www.pudn.com > NiosII_LED.rar > a_dpfifo_8t21.tdf, change:2010-10-27,size:3326b

--a_dpfifo ALLOW_RWCYCLE_WHEN_FULL="OFF" DEVICE_FAMILY="Cyclone II" LPM_NUMWORDS=64 LPM_SHOWAHEAD="OFF" lpm_width=8 lpm_widthu=6 OVERFLOW_CHECKING="OFF" UNDERFLOW_CHECKING="OFF" aclr clock data empty full q rreq sclr usedw wreq CARRY_CHAIN="MANUAL" CARRY_CHAIN_LENGTH=48 CYCLONEII_M4K_COMPATIBILITY="ON" LOW_POWER_MODE="AUTO" lpm_hint="RAM_BLOCK_TYPE=AUTO" RAM_BLOCK_TYPE="AUTO" 
--VERSION_BEGIN 9.0 cbx_altdpram 2008:05:19:10:27:12:SJ cbx_altsyncram 2008:11:06:10:05:41:SJ cbx_cycloneii 2008:05:19:10:57:37:SJ cbx_fifo_common 2008:05:19:10:54:06:SJ cbx_lpm_add_sub 2008:12:09:22:11:50:SJ cbx_lpm_compare 2009:02:03:01:43:16:SJ cbx_lpm_counter 2008:05:19:10:42:20:SJ cbx_lpm_decode 2008:05:19:10:39:27:SJ cbx_lpm_mux 2008:05:19:10:30:36:SJ cbx_mgl 2009:01:29:16:12:07:SJ cbx_scfifo 2008:05:19:10:25:30:SJ cbx_stratix 2008:09:18:16:08:35:SJ cbx_stratixii 2008:11:14:16:08:42:SJ cbx_stratixiii 2008:12:24:11:49:14:SJ cbx_util_mgl 2008:11:21:14:58:47:SJ  VERSION_END 
 
 
-- Copyright (C) 1991-2009 Altera Corporation 
--  Your use of Altera Corporation's design tools, logic functions  
--  and other software and tools, and its AMPP partner logic  
--  functions, and any output files from any of the foregoing  
--  (including device programming or simulation files), and any  
--  associated documentation or information are expressly subject  
--  to the terms and conditions of the Altera Program License  
--  Subscription Agreement, Altera MegaCore Function License  
--  Agreement, or other applicable license agreement, including,  
--  without limitation, that your use is for the sole purpose of  
--  programming logic devices manufactured by Altera and sold by  
--  Altera or its authorized distributors.  Please refer to the  
--  applicable agreement for further details. 
 
 
FUNCTION a_fefifo_7cf (aclr, clock, rreq, sclr, wreq) 
RETURNS ( empty, full, usedw_out[5..0]); 
FUNCTION dpram_5h21 (data[7..0], inclock, outclock, outclocken, rdaddress[5..0], wraddress[5..0], wren) 
RETURNS ( q[7..0]); 
FUNCTION cntr_fjb (aclr, clock, cnt_en, sclr) 
RETURNS ( q[5..0]); 
 
--synthesis_resources = lut 18 M4K 1 reg 20  
SUBDESIGN a_dpfifo_8t21 
(  
	aclr	:	input; 
	clock	:	input; 
	data[7..0]	:	input; 
	empty	:	output; 
	full	:	output; 
	q[7..0]	:	output; 
	rreq	:	input; 
	sclr	:	input; 
	usedw[5..0]	:	output; 
	wreq	:	input; 
)  
VARIABLE  
	fifo_state : a_fefifo_7cf; 
	FIFOram : dpram_5h21; 
	rd_ptr_count : cntr_fjb; 
	wr_ptr : cntr_fjb; 
	rd_ptr[5..0]	: WIRE; 
	valid_rreq	: WIRE; 
	valid_wreq	: WIRE; 
 
BEGIN  
	fifo_state.aclr = aclr; 
	fifo_state.clock = clock; 
	fifo_state.rreq = rreq; 
	fifo_state.sclr = sclr; 
	fifo_state.wreq = wreq; 
	FIFOram.data[] = data[]; 
	FIFOram.inclock = clock; 
	FIFOram.outclock = clock; 
	FIFOram.outclocken = (valid_rreq # sclr); 
	FIFOram.rdaddress[] = ((! sclr) & rd_ptr[]); 
	FIFOram.wraddress[] = wr_ptr.q[]; 
	FIFOram.wren = valid_wreq; 
	rd_ptr_count.aclr = aclr; 
	rd_ptr_count.clock = clock; 
	rd_ptr_count.cnt_en = valid_rreq; 
	rd_ptr_count.sclr = sclr; 
	wr_ptr.aclr = aclr; 
	wr_ptr.clock = clock; 
	wr_ptr.cnt_en = valid_wreq; 
	wr_ptr.sclr = sclr; 
	empty = fifo_state.empty; 
	full = fifo_state.full; 
	q[] = FIFOram.q[]; 
	rd_ptr[] = rd_ptr_count.q[]; 
	usedw[] = fifo_state.usedw_out[]; 
	valid_rreq = rreq; 
	valid_wreq = wreq; 
END; 
--VALID FILE