номер детали：DAC38RF85
Привет μ A。
Обратил внимание、что выходной сигнал после включения может иметь другой уровень。
в каждом случае я читаю регистр x05 и вижу、что ФАПЧ заблокирована。
в x06 значение PLL_LFVOLT равно 3。
после того μ F、как я изменяю значения регистра X33 (напряжение настройки VCO)、уровень сигнала увеличивается μ F。
Разбираясь с причинами、я заметил、что ЦАП работает только тогда、когда регистры настроены、прежде чем я настрою очиститель часов。
только в этом случае ФАПЧ блокируется μ V、и ЦАП генерирует сигнал μ V 同步
Я использую ЦАП в режиме подкласса 0。
DAC_clk 6000 МГц、
1 μ A пара строк кратная интерполяция、8 μ A、6 μ A。
LMFS-HD - 8-2-1-2-1
Входная частота-МГц μ A、и я использую внутреннюю ФАПЧ для генерации тактовой частоты ЦАП МГц 6000 μ A。
Частота МГц SYSREF -(6000/6)/(K * N)= 1000 /(25 * 8)= 5 μ A。
Настройки моих регистров：
0 => x "5860"、-x "000"
1 => x "3000"、-x "001"
2 => x "FFF"、-x "002"
3 => x "FFF"、-x "003"
4 => x "00fe"、-x "004"
5 => x "0007"、-x "005"
6 => x "0004"、-x "009"
7 => x "7c03"、-x "40a"
8 => x "0002"、-x "40b"
9 => x "A002"、-x "40c"
10 => x "b000"、- x "40d"
11 => x "0000"、-x "41B"
12 => x "FFF"、-x "423"
13 => x "1001"、-x "424"
14 => x«0400»、-x "431"
15 => x "0b08"、-x "432"
16 => x "483C"、-x "433"
17 => x "0000"、-x "434"
18 => x "0018"、-x "435"
19 => x "9002"、-x "43B"
20 => x "8029"、-x "43c"
21 => x "0088"、- x "43d"
22 => x "0929"、-x "43E"21 => x "0088"、-x "43d" 22 => x "0929"、-x "43E"21=> x "0088"、-x "43d" 22 => x "0929"、-x "43E"
23 => x "0000"、-x "43f"
24 => x "0001"、-x "009"
25 => x "8310"、-x "10a"
26 => x "26a2"、-x "10c"
27 => x "0000"、-x "10d"
28 => x "00ff"、-x "10e"
29 => x "FFF"、-x "10f"
30 => x "FFF"、-x "110"
31 => x "FFF"、-x "111"
32 => x "0000"、-x "117"
33 => x "0001"、- x "119"
34 => x "0000"、-x "11c"
35 => x "0000"、-x "11d"
36 => x "33333"、--x "11e"
37 => x«3333»、-x "11F"
38 => x "333333"、-x "120"
39 => x "0000"、-x "121"
40 => x "0000"、-x "122"
41 => x "0000"、-x "123"
42 => x "0010"、-x "124"
43 => x "6300"、-x "125"
44 => x "8888"、- x "127"
45 => x "0330"、-x "128"44 => x "888"、-x "127" 45 => x "0330"、-x "128"44 => x "88888"、-x "127" 45 => x "0330"、-x "128"
46 => x "0000"、-x "129"
47 => x "0000"、-x "12a"
48 => x "0000"、-x "12b"
49 => x "0000"、-x "12c"
50 => x "1fff"、-x "12d"
51 => x "1fff"、-x "12e"
52 => x "0000"、-x "12F"
53 => x "0000"、-x "130"
54 => x "0400"、-x "132"
55 => x "0400"、-x "133"
56 => x "0044"、- x "146"
57 => x "190A"、-x "147"
58 => x "31c1"、-x "148"
59 => x "FF03"、-x "14a"
60 => x«1300»、-x»14b"
61 => x" 1807 "、-x" 14c "
62 => x" 0101 "、-x" 14d "
63 => x" 0f4f "、-x" 14e "
64 => x" 1c60 "、--x" 14F "
65 => x" 0000 "、-x" 150 "
66 => x" 001f "、-x" 151"
67 => x" 00ff "、-x" 152 "
68 => x "0100"、-x "153" x "00ff"、-x "152" 68 => x "0100"、-x "153" x "00ff"、-x "152" 68 => x "0100"、-x "153"
69 => x "8e60"、-x "154"
70 => x "0001"、-x "15c"
