NXP Semiconductors
FXPS7115D4
Digital absolute pressure sensor, 40 kPa to 115 kPa
7.5.3.2.2 Register write response message format
Table 18.ꢀRegister write response message 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
Register access command
Register data: contents Register data: contents
9
8
7
6
5
4
3
2
1
0
Command
Basic
Unused
Data
0h
8-bit CRC
C[0], [3:1]
Status
of RA[7:1] high byte
of RA[7:1] low byte
0
1
0
0
ST[1:0]
0
0
RD[15:8]
RD[7:0]
CRC[7:0]
Table 19.ꢀRegister write response message bit field descriptions
Bit field
C[0], [3:1]
ST[1:0]
Definition
Register Read Command = '0100'
Status
RD[15:8]
RD[7:0]
The contents of the register addressed by RA[7:1] high byte (RA[0] = 1)
The contents of the register addressed by RA[7:1] low byte (RA[0] = 0)
8-bit CRC
CRC[7:0]
7.5.3.3 Sensor data request commands
The device supports standard sensor data request commands. The sensor data request
command format is described in Section 7.5.3.3.1 "Sensor data request command
message format". The response to a sensor data request is shown in Section 7.5.3.3.2
"Sensor data request response message format". The response is transmitted on the
next SPI message subject to the error handling conditions specified in Section 7.5.5
"Exception handling". The sensor data included in the response is the sensor data at the
falling edge of SS_B for the sensor data request response.
7.5.3.3.1 Sensor data request command message format
Table 20.ꢀSensor data request command message 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
Command
Fixed bits: must = 0 0000h
8-bit CRC
C[3:0]
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
CRC[7:0]
Table 21.ꢀSensor data request command message bit field descriptions
Bit field
Definition
C[0]
Sensor data request command = '1'
Source identification code for the requested sensor data
8-bit CRC
C[3:1] = SOURCEID[2:0]
CRC[7:0]
FXPS7115D4
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© NXP B.V. 2019. All rights reserved.
Product data sheet
Rev. 3 — 5 December 2019
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