source: FPGA/FAD/FACT_FAD_test_devices_lib/usr_clocks.vhd@ 236

Last change on this file since 236 was 215, checked in by dneise, 16 years ago
initial commit (2nd part): only VHDL and UCF files were commited.
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1--#############################################################
2-- Author : Boris Keil, Stefan Ritt
3-- Contents : Use external 33 MHz to generate internal clocks
4-- via DCMs
5-- $Id: usr_clocks.vhd 8369 2007-07-06 14:47:25Z ritt@PSI.CH $
6--#############################################################
7
8library ieee;
9use ieee.std_logic_1164.ALL;
10-- use ieee.std_logic_arith.all;
11use ieee.std_logic_unsigned.all;
12use ieee.numeric_std.ALL;
13-- synopsys translate_off
14library UNISIM;
15use UNISIM.Vcomponents.ALL;
16-- synopsys translate_on
17
18entity usr_clocks is
19 port (
20 P_I_CLK33 : in std_logic;
21 P_I_CLK66 : in std_logic;
22 O_CLK33 : out std_logic;
23 O_CLK33_NODLL : out std_logic;
24 O_CLK66 : out std_logic;
25 O_CLK132 : out std_logic;
26 O_CLK264 : out std_logic;
27 O_CLK66_PS : out std_logic;
28 O_LOCKED : out std_logic
29 );
30end usr_clocks;
31
32architecture arch of usr_clocks is
33 attribute BOX_TYPE : STRING ;
34
35-- xilinx cores
36
37 component IBUFGDS_LVDS_25
38 port(
39 O : out std_ulogic;
40 I : in std_ulogic;
41 IB : in std_ulogic
42 );
43 end component;
44 attribute BOX_TYPE of IBUFGDS_LVDS_25 : component is "PRIMITIVE";
45
46 component BUFG
47 port(
48 O : out std_ulogic;
49 I : in std_ulogic
50 );
51 end component;
52 attribute BOX_TYPE of BUFG : component is "PRIMITIVE";
53
54 -- !!! WARNING !!! : The Virtex2Pro has a bug in the DCM
55 -- (a silicon bug, i.e. real hardware), the PLL does not
56 -- lock properly if the CLK2x output is used for
57 -- feedback -> always use CLK1x !!! (Call from Memec,
58 -- C. Grivet, 17.12.03)
59
60 component DCM
61 generic (
62 CLKDV_DIVIDE : real := 2.0;
63 CLKFX_DIVIDE : integer := 1;
64 CLKFX_MULTIPLY : integer := 4;
65 CLKIN_DIVIDE_BY_2 : boolean := false;
66 CLKIN_PERIOD : real := 0.0; --non-simulatable, in nanoseconds
67 CLKOUT_PHASE_SHIFT : string := "NONE";
68 CLK_FEEDBACK : string := "1X";
69 DESKEW_ADJUST : string := "SYSTEM_SYNCHRONOUS"; --non-simulatable
70 DFS_FREQUENCY_MODE : string := "LOW";
71 DLL_FREQUENCY_MODE : string := "LOW";
72 DSS_MODE : string := "NONE"; --non-simulatable
73 DUTY_CYCLE_CORRECTION : boolean := true;
74 -- MAXPERCLKIN : time := 1000000 ps; --simulation parameter
75 -- MAXPERPSCLK : time := 100000000 ps; --simulation parameter
76 PHASE_SHIFT : integer := 0;
77 -- SIM_CLKIN_CYCLE_JITTER : time := 300 ps; --simulation parameter
78 -- SIM_CLKIN_PERIOD_JITTER : time := 1000 ps; --simulation parameter
79 STARTUP_WAIT : boolean := false --non-simulatable
80 );
81 port (
82 CLK0 : out std_ulogic := '0';
83 CLK180 : out std_ulogic := '0';
84 CLK270 : out std_ulogic := '0';
85 CLK2X : out std_ulogic := '0';
86 CLK2X180 : out std_ulogic := '0';
87 CLK90 : out std_ulogic := '0';
88 CLKDV : out std_ulogic := '0';
89 CLKFX : out std_ulogic := '0';
90 CLKFX180 : out std_ulogic := '0';
