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PART NUMBER:
± 2g / 4g / 8g Tri-axis Digital
Accelerometer Specifications
KXTF9-4100
Rev. 6
Jun-2011
TDT_LATENCY_TIMER
This register contains counter information for the detection of a tap event. Every count is calculated as
1/ODR delay period, where the ODR is user-defined per Table 17. In order to ensure that only tap
events are detected, this time limit is used. This register sets the total amount of time that the tap
algorithm will count samples that are above the PI threshold (TDT_L_THRESH) during a potential tap
event. It is used during both single and double tap events. However, reporting of single taps on the
physical interrupt pin (7) will occur at the end of the TDT_WINDOW_TIMER. The Kionix recommended
default value for TDT_LATENCY_TIMER is 0.1 seconds (0x28h). Note that to properly change the
value of this register, the PC1 bit in CTRL_REG1 mu st first be set to “0”.
R/W
TLT7
Bit7
R/W
TLT6
Bit6
R/W
TLT5
Bit5
R/W
TLT4
Bit4
R/W
TLT3
Bit3
R/W
TLT2
Bit2
R/W
TLT1
Bit1
R/W
TLT0
Bit0
Reset Value
00101000
I C Address: 0x30h
2
TDT_WINDOW_TIMER
This register contains counter information for the detection of single and double taps. Every count is
calculated as 1/ODR delay period, where the ODR is user-defined per Table 17. It defines the time
window for the entire tap event, single or double, to occur. Reporting of single taps on the physical
interrupt pin (7) will occur at the end of this tap window. The Kionix recommended default value for
TDT_WINDOW_TIMER is 0.4 seconds (0xA0h). Note that to properly change the value of this register,
the PC1 bit in CTRL_REG1 must first be set to “0”.
R/W
TWS7
Bit7
R/W
TWS6
Bit6
R/W
TWS5
Bit5
R/W
TWS4
Bit4
R/W
TWS3
Bit3
R/W
TWS2
Bit2
R/W
TWS1
Bit1
R/W
TWS0
Bit0
Reset Value
10100000
I C Address: 0x31h
2
SELF_TEST
When 0xCA is written to this register, the MEMS self-test function is enabled. Electrostatic-actuation of
the accelerometer, results in a DC shift of the X, Y and Z axis outputs. Writing 0x00 to this register will
return the accelerometer to normal operation.
R/W
1
Bit7
R/W
1
Bit6
R/W
0
Bit5
R/W
0
Bit4
R/W
1
Bit3
R/W
0
Bit2
R/W
1
Bit1
R/W
0
Bit0
Reset Value
00000000
I C Address: 0x3Ah
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
425-2397-1106241613
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