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1 3 mgeng 
----------------------------------------------------------------------
2 
----                                                              ----
3 
---- Test pattern generator for the                               ----
4 
---- Synchronous static RAM ("Zero Bus Turnaround" RAM, ZBT RAM)  ----
5 
---- simulation model.                                            ----
6 
----                                                              ----
7 
---- This file is part of the simu_mem project.                   ----
8 
----                                                              ----
9 
---- Description                                                  ----
10 
---- This architecture generates test patterns according to       ----
11 
---- K7N643645M, 72Mb NtRAM Specification, Samsung, Rev. 1.3      ----
12 
---- September 2008                                               ----
13 
----                                                              ----
14 
---- Authors:                                                     ----
15 
---- - Michael Geng, vhdl@MichaelGeng.de                          ----
16 
----                                                              ----
17 
----------------------------------------------------------------------
18 
----                                                              ----
19 
---- Copyright (C) 2008 Authors                                   ----
20 
----                                                              ----
21 
---- This source file may be used and distributed without         ----
22 
---- restriction provided that this copyright statement is not    ----
23 
---- removed from the file and that any derivative work contains  ----
24 
---- the original copyright notice and the associated disclaimer. ----
25 
----                                                              ----
26 
---- This source file is free software; you can redistribute it   ----
27 
---- and/or modify it under the terms of the GNU Lesser General   ----
28 
---- Public License as published by the Free Software Foundation; ----
29 
---- either version 2.1 of the License, or (at your option) any   ----
30 
---- later version.                                               ----
31 
----                                                              ----
32 
---- This source is distributed in the hope that it will be       ----
33 
---- useful, but WITHOUT ANY WARRANTY; without even the implied   ----
34 
---- warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ----
35 
---- PURPOSE. See the GNU Lesser General Public License for more  ----
36 
---- details.                                                     ----
37 
----                                                              ----
38 
---- You should have received a copy of the GNU Lesser General    ----
39 
---- Public License along with this source; if not, download it   ----
40 
---- from http://www.gnu.org/licenses/lgpl.html                   ----
41 
----                                                              ----
42 
----------------------------------------------------------------------
43 
-- CVS Revision History
44 
--
45 
-- $Log: not supported by cvs2svn $
46 
--
47 
ARCHITECTURE deterministic OF patgen IS
48 
  -- Patterns according to K7N643645M, 72Mb NtRAM Specification, Samsung, Rev. 1.3 September 2008
49 
 
50 
  CONSTANT D_width : INTEGER := D'LENGTH;
51 
  CONSTANT A_width : INTEGER := A'LENGTH;
52 
BEGIN
53 
  pPatternGenerator : PROCESS IS
54 
    VARIABLE random    : NATURAL;
55 
    VARIABLE FirstTime : BOOLEAN := TRUE;
56 
    VARIABLE WE_n_v    : STD_LOGIC;
57 
  BEGIN
58 
    -- initialisations
59 
    random := 1;
60 
    D      <= (D_width - 1 DOWNTO 0 => '0');
61 
    A      <= (A_width - 1 DOWNTO 0 => '0');
62 
    ADV    <= '0';
63 
    WE_n   <= '0';
64 
    CKE_n  <= '0';
65 
    CS1_n  <= '0';
66 
    CS2    <= '0';
67 
    CS2_n  <= '0';
68 
    CKE_n  <= '0';
69 
    OE_n   <= '0';
70 
    ZZ     <= '0';
71 
    LBO_n  <= '0';
72 
    BW_n   <= (D_width / 9 - 1 DOWNTO 0 => '0');
73 
 
74 
    IF FirstTime THEN
75 
      WAIT UNTIL (Rst = '0');
76 
      FirstTime := FALSE;
77 
    END IF;
78 
 
79 
    ---------------------------------------------------------------------------------------------
80 
    -- Pattern according to "Timing waveform of write cycle", page 20
81 
    ---------------------------------------------------------------------------------------------
82 
    WAIT UNTIL FALLING_EDGE (Clk);
83 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A10#, A_width));
84 
    CS2    <= '1';
85 
    D      <= (D_width - 1 DOWNTO 0 => 'Z');
86 
 
