State Vector Coding; State Vector Descriptions - Analog Devices ADXL180 iMEMS Manual

ADXL180

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.

STATE VECTOR DESCRIPTIONS

Table 19. State Vector Table
SV2 SV1 SV0 State
0 0 0
Normal
operation
0 0 1 Device data
0 1 0 Self Test 0
0 1 1 Self Test 1
1 0 0 Auto-zero
initialization
1 0 1 OTP memory
data
1 1 0 Status/error
1 1 1 Reserved
1 NA is not applicable.
1
Phase Data In Frame
5 Sensor data
2
Serial number/manufacturer
ID/range/user and configuration
register data
3 Sensor data with the self-test
signal unasserted
3 Sensor data with the self-test
signal asserted
4 Sensor data
NA OTP memory data
(configuration mode data)
NA Status/error data (see Table 39)
NA Reserved
Rev. 0 | Page 24 of 56
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.
Description
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.
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.
The ADXL180 is in sensor self-test mode. The internal
sensor self-test signal is unasserted.
The ADXL180 is in sensor self-test mode. The internal
sensor self-test signal is asserted.
The ADXL180 is in Phase 4. The auto-zero function is
running in the fast initialization mode.
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.
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.