Rainbow-electronics LM85 Bedienungsanleitung PDF herunterladen (Seite 21)

Functional Description (Continued)

TABLE 9. PWM Duty vs Register Setting

Current Duty Value (Decimal) Value (Hex)

0% 0 00h

0.3922% 1 01h

25.098% 64 40h

50.196% 128 80h

100% 255 FFh

4.18 Registers 67-69h: Temperature Limit

Address

Read/

Write

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 43210 5AhU

68h R/W Zone2 Fan Temp Limit 7 6 5 43210 5AhU

69h R/W Zone3 Fan Temp Limit 7 6 5 43210 5AhU

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

−50˚C −50 CEh

0˚C 0 00h

50˚C 50 32h

127˚C 127 7Fh

LM85

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Rainbow-electronics LM85 Bedienungsanleitung Seite 21