AS5047U-HTST datasheet(22/51 Pages) AMSCO

Part #	AS5047U-HTST

Description	14-Bit On-Axis Magnetic Rotary Position Sensor with Up to 14-Bit Binary Incremental Pulse Count

PDF	51 Pages

Scroll/Zoom	100%

Manufacturer	AMSCO [ams AG]

Direct Link	http://www.ams.com

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22 / 51 page

Page 22

ams Datasheet

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[v1-00] 2018-Oct-30

AS5047U − Detailed Description

Figure 30:

SPI Write

PAD Word

Any number of PAD [8*n-1:0] bits can precede the MOSI data.

The PAD word is used to allocate the data on MISO to the correct

device.

CRC Checksum

For secure and reliable data transmission, the 24-Bit and 32-Bit

frames have a CRC for verification of correct transmission. The

CRC is calculated out of the payload of SPI frames (e.g.: CRC is

calculated out of bit 23:8 from 24-bit command frame)

The calculation of the CRC is based on Irreducible polynomial

x^8+x^4+x^3+x^2+1 according to standard J1850.

The initialization CRC = 0xFF prevents that 0x000000 is a valid

SPI command. This command would clear all sticky error flags.

Write ADD[n]

DATA (x)

CSn

Write ADD[m]

DATA (ADD[n])

DATA (ADD[m])

DATA (x)

Comm and

Data to write into A DD[n]

Data content ADD[n]

Data content ADD[m]

New Data content

of ADD[n]

MOSI

MISO

DATA (y)

Data to write into A DD[m]

command

Comm and

DATA (y)

New Data content

of ADD[m]

AS5047U-HTST Datasheet(PDF) 22 Page - ams AG

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