Rainbow-electronics LM93 Manual de usuario descargar pdf (Pagina 66)

16.0 Registers (Continued)

16.8.8 Register C3h Zones 1/2 MinPWM and Hysteresis

Address

Read/

Write

Name

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

Default

Value

C3h R/W

Zones 1/2

MinPWM and

Hysteresis

MinPWM FC_TH N/D

Bit Name R/W Description

3:0 FC_TH R/W This field sets the amount of hysteresis (in degrees

C) that is used by the auto-fan control for zones 1

and 2. This should be set greater than 0 to avoid

unwanted oscillation between two steps in the look-up

table.

7:4 MinPWM R/W This field determines the duty cycle that the auto-fan

control requests for zones 1 and 2 if the temperature

for the given zone falls below the programmed base

temperature for that zone. This field accepts 16

possible values that are mapped to duty cycles

according the table in the Auto-Fan Control section.

16.8.9 Register C4h Zones 3/4 MinPWM and Hysteresis

Address

Read/

Write

Name

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

Default

Value

C4h R/W

Zones 3/4

MinPWM and

Hysteresis

MinPWM FC_TH N/D

Bit Name R/W Description

3:0 FC_TH R/W This field sets the amount of hysteresis (in degrees

C) that is used by the auto-fan control for zones 3

and 4. This should be set greater than 0 to avoid

unwanted oscillation between two steps in the look-up

table.

7:4 MinPWM R/W This field determines the duty cycle that the auto-fan

control requests for zones 3 and 4 if the temperature

for the given zone falls below the programmed base

temperature for that zone. This field accepts 16

possible values that are mapped to duty cycles

according the table in the Auto-Fan Control section.

LM93

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