87 
    WAIT UNTIL FALLING_EDGE (Clk);
88 
    random_vector (A, random);
89 
    CS1_n  <= '1';
90 
    random := lcg (random);
91 
    CS2    <= TO_UNSIGNED (random, 32)(0);
92 
    CS2_n  <= TO_UNSIGNED (random, 32)(1);
93 
    WE_n   <= TO_UNSIGNED (random, 32)(2);
94 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 2 DOWNTO 3));
95 
 
96 
    OE_n   <= '1' AFTER clk_periode * 1.5 - tOE;
97 
    WAIT UNTIL FALLING_EDGE (Clk);
98 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A20#, A_width));
99 
    WE_n   <= '0';
100 
    BW_n   <= (D_width / 9 - 1 DOWNTO 0 => '0');
101 
    CS1_n  <= '0';
102 
    CS2    <= '1';
103 
    CS2_n  <= '0';
104 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D11#, D_width));
105 
 
106 
    random := lcg (random);
107 
    OE_n   <= TO_UNSIGNED (random, 32)(0) AFTER clk_periode * 1.5 - tOE;
108 
    WAIT UNTIL FALLING_EDGE (Clk);
109 
    random_vector (A, random);
110 
    random := lcg (random);
111 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
112 
    CS2    <= TO_UNSIGNED (random, 32)(1);
113 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
114 
    ADV    <= '1';
115 
    random_vector (D, random);
116 
 
117 
    random := lcg (random);
118 
    OE_n   <= TO_UNSIGNED (random, 32)(0) AFTER clk_periode * 1.5 - tOE;
119 
    WAIT UNTIL FALLING_EDGE (Clk);
120 
    random_vector (A, random);
121 
    random := lcg (random);
122 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
123 
    CS2    <= TO_UNSIGNED (random, 32)(1);
124 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
125 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D21#, D_width));
126 
 
127 
    random := lcg (random);
128 
    OE_n   <= TO_UNSIGNED (random, 32)(0) AFTER clk_periode * 1.5 - tOE;
129 
    WAIT UNTIL FALLING_EDGE (Clk);
130 
    random_vector (A, random);
131 
    random := lcg (random);
132 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
133 
    CS2    <= TO_UNSIGNED (random, 32)(1);
134 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
135 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D22#, D_width));
136 
 
137 
    random := lcg (random);
138 
    OE_n   <= TO_UNSIGNED (random, 32)(0) AFTER clk_periode * 1.5 - tOE;
139 
    WAIT UNTIL FALLING_EDGE (Clk);
140 
    CKE_n  <= '1';
141 
    random_vector (A, random);
142 
    random := lcg (random);
143 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
144 
    CS2    <= TO_UNSIGNED (random, 32)(1);
145 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
146 
    ADV    <= TO_UNSIGNED (random, 32)(3);
147 
    WE_n   <= TO_UNSIGNED (random, 32)(4);
148 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 4 DOWNTO 5));
149 
    random_vector (D, random);
150 
 
151 
    random := lcg (random);
152 
    OE_n   <= TO_UNSIGNED (random, 32)(0) AFTER clk_periode * 1.5 - tOE;
153 
    WAIT UNTIL FALLING_EDGE (Clk);
154 
    CKE_n  <= '0';
155 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A30#, A_width));
156 
    WE_n   <= '0';
157 
    BW_n   <= (D_width / 9 - 1 DOWNTO 0 => '0');
158 
    CS1_n  <= '0';
159 
    CS2    <= '1';
160 
    CS2_n  <= '0';
161 
    ADV    <= '0';
162 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D23#, D_width));
163 
 
164 
    random := lcg (random);
165 
    OE_n   <= TO_UNSIGNED (random, 32)(0) AFTER clk_periode * 1.5 - tOE;
166 
    WAIT UNTIL FALLING_EDGE (Clk);
167 
    random_vector (A, random);
168 
    random := lcg (random);
169 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
170 
    CS2    <= TO_UNSIGNED (random, 32)(1);
171 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
172 
    ADV    <= '1';
173 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D24#, D_width));
174 
 
