f75386 Feature Integration Technology Inc., f75386 Datasheet - Page 18
f75386
Manufacturer Part Number
f75386
Description
Dual ?1o C Accuracy Temperature Sensor Ic With Fan Speed Control
Manufacturer
Feature Integration Technology Inc.
Datasheet
1.F75386.pdf
(28 pages)
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
-14-
Description
Description
F75386
July,
V0.27P
2007