AN 037
© Kionix 2012
Rev 1.3
July 30, 2012
Page 1 of 3
Introduction
The purpose of this application note is to illustrate how the Kionix KXCJK
accelerometer can replace an existing Kionix KXTIK accelerometer.
Pin Compatibility
The Kionix KXTIK accelerometer can be replaced by a KXCJK accelerometer for an
I2C bus application as shown in the table below:
Existing Kionix KXTIK
Replace with Kionix KXCJK
Pin
Name
Description
1
IO Vdd
The power supply input for the digital communication
bus. Optionally decouple this pin to ground with a
0.1uF ceramic capacitor.
2
RES
Reserved – Not Connected Internally
3
DNC
Reserved – Do Not Connect
4
SCL
I
2
C Serial Clock
5
GND
Ground
6
SDA
I
2
C Serial Data
7
NC
Not Internally Connected – Can be connected to Vdd,
GND or Float
8
RES
Reserved – connect to IO Vdd
9
RES
Reserved – Internally connected to GND – Can be
connected to GND or Float
10
RES
Reserved – Internally connected to GND – Can be
connected to GND or Float
11
INT
Physical Interrupt
12
GND
Ground
13
RES
Reserved – Internally connected to GND – Can be
connected to GND or Float
14
Vdd
The power supply input. Decouple this pin to ground
with a 0.1uF ceramic capacitor.
15
NC
Not Internally Connected – Can be connected to Vdd,
GND or Float
16
RES
Reserved – Internally connected to GND – Can be
connected to GND or Float
Pin
Name
Description
1
IO Vdd
The power supply input for the digital communication
bus. Optionally decouple this pin to ground with a
0.1uF ceramic capacitor.
2
NC
Not Internally Connected – Can be connected to Vdd,
GND or Float
3
NC
Not Internally Connected – Can be connected to Vdd,
GND or Float
4
SCL
I
2
C Serial Clock
5
GND
Ground
6
SDA
I
2
C Serial Data
7
ADDR
I
2
C programmable address bit
8
RES
Reserved – connect to IO Vdd
9
RES
Reserved – Internally connected to GND – Can be
connected to GND or Float
10
RES
Reserved – Internally connected to GND – Can be
connected to GND or Float
11
INT
Physical Interrupt
12
GND
Ground
13
NC
Not Internally Connected – Can be connected to Vdd,
GND or Float
14
Vdd
The power supply input. Decouple this pin to ground
with a 0.1uF ceramic capacitor.
15
NC
Not Internally Connected – Can be connected to Vdd,
GND or Float
16
NC
Not Internally Connected – Can be connected to Vdd,
GND or Float
Figure 1
1
2
3
5
7
9
11
12
13
Vdd
C
1
SDA
KXTIK
INT
IO Vdd
C
2
4
SCL
86
15 1416
10
1
2
3
5
7
9
11
12
13
Vdd
C
1
SDA
KXCJK
INT
IO Vdd
C
2
4
SCL
86
15 1416
10
ADDR
AN 037
© Kionix 2012
Rev 1.3
July 30, 2012
Page 2 of 3
KXCJK Key Differences
The following are key differences in hardware and software between the KXTIK and
the KXCJK tri-axis accelerometer:
• Pin 3 for KXCJK can be connected to Vdd, GND, or Float.
• Pin 7 for KXCJK is used for the I2C Address line.
• The I2C Slave Address associated with the KXCJK is 000111X, where the
programmable bit, X, is determined by the assignment of ADDR (pin 7) to
GND or Vdd.
• Device functions and performance differences may exist, see product
specifications for details.