71 => x "0000"、-x "15e"
72 => x "0123"、-x "15F"
73 => x "7654 "、-x "160"
74 => x "0000"、-x "164"
75 => x "0000"、-x "165"
76 => x "0000"、-x "166"
77 => x "0000"、-x "167"
78 => x "0000"、-x "168"
79 => x "0000"、- x "169"
80 => x "0000"、-x "16A"
81 => x "0000"、-x "16b"
82 => x "0000"、-x "16c"
83 => x«0000»、-x«16d»
84 => x "0000"、-x "16e"
85 => x "0002"、-x "009"
86 => x "8310"、-x "20A"
87 => x "2402"、-x "20c"
88 => x "0000"、-x "20d"
89 => x "00ff"、-x "20e"
90 => x "FFF"、-x "20f"
91 => x "FFFFF"、-x "210"FFF"、-x" 20f " 91 => x "FFF"、-x" 210 "FFF"、-x" 20f " 91 => x "FFF"、-x" 210 "
92 => x "FFF"、-x "211"
93 => x "0000"、-x "217"
94 => x "0001"、-x "219"
95 => x "0000"、-x "21c"
96 => x "0000"、-x "21d"
97 => x "0000"、-x "21e"
98 => x "0000"、-x "21f"
99 => x "0000"、-x "220"
100 => x "0000"、-x "221"
101 => x "0000"、-x "222"
102 => x "0000"、- x "223"
103 => x "0020"、-x "224"
104 => x "6300"、-x "225"
105 => x "888"、-x "227"
106 => x "0330"、-x "228"
107 => x" 0000 "、-x" 229 "
108 => x" 0000 "、-x" 22a "
109 => x" 0000 "、-x" 22b "
110 => x" 0000 "、-x" 22c "
111 => x" 1fff "、--x" 22d "
112 => x" 1fff "、-x" 22E "
113 => x" 0000 "、-x" 22F "
114 => x "0000"、-x "230"113 => x "0000"、-x "22F" 114 => x "0000"、-x "230"113 => x "0000"、-x "22F" 114 => x "0000"、-x "230"
115 => x "0400"、-x "232"
116 => x "0400"、-x "233"
117 => x "0044"、-x "246"
118 => x "190A"、-x "247"
119 => x "31c3"、-x "248"
120 => x "0003"、-x "24a"
121 => x "1300"、-x "24b"
122 => x "1307"、-x "24c"
123 => x "0101"、-x "24d"
124 => x "0f4f"、-x "24e"
125 => x "1c60"、- x "24f"
126 => x "0000"、-x "250"
127 => x "001f"、-x "251"
128 => x "00ff"、-x "252"
129 => x«0100»、-x "253"
130 => x "8e60"、-x "254"
131 => x "0003"、-x "25c"
132 => x "0000"、-x "25e"
133 => x "3210"、-x "25F"
134 => x "5764"、-x "260"
135 => x "0000"、-x "264"
136 => x "0000"、- x "265"
137 => x "0000"、-x "266"264 " 136 => x" 0000 "、-x" 265 " 137 => x" 0000 "、-x" 266 "264 " 136 => x" 0000 "、-x" 265 " 137 => x" 0000 "、-x" 266 "
138 => x "0000"、-x "267"
139 => x "0000"、-x "268"
140 => x "0000"、-x "269"
141 => x "0000"、-x "26A"
142 => x "0000"、-x "26B"
143 => x "0000"、-x "26c"
144 => x "0000"、-x "26D"
145 => x "0000"、-x "26E"
146 => x "0001"、-x "009"
147 => x "0332"、-x "128"
148 => x "0330"、- x "128"
149 => x "0332"、-x "128"
150 => x "0330"、-x "128"
151 => x "0000"、-x "009"
152 => x«5861»、-x«000»
153 => x«5860»、-x«000»
Я изменил настройки регистров согласно 8.3.11
•Поле SYSREF_MODE в регистре JESD_SYSR_MODE (8.5.56)= 0
•Поле DISABLE_ERR_RPT в регистре JESD_ERR_OUT (8.5.53)= 1.
•Поле MIN_DERATY_ENA в регистре JESD_MATCH (8.5.50)= 1
но это не имело никакого эффекта μ A。
时钟分频器寄存器0x24使用 Кроме того、я не знаю、какое значение установить в регистре SYSREF、поле SYSREF_MODE для режима подкласса 0。
Поле AUTOLOAD_DONE не установлено в«»после сброса по непонятным мне причинам 1 μ A。
