KX022-1020 Datasheet, PDF (48/75 Pages) List of Unclassifed Manufacturers – Accelerometer Specifications

± 2g / 4g / 8g Tri-axis Digital
Accelerometer Specifications
PART NUMBER:
KX022-1020
Rev. 11.0
10-Sep-15
TDTC
This register contains counter information for the detection of a double tap event. When the Directional
TapTM ODR is 400Hz or less, every count is calculated as 1/ODR delay period. When the Directional
TapTM ODR is 800Hz, every count is calculated as 2/ODR delay period. When the Directional TapTM
ODR is 1600Hz, every count is calculated as 4/ODR delay period. The Directional TapTM ODR is
user-defined per Table 19. The TDTC counts starts at the beginning of the fist tap and it represents
the minimum time separation between the first tap and the second tap in a double tap event. More
specifically, the second tap event must end outside of the TDTC. The Kionix recommended default
value is 0.3 seconds (0x78h). Note that to properly change the value of this register, the PC1 bit in
CTRL_REG1 must first be set to “0”.
R/W
TDTC7
Bit7
R/W
TDTC6
Bit6
R/W
TDTC5
Bit5
R/W
TDTC4
Bit4
R/W
TDTC3
Bit3
R/W
R/W
R/W
TDTC2 TDTC1 TDTC0
Bit2
Bit1
Bit0
I²C Address: 0x25h
Reset Value
01111000
TTH
This register represents the 8-bit jerk high threshold to determine if a tap is detected. Though this is an
8-bit register, the register value is internally multiplied by two in order to set the high threshold. This
multiplication results in a range of 0d to 510d with a resolution of two counts. The Performance Index
(PI) is the jerk signal that is expected to be less than this threshold, but greater than the TTL threshold
during single and double tap events. Note that to properly change the value of this register, the PC1 bit
in CTRL_REG1 must first be set to “0”. The Kionix recommended default value is 203 (0xCBh) and the
Performance Index is calculated as:
X’ = X (current) – X (previous)
Y’ = Y (current) – Y (previous)
Z’ = Z (current) – Z (previous)
PI = |X’| + |Y’| + |Z’|
Equation 1: Performance Index
R/W
TTH7
Bit7
R/W
TTH6
Bit6
R/W
TTH5
Bit5
R/W
TTH4
Bit4
R/W
TTH3
Bit3
R/W
R/W
R/W
TTH2
TTH1
TTH0
Bit2
Bit1
Bit0
I²C Address: 0x26h
Reset Value
11001011
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