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FXLS93421 Datasheet(PDF) 209 Page - NXP Semiconductors

Part # FXLS93421
Description  Dual channel inertial sensor
PDF  254 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

FXLS93421 Datasheet(HTML) 209 Page - NXP Semiconductors

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NXP Semiconductors
FXLS9xxxx
Dual channel inertial sensor
Bits[31:28]
Bits[27:24]
Bits[23:16]
Bits[15:8]
Bits[7:4]
Bits[3:0]
Polynomial
Seed
Command
0x0
Register address
Register data
0x0
4-bit CRC
x4 + 1
1010
0x8
0x0
22
C1
0x0
0xF
x4 + 1
1010
0x4
0x0
1F
C1
0x0
0xD
x4 + 1
1010
0xC
0x0
22
00
0x0
0x6
x4 + 1
1010
0x6
0x0
1F
C1
0x0
0xF
x4 + 1
1010
0x4
0x0
FF
5A
0x0
0x1
x4 + 1
1010
0xC
0x0
3E
00
0x0
0xB
x4 + 1
1010
0x6
0x0
FF
5A
0x0
0x3
Table 326. SPI 4-bit CRC calculation examples
14.4.3 Selectable 3-bit CRC
The user can select a 3-bit CRC instead of the default 8-bit CRC for the SPI by
programming the SPI_CFG register as described in Section 11.2.20.
14.4.3.1 SPI command format with 3-bit CRC
MSB
LSB
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 = 0x0
Register Address
Register Data
Fixed Bits: Must = 0x00
3-bit CRC
C[3:0]
0
0
0
0
RA[7:1]
RA[0]
RD[7:0]
0
0
0
0
0
CRC[2:0]
Sensor Data Command
Command
Fixed Bits: Must = 0x00000
Fixed Bits: Must = 0x00
3-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
0
0
0
0
0
CRC[2:0]
Table 327. SPI command format with 3-bit CRC
14.4.3.2 SPI response format with 3-bit CRC
MSB
LSB
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
Response to Register Request
Command
Basic
Status
Unused
Data
= 0x0
Register Data: Contents
of RA[7:1] High Byte
Register Data: Contents
of RA[7:1] Low Byte
Unused Data = 0x00
3-bit CRC
C[0] C[3] C[2] C[1] ST[1:0]
0
0
RD[15:8]
RD[7:0]
0
0
0
0
0
CRC[2:0]
Response to Sensor Data Request
Command
Basic
Status
Sensor Data
Detail
Status
KAC
1
3-bit CRC
C[0] C[3] C[2] C[1] ST[1:0]
SD[11:0]
Optional SD
resolution
SF[1:0]
KAC[3:0]
1
CRC[2:0]
Error Response to Register Request
Command
Basic
Status
Unused
Data
= 0x0
Register Data: Contents
of RA[7:1] High Byte
Register Data: Contents
of RA[7:1] Low Byte
Unused Data = 0x00
3-bit CRC
0
0
0
0
1
1
0
0
RD[15:8]
RD[7:0]
0
0
0
0
0
CRC[2:0]
Error Response to Sensor Data Request With Sensor Data
Command
Basic
Status
Sensor Data
Detail
Status
KAC
1
3-bit CRC
C[0] C[3] C[2] C[1]
1
1
SD[11:0]
Optional SD
resolution
SF[1:0]
KAC[3:0]
1
CRC[2:0]
Table 328. SPI response format with 3-bit CRC
FXLS9xxxx
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2021. All rights reserved.
Product data sheet
Rev. 6 — 8 February 2021
209 / 254



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