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AN 009
SPI Schematic
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Enable
X
Y
Z
FF/MOT
MOT Enable
C
1
SCLK
SDO
SDI
KXPS5
CS
Vdd
Vdd
Logic Input
Logic Output
Logic Input or RC
Master Clock
Logic Input
Logic Output
Logic Input
GND
SPI
C
4
C
3
C
2
Figure 2. Schematic for SPI Operation
RC Enable
A good design practice is to control the KXPS5 Enable pin (6) with a
microprocessor, but it is also possible to enable the KXPS5 using the RC circuit
shown in Figure 3. This circuit will transition the Enable pin high at power on,
properly enabling the accelerometer after power has been supplied. Note that the
RC values are just recommendations, therefore the final schematic may differ
based on application needs.
Enable
6
Vdd
10Kohm
0.1uf
Figure 3. Schematic for RC Enable
© Kionix 2006
9 March 2006
Page 2 of 6
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