NXP Semiconductors
FXPS7115D4
Digital absolute pressure sensor, 40 kPa to 115 kPa
SCLK
SS_B
MOSI
phase one: command
phase two response
phase one: response-previous command
MISO
SCLK
SS_B
MOSI
T1
T2
R1
T3
R2
R3
MISO
aaa-023747
Figure 20.ꢀStandard 32 Bit SPI protocol timing diagram
7.5.1 SPI command format
Table 9.ꢀSPI command format
MSB: bit 31; LSB: bit 0
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
16
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Register access command
Command
Fixed bits:
must = 0h
Register address
Register data
8-bit CRC
C[3:0]
0
0
0
0
0
0
RA[7:1]
RA[0]
Sensor data command
Fixed bits: must = 0 0000h
RD[7:0]
CRC[7:0]
Command
8-bit CRC
C[3:0]
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
CRC[7:0]
FXPS7115D4
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© NXP B.V. 2019. All rights reserved.
Product data sheet
Rev. 3 — 5 December 2019
19 / 72
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