Rainbow Electronics LM96000 - Manual (Page 23)

Functional Description
(Continued)
25.7KHz PWM Frequency
PWM Duty Cycle
Level (%) Value in Decimal Value in Hex
0 0 0
7.14 1 - 17 01 - 11
14.29 18 - 36 12 - 24
21.43 37 - 54 25 - 36
28.57 55 - 72 37 - 48
35.71 73 - 90 49 - 5A
42.86 91 - 109 5B - 6D
50.00 110 - 127 6E - 7F
57.14 128 - 145 80 - 91
64.29 146 - 164 92 - A4
71.43 165 - 182 A5 - B6
78.57 183 - 200 B7 - C8
85.71 201 - 218 C9 - DA
92.86 219 - 237 DB - ED
100.00 238 - 255 EE - FF
27.7KHz PWM Frequency
PWM Duty Cycle
Level (%) Value in Decimal Value in Hex
0 0 0
7.69 1 - 19 01 - 13
15.38 20 - 38 14 - 26
23.08 39 - 58 27 - 3A
30.77 59 - 78 3B - 4E
38.46 79 - 97 4F - 61
27.7KHz PWM Frequency
PWM Duty Cycle
Level (%) Value in Decimal Value in Hex
46.15 98 - 117 62 - 75
53.85 118 - 137 76 - 89
61.54 138 - 157 8A - 9D
69.23 158 - 176 9E - B0
76.92 177 - 196 B1 - C4
84.62 197 - 216 C5 - D8
92.31 217 - 235 D9 - EB
100.00 236 - 255 EC - FF
30KHz PWM Frequency
PWM Duty Cycle
Level (%) Value in Decimal Value in Hex
0 0 0
8.33 1 - 20 01 - 14
16.67 21 - 42 15 - 2A
25.00 43 - 63 2B - 3F
33.33 64 - 84 40 - 54
41.67 85 - 106 55 - 6A
50.00 107 - 127 6B - 7F
58.33 128 - 148 80 - 94
66.67 149 - 170 95 - AA
75.00 171 - 191 AB - BF
83.33 192 - 212 C0 - D4
91.67 213 - 234 D5 - EA
100.00 235 - 255 EB - FF
4.18 Registers 67-69h: Temperature Limit
Register
Address
Read/
Write
Register
Name
Bit 7
(MSB)
Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
(LSB)
Default
Value
Lock?
67h R/W Zone1 Fan Temp Limit 7 6 5 4 3 2 1 0 5Ah U
68h R/W Zone2 Fan Temp Limit 7 6 5 4 3 2 1 0 5Ah U
69h R/W Zone3 Fan Temp Limit 7 6 5 4 3 2 1 0 5Ah U
These are the temperature limits for the individual zones. When the current temperature equals this limit, the fan will be turned
on if it is not already. When the temperature exceeds this limit, the fan speed will be increased according to the algorithm set forth
in the Auto Fan Range, PWM Frequency register description. Default = 90˚C = 5Ah
This register becomes Read Only when the Ready/Lock/Start/Override register Lock bit is set. Any further attempts to write to this
register shall have no effect. After power up the default value is used whenever the Ready/Lock/Start/Override register Start bit
is cleared even though modifications to this register are possible.
TABLE 10. Temperature Limit vs Register Setting
Temperature Reading (Decimal) Reading (Hex)
−127˚C −127 81h
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−50˚C −50 CEh
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LM96000
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