Rainbow-electronics LM93 Bedienungsanleitung PDF herunterladen (Seite 75)

16.0 Registers (Continued)

16.8.19 Register CEh PWM2 Control 3

Address

Read/

Write

Name

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

Default

Value

CEh R/W

PWM2

Control 3

SU_DUR RES SU_DC 00h

Bit Name R/W Description

3:0 SU_DC R/W This field sets the duty cycle that used whenever

PWM2 experiences a Spin-Up cycle. This field

accepts 16 possible values that are mapped to duty

cycles according the table in the Auto-Fan Control

section. Setting this field to 0h effectively disables

Spin-Up.

4 RES R Reserved

7:5 SU_DUR R/W Sets the Spin-Up duration for PWM2.

Bits 7:5 configure the spin-up duration. When the duty cycle of PWM2 changes from zero to a non-zero value, the spin-up

sequence is activated for the specified amount of time. The available settings are defined according to this table:

SU_DUR Spin-Up Time

0h Spin-up disabled

1h 100 ms

2h 250 ms

3h 400 ms

4h 700 ms

5h 1000 ms

6h 2000 ms

7h 4000 ms

16.8.20 Register CFh Special Function PWM2 Control 4

Address

Read/

Write

Name

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

Default

Value

CFh R/W

Special Function

PWM2

Control 4

RES RES RES RES RES FREQ2 00h

Bit Name R/W Description

2:0 FREQ2 R/W PWM2 frequency control. Controls the frequency of

the PWM2 output in the same fashion as FREQ1 in

the PWM1 Control 4 register.

7:3 RES R Reserved

LM93

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