f75386 Feature Integration Technology Inc., f75386 Datasheet - Page 18

• Manufacturer Part Number: f75386
• Description: Dual ?1o C Accuracy Temperature Sensor Ic With Fan Speed Control
• Manufacturer: Feature Integration Technology Inc.

F75386
7.10 FINTEK PWM Control Register  Index 31h (Fintek Mode)
7.11 PWM Control and Fan Monitor Register Index 4Ah
7.12 Fan Spin-Up Configuration Register  Index 4Bh
6-0
7-6
1-0
Bit
Bit
Power on default <7:0> = 00h
Power on default <7:0> = 20h
Power on default<7:0> = 3Fh
7
5
4
3
2
PWM_CLK_SEL
Tachometer Mode
FTK_PWMCLK_SEL
PWM_MODE
PWM_INV
Reserved
FTK_PREDIV
Reserved
Name
Name
Attribute
R/W
R/W
R/W
R/W
R/W
RO
Attribute
R/W
R/W
00: Traditional Tachometer Input Mode
01: Improved Traditional Tachometer Input Mode
10: Most Accurate Mode
11: Least Effort Mode
Note: If the PWM Clock is 333 kHz, Traditional Tachometer Input Mode is always used.
These bits are not used and always set to 0
0: operates in TEMPERATURE mode. PWMOUT duty-cycle is automatically adjusted
according to the T-P (Temperature vs. PWM) lookup table. Look-up table is locked.
1: operates in MANUAL mode. Software set the PWMOUT duty-cycle directly. Look-up
table is programmable.
0: PWM output will be 0 V to turn off FAN and open (High-Z) to turn on fan.
1: PWM output will be open to turn off FAN and 0 V to turn on fan.
1: PWMOUT frequency source is 333 kHz.
0: PWMOUT frequency source is 1.4 kHz.
This bit is not used and always set to 0
Set to 0, PWM source clock is 2 MHz.
Set to 1, PWM source clock is 200 kHz.
Set to 0 or 1 makes no different. PWM clock is divided by this value.
PWM clock = PWMOUT source clock/FTK_PREDIV
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Description
Description
F75386
July,
V0.27P
2007