CMA3000-D0X Datasheet, PDF (23/35 Pages) VTI technologies – 3-axis accelerometer

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
Figure 14. CMA3000 pin numbers
Table 11. CMA3000 pin descriptions
Pin #
1
2
3
4
5
6
7
8
Name
VDD
VSS
DVIO
MISO
SCK_SCL
MOSI_SDA
CSB
INT
CMA3000-D01
Supply voltage
Ground
I/O Supply
SPI Serial Data Output (MISO)
SPI Serial Clock (SCK) / I²C Serial Clock (SCL)
SPI Serial Data Input (MOSI) / I²C Serial Data (SDA)
Chip select / I²C enable
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.
VDD
DVIO
MISO
100n
1 _VDD
2
VSS
3 _DVIO
4 _MISO
SPI
INT ⁸
CSB ⁷
MOSI_SDA ⁶
SCK_SCL ⁵
100n
INT VDD
CSB
MOSI DVIO
SCK
100n
100n
1 _VDD
2
VSS
3 _DVIO
4 _MISO
I2C
8
INT
7
CSB
6
MOSI_SDA
SCK_SCL ⁵
INT
SDA
SCL
Figure 15 Recommended circuit diagrams for CMA3000-D0X
VTI Technologies Oy
www.vti.fi
Doc.Nr. 8281000.12
23/ 35
Rev. 0.12