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[v2-04] 2015-Oct-07

AS5410 − Detailed Description

Continuous Measurement

It is possible to continuously read data from the AS5410 even

if a new measurement is not yet finished. In this case, the last

measurement data will be read. As soon as a new measurement

is completed, it will be available at the SPI interface.

Write Mode and Readback

For additional safety and detection of communication errors,

the actual contents of a register may be read at the same time

as new data is written to this register.

In case of a Write command, the 16-bit Write address (with

A<15>=1) is sent to the MOSI pin. After 16 SCK cycles, data

following the address bits is written to the specified address via

MOSI in (see Figure 17) At the same time, the present data of

that register may be read from the MISO pin. Following the

16-bit of data (Data 1 in Figure 17), a new address may be

written to the AS5410. While the new address is written, the

address from the previous command is available at the MISO

output.

Checksum

To avoid reading errors, the IC calculates a Checksum at every

read cycle from the register content. The Checksum value is

built by an XOR operation of the previous Checksum value and

the read register content. The CRC is calculated every time a

By choosing how often the Checksum is read and rechecked by

the master it is possible to adjust the communication speed and

safety level.

The Checksum value is stored in register 0108h (see Register

Description).

AS5410 bảng dữ liệu(PDF) 16 Page - ams AG