175 
    random := lcg (random);
176 
    OE_n   <= TO_UNSIGNED (random, 32)(0) AFTER clk_periode * 1.5 - tOE;
177 
    WAIT UNTIL FALLING_EDGE (Clk);
178 
    random_vector (A, random);
179 
    random := lcg (random);
180 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
181 
    CS2    <= TO_UNSIGNED (random, 32)(1);
182 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
183 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D31#, D_width));
184 
 
185 
    random := lcg (random);
186 
    OE_n   <= TO_UNSIGNED (random, 32)(0) AFTER clk_periode * 1.5 - tOE;
187 
    WAIT UNTIL FALLING_EDGE (Clk);
188 
    random_vector (A, random);
189 
    random := lcg (random);
190 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
191 
    CS2    <= TO_UNSIGNED (random, 32)(1);
192 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
193 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D32#, D_width));
194 
 
195 
    random := lcg (random);
196 
    OE_n   <= TO_UNSIGNED (random, 32)(0) AFTER clk_periode * 1.5 - tOE;
197 
    WAIT UNTIL FALLING_EDGE (Clk);
198 
    random_vector (A, random);
199 
    random := lcg (random);
200 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
201 
    CS2    <= TO_UNSIGNED (random, 32)(1);
202 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
203 
    ADV    <= TO_UNSIGNED (random, 32)(3);
204 
    WE_n   <= TO_UNSIGNED (random, 32)(4);
205 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 4 DOWNTO 5));
206 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D33#, D_width));
207 
 
208 
    random := lcg (random);
209 
    OE_n   <= TO_UNSIGNED (random, 32)(0) AFTER clk_periode * 1.5 - tOE;
210 
    WAIT UNTIL FALLING_EDGE (Clk);
211 
    random_vector (A, random);
212 
    random := lcg (random);
213 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
214 
    CS2    <= TO_UNSIGNED (random, 32)(1);
215 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
216 
    ADV    <= TO_UNSIGNED (random, 32)(3);
217 
    WE_n   <= TO_UNSIGNED (random, 32)(4);
218 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 4 DOWNTO 5));
219 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D34#, D_width));
220 
 
221 
    ---------------------------------------------------------------------------------------------
222 
    -- Pattern according to "Timing waveform of read cycle", page 19
223 
    ---------------------------------------------------------------------------------------------
224 
    OE_n   <= '1' AFTER clk_periode * 1.5 - tOE;
225 
    WAIT UNTIL FALLING_EDGE (Clk);
226 
    CKE_n  <= '0';
227 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A10#, A_width));
228 
    WE_n   <= '1';
229 
    random := lcg (random);
230 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 - 1 DOWNTO 0));
231 
    CS1_n  <= '0';
232 
    CS2    <= '1';
233 
    CS2_n  <= '0';
234 
    ADV    <= '0';
235 
    random_vector (D, random);
236 
 
237 
    WAIT UNTIL FALLING_EDGE (Clk);
238 
    random_vector (A, random);
239 
    CS1_n  <= '1';
240 
    random := lcg (random);
241 
    CS2    <= TO_UNSIGNED (random, 32)(0);
242 
    CS2_n  <= TO_UNSIGNED (random, 32)(1);
243 
    WE_n   <= TO_UNSIGNED (random, 32)(2);
244 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 2 DOWNTO 3));
245 
    D      <= (D_width - 1 DOWNTO 0 => 'Z');
246 
 
247 
    OE_n   <= '0' AFTER clk_periode * 1.5 - tOE;
248 
    WAIT UNTIL FALLING_EDGE (Clk);
249 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A20#, A_width));
250 
    CS1_n  <= '0';
251 
    CS2    <= '1';
252 
    CS2_n  <= '0';
253 
    WE_n   <= '1';
254 
    random := lcg (random);
255 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 - 1 DOWNTO 0));
256 
 
