NXP Semiconductors
FXPS7115D4
Digital absolute pressure sensor, 40 kPa to 115 kPa
Write ST_CTRL = 0x1
Enable PABS
Common Mode Self Test
Delay < t
from Self Test
ST_INIT
Activation
Write ST_CTRL = 0x0
Disable PABS
Common Mode Self Test
Delay > t
from Self Test
ST_INIT
Activation
Read the DSP_STAT Register
yes
ST_ACTIVE Set?
no
User Determined Options:
1) Repeat Self-Test xx times
2) Set error status and continue
3) Set error status and ignore sensor data
yes
ST_ERROR Set?
no
END
aaa-023443
Figure 4.ꢀUser-controlled PABS common mode self-test flowchart
7.3.2.2 Startup digital self-test verification
Four unique fixed values can be forced at the output of the sinc filter by writing to the
ST_CTRL bits as shown in Table 4. The digital self-test values result in a constant value
at the output of the signal chain. After a specified time period, the SNS_DATAx register
value can be verified against the specified values in the table below. The values listed
below are for the PABS signal. When any of these self-test functions are selected, the
ST_ACTIVE bit is set. These signals can only be selected when the ENDINIT bit is not
set.
FXPS7115D4
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© NXP B.V. 2019. All rights reserved.
Product data sheet
Rev. 3 — 5 December 2019
7 / 72
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