91 LOCKED : out std_ulogic := '0';
92 PSDONE : out std_ulogic := '0';
93 STATUS : out std_logic_vector(7 downto 0) := "00000000";
94
95 CLKFB : in std_ulogic := '0';
96 CLKIN : in std_ulogic := '0';
97 DSSEN : in std_ulogic := '0';
98 PSCLK : in std_ulogic := '0';
99 PSEN : in std_ulogic := '0';
100 PSINCDEC : in std_ulogic := '0';
101 RST : in std_ulogic := '0'
102 );
103 end component;
104 attribute BOX_TYPE of DCM : component is "PRIMITIVE";
105
106 signal clk33_i, clk33, clk66_dcm1, clk66_dcm2, clk132, clk264, clk33_ps, clk66_ps : std_logic;
107 signal clk33_tmp, clk66_dcm1_tmp, clk66_dcm2_tmp, clk132_tmp, clk264_tmp, clk33_ps_tmp, clk66_ps_tmp : std_logic;
108 signal locked_dcm1, locked_dcm2, locked_dcm3 : std_logic;
109 signal dcm2_reset, dcm2_reset_n: std_logic;
110 signal dcm2_reset_delay_n: std_logic_vector(4 downto 0);
111 signal GND: std_logic;
112 signal VCC: std_logic;
113
114begin
115 GND <= '0';
116 VCC <= '1';
117
118 -- Drive clock buffer with input pad oscillator signal
119
120 inst_bufg_clk33_i: BUFG
121 port map (
122 I => P_I_CLK33,
123 O => clk33_i
124 );
125
126 O_CLK33_NODLL <= clk33_i;
127
128 -- Use clock buffers for DCM outputs
129
130 inst_bufg_clk33_dcm1: BUFG
131 port map (
132 I => clk33_tmp,
133 O => clk33
134 );
135
136 inst_bufg_clk66_dcm1: BUFG
137 port map (
138 I => clk66_dcm1_tmp,
139 O => clk66_dcm1
140 );
141
142 inst_bufg_clk66_dcm2: BUFG
143 port map (
144 I => clk66_dcm2_tmp,
145 O => clk66_dcm2
146 );
147
148 inst_bufg_clk132: BUFG
149 port map (
150 I => clk132_tmp,
151 O => clk132
152 );
153
154 inst_bufg_clk264: BUFG
155 port map (
156 I => clk264_tmp,
157 O => clk264
158 );
159
160 inst_bufg_clk33_ps: BUFG
161 port map (
162 I => clk33_ps_tmp,
163 O => clk33_ps
164 );
165
166 inst_bufg_clk66_ps: BUFG
167 port map (
168 I => clk66_ps_tmp,
169 O => clk66_ps
170 );
171
172 Inst_dcm1_clk132: DCM
173 generic map (
174 CLKDV_DIVIDE => 2.0,
175 CLKFX_DIVIDE => 1,
176 CLKFX_MULTIPLY => 4,
177 CLKIN_DIVIDE_BY_2 => false,
178 CLKIN_PERIOD => 30.0, -- in nanoseconds
179 CLKOUT_PHASE_SHIFT => "NONE",
180 CLK_FEEDBACK => "1X", -- 2X has a silicon bug ...
181 DESKEW_ADJUST => "SYSTEM_SYNCHRONOUS", -- OK ?? non-simulatable
182 DFS_FREQUENCY_MODE => "LOW",
183 DLL_FREQUENCY_MODE => "LOW",
184 DSS_MODE => "NONE", --non-simulatable
185 DUTY_CYCLE_CORRECTION => true,
186 -- MAXPERCLKIN => 1000000 ps, --simulation parameter
187 -- MAXPERPSCLK => 100000000 ps, --simulation parameter
188 PHASE_SHIFT => 0,
189 -- SIM_CLKIN_CYCLE_JITTER => 300 ps, --simulation parameter
190 -- SIM_CLKIN_PERIOD_JITTER => 1000 ps, --simulation parameter
191 STARTUP_WAIT => true --non-simulatable
192 )
193 port map (
194 -- inputs
195 CLKFB => clk33,
196 CLKIN => clk33_i,
197 DSSEN => GND,
198 PSCLK => GND,
199 PSEN => GND,
200 PSINCDEC => GND,
201 RST => GND,
202 -- outputs
203 CLK0 => clk33_tmp,
204 CLK180 => open,
205 CLK270 => open,
206 CLK2X => clk66_dcm1_tmp,
207 CLK2X180 => open,
208 CLK90 => open,
209 CLKDV => open,
210 CLKFX => clk132_tmp,
211 CLKFX180 => open,
212 LOCKED => locked_dcm1,
213 PSDONE => open,
214 STATUS => open
215
216 );