257 
    OE_n   <= '1' AFTER clk_periode * 1.5 - tOE;
258 
    WAIT UNTIL FALLING_EDGE (Clk);
259 
    random_vector (A, random);
260 
    random := lcg (random);
261 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
262 
    CS2    <= TO_UNSIGNED (random, 32)(1);
263 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
264 
    WE_n   <= TO_UNSIGNED (random, 32)(3);
265 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 3 DOWNTO 4));
266 
    ADV    <= '1';
267 
 
268 
    OE_n   <= '0' AFTER clk_periode * 1.5 - tOE;
269 
    WAIT UNTIL FALLING_EDGE (Clk);
270 
    random_vector (A, random);
271 
    random := lcg (random);
272 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
273 
    CS2    <= TO_UNSIGNED (random, 32)(1);
274 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
275 
    WE_n   <= TO_UNSIGNED (random, 32)(3);
276 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 3 DOWNTO 4));
277 
 
278 
    WAIT UNTIL FALLING_EDGE (Clk);
279 
    random_vector (A, random);
280 
    random := lcg (random);
281 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
282 
    CS2    <= TO_UNSIGNED (random, 32)(1);
283 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
284 
    WE_n   <= TO_UNSIGNED (random, 32)(3);
285 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 3 DOWNTO 4));
286 
 
287 
    WAIT UNTIL FALLING_EDGE (Clk);
288 
    CKE_n  <= '1';
289 
    random_vector (A, random);
290 
    random := lcg (random);
291 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
292 
    CS2    <= TO_UNSIGNED (random, 32)(1);
293 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
294 
    ADV    <= TO_UNSIGNED (random, 32)(3);
295 
    WE_n   <= TO_UNSIGNED (random, 32)(4);
296 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 4 DOWNTO 5));
297 
 
298 
    WAIT UNTIL FALLING_EDGE (Clk);
299 
    CKE_n  <= '0';
300 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A30#, A_width));
301 
    CS1_n  <= '0';
302 
    CS2    <= '1';
303 
    CS2_n  <= '0';
304 
    ADV    <= '0';
305 
    random := lcg (random);
306 
    WE_n   <= '1';
307 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 - 1 DOWNTO 0));
308 
 
309 
    WAIT UNTIL FALLING_EDGE (Clk);
310 
    random_vector (A, random);
311 
    random := lcg (random);
312 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
313 
    CS2    <= TO_UNSIGNED (random, 32)(1);
314 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
315 
    WE_n   <= TO_UNSIGNED (random, 32)(3);
316 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 3 DOWNTO 4));
317 
    ADV    <= '1';
318 
 
319 
    WAIT UNTIL FALLING_EDGE (Clk);
320 
    random_vector (A, random);
321 
    random := lcg (random);
322 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
323 
    CS2    <= TO_UNSIGNED (random, 32)(1);
324 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
325 
    WE_n   <= TO_UNSIGNED (random, 32)(3);
326 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 3 DOWNTO 4));
327 
 
328 
    WAIT UNTIL FALLING_EDGE (Clk);
329 
    random_vector (A, random);
330 
    random := lcg (random);
331 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
332 
    CS2    <= TO_UNSIGNED (random, 32)(1);
333 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
334 
    WE_n   <= TO_UNSIGNED (random, 32)(3);
335 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 3 DOWNTO 4));
336 
 
337 
    WAIT UNTIL FALLING_EDGE (Clk);
338 
    random_vector (A, random);
339 
    CS1_n  <= '1';
340 
    random := lcg (random);
341 
    CS2    <= TO_UNSIGNED (random, 32)(0);
342 
    CS2_n  <= TO_UNSIGNED (random, 32)(1);
343 
    WE_n   <= TO_UNSIGNED (random, 32)(2);
344 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 2 DOWNTO 3));
345 
    ADV    <= '0';
346 
 
347 
    WAIT UNTIL FALLING_EDGE (Clk);
348 
    random_vector (A, random);
349 
    random := lcg (random);
350 
    CS1_n  <= TO_UNSIGNED (random, 32)(1);
351 
    CS2    <= TO_UNSIGNED (random, 32)(2);
352 
    CS2_n  <= TO_UNSIGNED (random, 32)(3);
353 
    ADV    <= TO_UNSIGNED (random, 32)(4);
354 
    WE_n   <= TO_UNSIGNED (random, 32)(5);
355 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 5 DOWNTO 6));
356 
 
