1),
.clocken0 (1'b1),
.q_a (),
.data_b ({8{1'b1}}),
.rden_b (1'b1),
.wren_b (1'b0),
.byteena_b (1'b1),
.addressstall_a (1'b0),
.byteena_a (1'b1),
.addressstall_b (1'b0),
.clock1 (1'b1));
defparam
altsyncram_component.address_aclr_a = "NONE",
altsyncram_component.address_aclr_b = "NONE",
altsyncram_component.address_reg_b = "CLOCK0",
altsyncram_component.indata_aclr_a = "NONE",
altsyncram_component.intended_device_family = "Stratix",
altsyncram_component.lpm_type = "altsyncram",
//This is where a 64, 8-bit word is modified.
altsyncram_component.numwords_a = 64,
altsyncram_component.numwords_b = 64,
altsyncram_component.operation_mode = "DUAL_PORT",
altsyncram_component.outdata_aclr_b = "NONE",
altsyncram_component.outdata_reg_b = "CLOCK0",
altsyncram_component.power_up_uninitialized = "FALSE",
altsyncram_component.read_during_write_mode_mixed_ports
="DONT_CARE",
altsyncram_component.widthad_a = 6,
altsyncram_component.widthad_b = 6,
//This is the width of the input port.
altsyncram_component.width_a = 8,
altsyncram_component.width_b = 8,
altsyncram_component.width_byteena_a = 1,
altsyncram_component.wrcontrol_aclr_a = "NONE";