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PART NUMBER:
± 2g / 4g / 8g Tri-axis Digital
Accelerometer Specifications
KXTF9-4100
Rev. 6
Jun-2011
WUF_THRESH
This register sets the acceleration threshold, WUF Threshold that is used to detect a general motion
input. The KXTF9 will ship from the factory with WUF_THRESH set to a change in acceleration of
0.5g. Note that to properly change the value of this register, the PC1 bit in CTRL_REG1 must first be
set to “0”.
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset Value
WUFTH7 WUFTH6 WUFTH5 WUFTH4 WUFTH3 WUFTH2 WUFTH1 WUFTH0
00001000
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
I C Address: 0x5Ah
2
TILT_ANGLE
This register sets the tilt angle that is used to detect the transition from Face-up/Face-down states to
Screen Rotation states. The KXTF9 ships from the factory with tilt angle set to a low threshold of 26°
from horizontal. A different default tilt angle can be requested from the factory. Note that the minimum
suggested tilt angle is 10°. Note that to properly change the value of this register, the PC1 bit in
CTRL_REG1 must first be set to “0”.
R/W
TA7
Bit7
R/W
TA6
Bit6
R/W
TA5
Bit5
R/W
TA4
Bit4
R/W
TA3
Bit3
R/W
TA2
Bit2
R/W
TA1
Bit1
R/W
TA0
Bit0
Reset Value
00001100
I C Address: 0x5Ch
2
HYST_SET
This register sets the Hysteresis that is placed in between the Screen Rotation states. The KXTF9
ships from the factory with HYST_SET set to +/-15° of hysteresis. A different default hysteresis can be
requested from the factory. Note that when writing a new value to this register the current values of
RES0, RES1, RES2 and RES3 must be preserved. These values are set at the factory and must not
change. Note that to properly change the value of this register, the PC1 bit in CTRL_REG1 must first
be set to “0”.
R/W
RES2
Bit7
R/W
RES1
Bit6
R/W
RES0
Bit5
R/W
HYST4
Bit4
R/W
HYST3
Bit3
R/W
HYST2
Bit2
R/W
HYST1
Bit1
R/W
HYST0
Bit0
Reset Value
---10100
I C Address: 0x5Fh
2
36 Thornwood Dr. – Ithaca, NY 14850
tel: 607-257-1080 – fax:607-257-1146
www.kionix.com - info@kionix.com
? 2010 Kionix – All Rights Reserved
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