357 
    ---------------------------------------------------------------------------------------------
358 
    -- write values to 0xA40, 0xA50, 0xA60, 0xA70, 0xA80 and 0xA90
359 
    ---------------------------------------------------------------------------------------------
360 
    OE_n   <= '1' AFTER clk_periode * 1.5 - tOE;
361 
    WAIT UNTIL FALLING_EDGE (Clk);
362 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A40#, A_width));
363 
    CS1_n  <= '0';
364 
    CS2    <= '1';
365 
    CS2_n  <= '0';
366 
    WE_n   <= '0';
367 
    BW_n   <= (D_width / 9 - 1 DOWNTO 0 => '0');
368 
    ADV    <= '0';
369 
 
370 
    WAIT UNTIL FALLING_EDGE (Clk);
371 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A50#, A_width));
372 
 
373 
    WAIT UNTIL FALLING_EDGE (Clk);
374 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A60#, A_width));
375 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D4#, D_width));
376 
 
377 
    WAIT UNTIL FALLING_EDGE (Clk);
378 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A70#, A_width));
379 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D5#, D_width));
380 
 
381 
    WAIT UNTIL FALLING_EDGE (Clk);
382 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A80#, A_width));
383 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D6#, D_width));
384 
 
385 
    WAIT UNTIL FALLING_EDGE (Clk);
386 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A90#, A_width));
387 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D7#, D_width));
388 
 
389 
    WAIT UNTIL FALLING_EDGE (Clk);
390 
    random := lcg (random);
391 
    WE_n   <= '1';
392 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 - 1 DOWNTO 0));
393 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D8#, D_width));
394 
 
395 
    WAIT UNTIL FALLING_EDGE (Clk);
396 
    random := lcg (random);
397 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 - 1 DOWNTO 0));
398 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D9#, D_width));
399 
 
400 
    ---------------------------------------------------------------------------------------------
401 
    -- Pattern according to "Timing waveform of single read/write", page 21
402 
    ---------------------------------------------------------------------------------------------
403 
    WAIT UNTIL FALLING_EDGE (Clk);
404 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A10#, A_width));
405 
    CS1_n  <= '0';
406 
    CS2    <= '1';
407 
    CS2_n  <= '0';
408 
    ADV    <= '0';
409 
    random := lcg (random);
410 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 - 1 DOWNTO 0));
411 
 
412 
    WAIT UNTIL FALLING_EDGE (Clk);
413 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A20#, A_width));
414 
    WE_n   <= '0';
415 
    BW_n   <= (D_width / 9 - 1 DOWNTO 0 => '0');
416 
 
417 
    OE_n   <= '0' AFTER clk_periode * 1.5 - tOE;
418 
    WAIT UNTIL FALLING_EDGE (Clk);
419 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A30#, A_width));
420 
    WE_n   <= '1';
421 
    random := lcg (random);
422 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 - 1 DOWNTO 0));
423 
 
424 
    WAIT UNTIL FALLING_EDGE (Clk);
425 
    random_vector (A, random);
426 
    CS1_n  <= '1';
427 
    random := lcg (random);
428 
    CS2    <= TO_UNSIGNED (random, 32)(0);
429 
    CS2_n  <= TO_UNSIGNED (random, 32)(1);
430 
    WE_n   <= TO_UNSIGNED (random, 32)(2);
431 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 2 DOWNTO 3));
432 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D2#, D_width));
433 
 
434 
    WAIT UNTIL FALLING_EDGE (Clk);
435 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A40#, A_width));
436 
    CS1_n  <= '0';
437 
    CS2    <= '1';
438 
    CS2_n  <= '0';
439 
    WE_n   <= '1';
440 
    random := lcg (random);
441 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 2 DOWNTO 3));
442 
    D      <= (D_width - 1 DOWNTO 0 => 'Z');
443 
 
