CMA3000-D0X VTI Hamlin, CMA3000-D0X Datasheet - Page 14

• Manufacturer Part Number: CMA3000-D0X
• Description: Cma3000-d0x Series 3-axis Accelerometer
• Manufacturer: VTI Hamlin

VTI Technologies Oy
www.vti.fi
Address: 05h
Register name: INT_STATUS, Interrupt status register
Note: Contents of INT_STATUS [2:0] is set to '000' always after reading of this register.
Address: 06h
Register name: DOUTX, X-channel output register
Address: 07h
Register name: DOUTY, Y-channel output register
Address: 08h
Register name: DOUTZ, Z-channel output register
The bit level description for acceleration data from DOUTX ... DOUTZ registers is presented in
Table 4 below. The acceleration data is presented in 2's complement format. At 0 g acceleration
the output is ideally 0h.
Table 4. Bit level description in [mg] for acceleration registers of CMA3000-D01.
s = sign bit
Range
Bits
Bits
Bits
Bits
2g
2g
8g
8g
7:3
1:0
7:0
7:0
7:0
2
G_RANGE
Mode
Mode
Mode
Mode
R
R
R
R
R
1
1
0
0
Value
Value
Value
Value
Initial
Initial
Initial
Initial
0h
0h
0h
0h
0h
0
400 Hz, 100 Hz
400 Hz, 100 Hz
Output sample
Doc.Nr. 8281000.12
40 Hz, 10 Hz
40 Hz, 10 Hz
rate
DOUTX
DOUTY
DOUTZ
FFDET
MDET
Name
Name
Name
Name
B7
s 1142 571
s 4571 2286 1142 571
s 4571 2286 1142 571
s 4571 2286 1142 571
Description
Reserved
1 – Free fall detected (i.e. 0 g acceleration)
0 – Free fall not detected
00 – No motion detected
01 – Trigger on X-axis
10 – Trigger on Y-axis
11 – Trigger on Z-axis
Description
See SPI data frame description for more info.
Description
See SPI data frame description for more info.
Description
See SPI data frame description for more info.
B6
B5
286
B4
143
B3
286
286
286
B2
71
143 1/14 = 71 mg
143 1/14 = 71 mg
143 1/14 = 71 mg
B1
36
CMA3000-D0X Series
1/56 = 18 mg
B0
Rev. 0.12
14/ 35