CMA3000-D0X Series
7
Application information
7.1 Pin Description
CMA3000 pin numbers are presented in Figure 14 below and pin descriptions in Table 11.
Z
X
Y
Figure 13. CMA3000 sensing directions
Table 11. CMA3000 pin descriptions
Figure 14. CMA3000 pin numbers
Pin # Name
CMA3000-D01
1
2
3
4
5
6
7
8
VDD
Supply voltage
Ground
VSS
DVIO
I/O Supply
MISO
SPI Serial Data Output (MISO)
SCK_SCL
MOSI_SDA
CSB
SPI Serial Clock (SCK) / I2C Serial Clock (SCL)
SPI Serial Data Input (MOSI) / I2C Serial Data (SDA)
Chip select / I2C enable
INT
Interrupt
7.2 Recommended circuit diagram
1. Connect 100 nF SMD capacitor between each supply voltage and ground level.
2. Use separate regulator for digital IO supply (DVIO).
3. Serial interface (SPI or I2C) logical '1' level is determined by DVIO supply voltage level.
Recommended circuit diagram for the CMA3000 with SPI interface is presented in Figure 15 below.
I2C
SPI
8
7
6
5
1
2
3
4
8
7
6
5
1
2
3
4
VDD
VDD
INT
INT
VDD
VSS
INT
VDD
VSS
INT
CSB
MOSI
SCK
CSB
CSB
SDA
SCL
MOSI_SDA
SCK_SCL
DVIO
MISO
DVIO
MISO
MOSI_SDA
SCK_SCL
DVIO
DVIO
MISO
100n
100n
100n
100n
Figure 15 Recommended circuit diagrams for CMA3000-D0X
VTI Technologies Oy
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Doc.Nr. 8281000.12
Rev. 0.12
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