444 
    WAIT UNTIL FALLING_EDGE (Clk);
445 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A50#, A_width));
446 
    WE_n   <= '0';
447 
    BW_n   <= (D_width / 9 - 1 DOWNTO 0 => '0');
448 
 
449 
    WAIT UNTIL FALLING_EDGE (Clk);
450 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A60#, A_width));
451 
    WE_n   <= '1';
452 
    random := lcg (random);
453 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 2 DOWNTO 3));
454 
 
455 
    WAIT UNTIL FALLING_EDGE (Clk);
456 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A70#, A_width));
457 
    random := lcg (random);
458 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 2 DOWNTO 3));
459 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D5#, D_width));
460 
 
461 
    WAIT UNTIL FALLING_EDGE (Clk);
462 
    CKE_n  <= '1';
463 
    random_vector (A, random);
464 
    random := lcg (random);
465 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
466 
    CS2    <= TO_UNSIGNED (random, 32)(1);
467 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
468 
    ADV    <= TO_UNSIGNED (random, 32)(3);
469 
    WE_n   <= TO_UNSIGNED (random, 32)(4);
470 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 4 DOWNTO 5));
471 
    D      <= (D_width - 1 DOWNTO 0 => 'Z');
472 
 
473 
    WAIT UNTIL FALLING_EDGE (Clk);
474 
    CKE_n  <= '0';
475 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A80#, A_width));
476 
    WE_n   <= '0';
477 
    BW_n   <= (D_width / 9 - 1 DOWNTO 0 => '0');
478 
    CS1_n  <= '0';
479 
    CS2    <= '1';
480 
    CS2_n  <= '0';
481 
    ADV    <= '0';
482 
 
483 
    WAIT UNTIL FALLING_EDGE (Clk);
484 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A90#, A_width));
485 
 
486 
    ---------------------------------------------------------------------------------------------
487 
    -- Pattern according to "Timing waveform of CKE_n operation", page 22
488 
    ---------------------------------------------------------------------------------------------
489 
    OE_n   <= '1' AFTER clk_periode * 1.5 - tOE;
490 
    WAIT UNTIL FALLING_EDGE (Clk);
491 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A10#, A_width));
492 
    WE_n   <= '1';
493 
    random := lcg (random);
494 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 - 1 DOWNTO 0));
495 
 
496 
    OE_n   <= '0' AFTER clk_periode * 1.5 - tOE;
497 
    WAIT UNTIL FALLING_EDGE (Clk);
498 
    CKE_n  <= '1';
499 
    random_vector (A, random);
500 
    random := lcg (random);
501 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
502 
    CS2    <= TO_UNSIGNED (random, 32)(1);
503 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
504 
    ADV    <= TO_UNSIGNED (random, 32)(3);
505 
    WE_n   <= TO_UNSIGNED (random, 32)(4);
506 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 4 DOWNTO 5));
507 
 
508 
    WAIT UNTIL FALLING_EDGE (Clk);
509 
    CKE_n  <= '0';
510 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A20#, A_width));
511 
    WE_n   <= '0';
512 
    BW_n   <= (D_width / 9 - 1 DOWNTO 0 => '0');
513 
    CS1_n  <= '0';
514 
    CS2    <= '1';
515 
    CS2_n  <= '0';
516 
    ADV    <= '0';
517 
 
518 
    WAIT UNTIL FALLING_EDGE (Clk);
519 
    CKE_n  <= '1';
520 
    random_vector (A, random);
521 
    random := lcg (random);
522 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
523 
    CS2    <= TO_UNSIGNED (random, 32)(1);
524 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
525 
    ADV    <= TO_UNSIGNED (random, 32)(3);
526 
    WE_n   <= TO_UNSIGNED (random, 32)(4);
527 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 4 DOWNTO 5));
528 
 
529 
    WAIT UNTIL FALLING_EDGE (Clk);
530 
    CKE_n  <= '0';
531 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A30#, A_width));
532 
    CS1_n  <= '0';
533 
    CS2    <= '1';
534 
    CS2_n  <= '0';
535 
    ADV    <= '0';
536 
    WE_n   <= '1';
537 
    random := lcg (random);
538 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 - 1 DOWNTO 0));
539 
 
