CMA3000-D0X Series
Address: 02h
Register name: CTRL, Control register
Initial
Value
0
Bits
7
Mode
RW
Name
Description
G_RANGE
0 – 8g measurement range is selected
1 – 2g measurement range is selected
6
5
RW
RW
0
0
INT_LEVEL 0 – INT is active when INT pin is set to logic high
1 – INT is active when INT pin is set to logic low
MDET_EXIT 0 – Device goes to measurement mode after motion
is detected (400Hz ODR)
1 – Device remains in motion detection mode after
motion is detected.
4
RW
RW
0
0
I2C_DIS
0 – I2C interface enabled
1 – I2C interface disabled.
3:1
MODE[2:0]
000 – Power down mode, default mode.
001 – Measurement mode, 100 Hz ODR.
010 – Measurement mode, 400 Hz ODR.
011 – Measurement mode, 40 Hz ODR.
100 – Motion detection mode, 10 Hz ODR.
101 – Free fall detection mode, 100 Hz ODR.
110 – Free fall detection mode, 400 Hz ODR.
111 – Power down mode
0
RW
0
INT_DIS
0 – Interrupts enabled
•
•
•
Measurement mode: data ready
Motion detection mode: motion detected
Free fall detection mode: free fall detected
1 – Interrupts disabled
Note that after changing MODE bits it may take some time to recover the target operating state.
ODR = Output Data Rate.
Address: 03h
Register name: STATUS, Status register
Initial
Value
0h
Bits
Mode
R
Name
Description
Reserved
7:4
3
0
PORST
1 means Power-on-Reset state. Reading the register
sets always bit to 0.
Reserved
2:1
0
0h
0
R
PERR
0 – No EEPROM Parity Error
1 – EEPROM Parity Error
Address: 04h
Register name: RSTR, Reset register
Initial
Value
0h
Bits
7:0
Mode
RW
Name
RSTR
Description
Writing 02h, 0Ah, 04h in this order resets ASIC.
Other sequences reserved.
VTI Technologies Oy
www.vti.fi
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Rev. 0.12
Doc.Nr. 8281000.12
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