ADXL180
Rev. 0 | Page 24 of 56
STATE VECTOR CODING
Table 18. SVD Data Bit Options
SVD Definition
0
State vector is enabled (default).
1
State vector is disabled, a reduced data range is used.
The 3-bit state vector field contains a code that defines the
meaning of the data contained in the 8- or 10-bit data field.
These definitions are listed in Table 19. When selected, the 3-bit
state vector is appended to the 8- or 10-bit data field and
transmitted as part of the data frame.
STATE VECTOR DESCRIPTIONS
Table 19. State Vector Table
SV2 SV1 SV0 State
Phase
Data In Frame
Description
0 0 0 Normal
operation
5 Sensor
data
This is the running state of the ADXL180. During this state,
an analog-to-digital conversion is performed, and the
resulting sensor data is transmitted every 228 μs in asyn-
chronous mode or every 250 μs in synchronous mode.
0 0 1 Device
data 2
Serial number/manufacturer
ID/range/user and configuration
register data
The data field contains serial number and/or configura-
tion data. See the ADXL180 State Machine section for
the device data transmission specifics for each MD1 to
MD0 selection.
0 1 0 Self
Test
0 3
Sensor data with the self-test
signal unasserted
The ADXL180 is in sensor self-test mode. The internal
sensor self-test signal is unasserted.
0 1 1 Self
Test
1 3
Sensor data with the self-test
signal asserted
The ADXL180 is in sensor self-test mode. The internal
sensor self-test signal is asserted.
1 0 0 Auto-zero
initialization
4 Sensor
data
The ADXL180 is in Phase 4. The auto-zero function is
running in the fast initialization mode.
1 0 1 OTP memory
data
NA
OTP memory data
(configuration mode data)
This state vector indicates that the data sent is from the
OTP memory of the ADXL180. This data type is only
sent when the device is in configuration mode.
1 1 0 Status/error NA Status/error
This state is set when an internal error is detected by
the ADXL180. The data field contains the error type. See
the Error Detection section for details.
1 1 1 Reserved NA Reserved
1
NA is not applicable.