540 
    WAIT UNTIL FALLING_EDGE (Clk);
541 
    CKE_n  <= '1';
542 
    random_vector (A, random);
543 
    random := lcg (random);
544 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
545 
    CS2    <= TO_UNSIGNED (random, 32)(1);
546 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
547 
    ADV    <= TO_UNSIGNED (random, 32)(3);
548 
    WE_n   <= TO_UNSIGNED (random, 32)(4);
549 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 4 DOWNTO 5));
550 
 
551 
    WAIT UNTIL FALLING_EDGE (Clk);
552 
    CKE_n  <= '1';
553 
    random_vector (A, random);
554 
    random := lcg (random);
555 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
556 
    CS2    <= TO_UNSIGNED (random, 32)(1);
557 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
558 
    ADV    <= TO_UNSIGNED (random, 32)(3);
559 
    WE_n   <= TO_UNSIGNED (random, 32)(4);
560 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 4 DOWNTO 5));
561 
 
562 
    WAIT UNTIL FALLING_EDGE (Clk);
563 
    CKE_n  <= '0';
564 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A40#, A_width));
565 
    CS1_n  <= '0';
566 
    CS2    <= '1';
567 
    CS2_n  <= '0';
568 
    ADV    <= '0';
569 
    WE_n   <= '1';
570 
    random := lcg (random);
571 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 - 1 DOWNTO 0));
572 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D2#, D_width));
573 
 
574 
    WAIT UNTIL FALLING_EDGE (Clk);
575 
    CKE_n  <= '1';
576 
    random_vector (A, random);
577 
    random := lcg (random);
578 
    CS1_n  <= TO_UNSIGNED (random, 32)(0);
579 
    CS2    <= TO_UNSIGNED (random, 32)(1);
580 
    CS2_n  <= TO_UNSIGNED (random, 32)(2);
581 
    ADV    <= TO_UNSIGNED (random, 32)(3);
582 
    WE_n   <= TO_UNSIGNED (random, 32)(4);
583 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 4 DOWNTO 5));
584 
    D      <= (D_width - 1 DOWNTO 0 => 'Z');
585 
 
586 
    WAIT UNTIL FALLING_EDGE (Clk);
587 
    CKE_n  <= '0';
588 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A50#, A_width));
589 
    WE_n   <= '0';
590 
    BW_n   <= (D_width / 9 - 1 DOWNTO 0 => '0');
591 
    CS1_n  <= '0';
592 
    CS2    <= '1';
593 
    CS2_n  <= '0';
594 
    ADV    <= '0';
595 
 
596 
    WAIT UNTIL FALLING_EDGE (Clk);
597 
    CKE_n  <= '0';
598 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A60#, A_width));
599 
    BW_n   <= (D_width / 9 - 1 DOWNTO 0 => '0');
600 
 
601 
    ---------------------------------------------------------------------------------------------
602 
    -- Pattern according to "Timing waveform of nCS operation", page 23
603 
    ---------------------------------------------------------------------------------------------
604 
    OE_n   <= '1' AFTER clk_periode * 1.5 - tOE;
605 
    WAIT UNTIL FALLING_EDGE (Clk);
606 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A10#, A_width));
607 
    WE_n   <= '1';
608 
    random := lcg (random);
609 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 - 1 DOWNTO 0));
610 
 
611 
    WAIT UNTIL FALLING_EDGE (Clk);
612 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A20#, A_width));
613 
    random := lcg (random);
614 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 - 1 DOWNTO 0));
615 
 
616 
    OE_n   <= '0' AFTER clk_periode * 1.5 - tOE;
617 
    WAIT UNTIL FALLING_EDGE (Clk);
618 
    random_vector (A, random);
619 
    CS1_n  <= '1';
620 
    random := lcg (random);
621 
    CS2    <= TO_UNSIGNED (random, 32)(0);
622 
    CS2_n  <= TO_UNSIGNED (random, 32)(1);
623 
    WE_n   <= TO_UNSIGNED (random, 32)(2);
624 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 2 DOWNTO 3));
625 
 