217
218 Inst_dcm2_clk264: DCM
219 generic map (
220 CLKDV_DIVIDE => 2.0,
221 CLKFX_DIVIDE => 1,
222 CLKFX_MULTIPLY => 4,
223 CLKIN_DIVIDE_BY_2 => false,
224 CLKIN_PERIOD => 15.0, -- in nanoseconds
225 CLKOUT_PHASE_SHIFT => "NONE",
226 CLK_FEEDBACK => "1X", -- 2X has a silicon bug ...
227 DESKEW_ADJUST => "SYSTEM_SYNCHRONOUS", -- OK ?? non-simulatable
228 DFS_FREQUENCY_MODE => "LOW",
229 DLL_FREQUENCY_MODE => "HIGH",
230 DSS_MODE => "NONE", --non-simulatable
231 DUTY_CYCLE_CORRECTION => true,
232 -- MAXPERCLKIN => 1000000 ps, --simulation parameter
233 -- MAXPERPSCLK => 100000000 ps, --simulation parameter
234 PHASE_SHIFT => 0,
235 -- SIM_CLKIN_CYCLE_JITTER => 300 ps, --simulation parameter
236 -- SIM_CLKIN_PERIOD_JITTER => 1000 ps, --simulation parameter
237 STARTUP_WAIT => false --non-simulatable
238 )
239 port map (
240 -- inputs
241 CLKFB => clk66_dcm2,
242 CLKIN => P_I_CLK66,
243 DSSEN => GND,
244 PSCLK => GND,
245 PSEN => GND,
246 PSINCDEC => GND,
247 RST => dcm2_reset,
248 -- outputs
249 CLK0 => clk66_dcm2_tmp,
250 CLK180 => open,
251 CLK270 => open,
252 CLK2X => open,
253 CLK2X180 => open,
254 CLK90 => open,
255 CLKDV => open,
256 CLKFX => clk264_tmp,
257 CLKFX180 => open,
258 LOCKED => locked_dcm2,
259 PSDONE => open,
260 STATUS => open
261
262 );
263
264 Inst_dcm3_clk_ps: DCM
265 generic map (
266 CLKDV_DIVIDE => 2.0,
267 CLKFX_DIVIDE => 1,
268 CLKFX_MULTIPLY => 2,
269 CLKIN_DIVIDE_BY_2 => false,
270 CLKIN_PERIOD => 30.0, -- in nanoseconds
271 CLKOUT_PHASE_SHIFT => "FIXED", -- turn on phase shifting
272 CLK_FEEDBACK => "1X", -- 2X has a silicon bug ...
273 DESKEW_ADJUST => "SYSTEM_SYNCHRONOUS", -- OK ?? non-simulatable
274 DFS_FREQUENCY_MODE => "LOW",
275 DLL_FREQUENCY_MODE => "LOW",
276 DSS_MODE => "NONE", -- non-simulatable
277 DUTY_CYCLE_CORRECTION => true,
278 -- MAXPERCLKIN => 1000000 ps, -- simulation parameter
279 -- MAXPERPSCLK => 100000000 ps, -- simulation parameter
280 --PHASE_SHIFT => -32, -- adjust for FADC
281 PHASE_SHIFT => 120, -- adjust for FADC
282 --PHASE_SHIFT => 0, -- for simulation
283 -- SIM_CLKIN_CYCLE_JITTER => 300 ps, -- simulation parameter
284 -- SIM_CLKIN_PERIOD_JITTER => 1000 ps, -- simulation parameter
285 STARTUP_WAIT => true -- non-simulatable
286 )
287 port map (
288 -- inputs
289 CLKFB => clk33_ps,
290 CLKIN => clk33_i,
291 DSSEN => GND,
292 PSCLK => GND,
293 PSEN => GND,
294 PSINCDEC => GND,
295 RST => GND,
296 -- outputs
297 CLK0 => clk33_ps_tmp,
298 CLK180 => open,
299 CLK270 => open,
300 CLK2X => clk66_ps_tmp,
301 CLK2X180 => open,
302 CLK90 => open,
303 CLKDV => open,
304 CLKFX => open,
305 CLKFX180 => open,
306 LOCKED => locked_dcm3,
307 PSDONE => open,
308 STATUS => open
309
310 );
311
312 -- DCM2 is reset while DCM1 is not locked, because DCM1 feeds DCM2.
313 -- A shift register guarantees a decent (i.e. long) reset pulse.
314 proc_delayed_reset: process (P_I_CLK33)
315 begin
316 if rising_edge(P_I_CLK33) then
317 if (locked_dcm1 = '0') then
318 dcm2_reset_delay_n <= (others => '0');
319 dcm2_reset_n <= '0';
320 else
321 dcm2_reset_delay_n <= dcm2_reset_delay_n(dcm2_reset_delay_n'high-1 downto 0) & '1';
322 dcm2_reset_n <= dcm2_reset_delay_n(dcm2_reset_delay_n'high);
323 dcm2_reset <= not dcm2_reset_n;
324 end if;
325 end if;
326 end process;
327
328 -- DCM outputs
329 O_CLK33 <= clk33;
330 O_CLK66 <= clk66_dcm1;
331 O_CLK132 <= clk132;
332 O_CLK264 <= clk264;
333 O_CLK66_PS <= clk66_ps;
334 O_LOCKED <= locked_dcm1 and locked_dcm2 and locked_dcm3;
335end arch;
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