AS5410 datasheet(12/56 Pages) AMSCO

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[v2-04] 2015-Oct-07

AS5410 − Detailed Description

Power Modes

The AS5410 can be configured for two power modes:

• Continuous mode

• Single loop mode

Continuous Mode

In this mode, the AS5410 is always active. The chip continuously

updates the output registers. The completion of a new

measurement is signalled with pin READY.

Single Loop Mode

The AS5410 features an automatic power down mode. After

completion of a measurement, the chip automatically suspends

to standby. The SPI interface remains active. The control of this

mode is possible over register 000Eh (see Register Description).

A high on the Ready output indicates that a measurement is

completed. The AS5410 suspends to stand-by state after the

Ready output has been set.

Serial Interface (SPI)

The SPI interface provides data transfer between AS5410 and

the external microcontroller.

The minimum number of connections between microcontroller

and AS5410 is three:

MOSI: Master Out – Slave In; data transfer from

microcontroller to AS5410 (Write)

MISO: Master In – Slave Out; data transfer from AS5410

to microcontroller (Read)

SCK: Serial clock; Data is written and read with the rising

edge of SCK

Optionally, two further connections may be used:

CS_N: Chip select; this connection is mandatory when

multiple AS5410 devices are connected in parallel. In

electrically “noisy” environment it is recommended to

use the CS_N connection in order to maintain safe data

transfer.

For a single unit, this connection is optional as the data

transmission is synchronized automatically by the

number of SCK cycles. In this case it is recommended to

verify the synchronization by CRC, Data readback or

repeated reading and cross-checking of subsequent

measurements.

Ready: this output indicates when data is ready, it is

cleared by reading data from address 0100h or 0122h.

Detailed Description

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