626 
    WAIT UNTIL FALLING_EDGE (Clk);
627 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A30#, A_width));
628 
    WE_n   <= '0';
629 
    BW_n   <= (D_width / 9 - 1 DOWNTO 0 => '0');
630 
    CS1_n  <= '0';
631 
    CS2    <= '1';
632 
    CS2_n  <= '0';
633 
 
634 
    WAIT UNTIL FALLING_EDGE (Clk);
635 
    random_vector (A, random);
636 
    CS1_n  <= '1';
637 
    random := lcg (random);
638 
    CS2    <= TO_UNSIGNED (random, 32)(0);
639 
    CS2_n  <= TO_UNSIGNED (random, 32)(1);
640 
    WE_n   <= TO_UNSIGNED (random, 32)(2);
641 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 2 DOWNTO 3));
642 
 
643 
    WAIT UNTIL RISING_EDGE (Clk);
644 
    WE_n   <= '1' AFTER tWH;
645 
    WAIT UNTIL FALLING_EDGE (Clk);
646 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A40#, A_width));
647 
    CS1_n  <= '0';
648 
    CS2    <= '1';
649 
    CS2_n  <= '0';
650 
    random := lcg (random);
651 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 - 1 DOWNTO 0));
652 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D3#, D_width));
653 
 
654 
    WAIT UNTIL FALLING_EDGE (Clk);
655 
    random_vector (A, random);
656 
    CS1_n  <= '1';
657 
    random := lcg (random);
658 
    CS2    <= TO_UNSIGNED (random, 32)(0);
659 
    CS2_n  <= TO_UNSIGNED (random, 32)(1);
660 
    WE_n   <= TO_UNSIGNED (random, 32)(2);
661 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 2 DOWNTO 3));
662 
    D      <= (D_width - 1 DOWNTO 0 => 'Z');
663 
 
664 
    WAIT UNTIL FALLING_EDGE (Clk);
665 
    A      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#A50#, A_width));
666 
    WE_n   <= '0';
667 
    BW_n   <= (D_width / 9 - 1 DOWNTO 0 => '0');
668 
    CS1_n  <= '0';
669 
    CS2    <= '1';
670 
    CS2_n  <= '0';
671 
 
672 
    WAIT UNTIL FALLING_EDGE (Clk);
673 
    random_vector (A, random);
674 
    CS1_n  <= '1';
675 
    random := lcg (random);
676 
    CS2    <= TO_UNSIGNED (random, 32)(0);
677 
    CS2_n  <= TO_UNSIGNED (random, 32)(1);
678 
    WE_n   <= TO_UNSIGNED (random, 32)(2);
679 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 2 DOWNTO 3));
680 
 
681 
    WAIT UNTIL FALLING_EDGE (Clk);
682 
    random_vector (A, random);
683 
    random := lcg (random);
684 
    CS2    <= TO_UNSIGNED (random, 32)(0);
685 
    CS2_n  <= TO_UNSIGNED (random, 32)(1);
686 
    WE_n   <= TO_UNSIGNED (random, 32)(2);
687 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 2 DOWNTO 3));
688 
    D      <= STD_LOGIC_VECTOR (TO_UNSIGNED (16#D5#, D_width));
689 
 
690 
    WAIT UNTIL FALLING_EDGE (Clk);
691 
    random_vector (A, random);
692 
    random := lcg (random);
693 
    CS2    <= TO_UNSIGNED (random, 32)(0);
694 
    CS2_n  <= TO_UNSIGNED (random, 32)(1);
695 
    WE_n   <= TO_UNSIGNED (random, 32)(2);
696 
    BW_n   <= STD_LOGIC_VECTOR (TO_UNSIGNED (random, 32)(D_width / 9 + 2 DOWNTO 3));
697 
    D      <= (D_width - 1 DOWNTO 0 => 'Z');
698 
 
699 
    WAIT UNTIL FALLING_EDGE (Clk);
700 
  END PROCESS pPatternGenerator;
701 
END ARCHITECTURE deterministic;

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