NXP Semiconductors
FXPS7115D4
Digital absolute pressure sensor, 40 kPa to 115 kPa
7.5.5.4 SPI data output verification error
The device includes a function to verify the integrity of the data output to the MISO pin.
The function compares the data transmitted on the MISO pin to the data intended to be
transmitted. If any one bit does not match, a SPI MISO mismatch fault is detected and
the MISO_ERR flag in the DEVSTAT2 register is set.
If a valid sensor data request message is received during the SPI transfer with the MISO
mismatch failure, the request is ignored and the device responds with the error response
as described in Section 7.5.5.2 "Error responses" with the detailed status field set to
“SPI Error” as defined in Section 7.5.5.1 "Basic status field" during the subsequent SPI
message.
If a valid register write request message is received during the SPI transfer with the
MISO mismatch failure, the register write is completed as requested, but the device
responds with the error response as described in Section 7.5.5.2 "Error responses" with
the detailed status field set to “SPI Error” as defined in Section 7.5.5.1 "Basic status field"
during the subsequent SPI message.
If a valid register read request message is received during the SPI transfer with the MISO
mismatch failure, the register read is ignored and the device responds with the error
response as described in Section 7.5.5.2 "Error responses" with the detailed status field
set to “SPI Error” as defined in Section 7.5.5.1 "Basic status field", during the subsequent
SPI message.
SPI DATA OUT SHIFT REGISTER
DATA OUT BUFFER
MISO
D
Q
D
Q
R
MISO ERR
D
Q
SCLK
R
aaa-023748
Figure 21.ꢀSPI data output verification
7.5.6 SPI timing diagram
DSP Out
t
LAT
SS_B
t
t
t
t
SSN
LEAD
SCLKR
SCLKF
t
t
SSCLK
t
SCLKH
SCLK
SCLK
t
t
t
CLKSS
SCLKL
LAG
t
ACCESS
t
t
HOLD_OUT
t
VALID
DISABLE
MISO
t
HOLD_IN
t
SETUP
MOSI
aaa-023749
Figure 22.ꢀSPI timing diagram
FXPS7115D4
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© NXP B.V. 2019. All rights reserved.
Product data sheet
Rev. 3 — 5 December 2019
27 / 72
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