Rainbow Electronics LM93 - Manual (Page 75)

16.0 Registers
(Continued)
16.8.19 Register CEh PWM2 Control 3
Register
Address
Read/
Write
Register
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
Register
Address
Read/
Write
Register
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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