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AS5055

Datasheet - Detailed Descr i p ti on

package indicates if the SPI registers should be reset as well. The soft reset resets the digital part (‘RES SPI’ is set to one) as well as the OTP

memory. A new OTP memory auto-load is initiated and the reset values stored in the OTP memory are loaded into the configuration registers.

The command following the SOFTWARE RESET command can be any of the commands specified in this chapter.

After the data package is sent, the soft reset is generated. The fuses of the OTP memory are loaded into the registers and a new conversion

cycle will be started. If the device is in sleep mode the oscillator will be started first.

Figure 8. SOFTWARE RESET Command

In order to invoke a software reset on the AS5055 the following bit pattern has to be sent.

Table 11. SOFTWARE RESET Command

Bit

MSB

14

13

12

11

10

9

8

7

6

5

4

3

2

1

LSB

011

11000

00000

00

PAR

SOFTWARE RESET command

PAR

Table 12. Data Package

Bit

MSB

14

13

12

11

10

9

8

7

6

5

4

3

2

1

LSB

Don’t care

RES SPI Don’t care PAR

Bit

Description

RES SPI

If set to one, SPI registers are reset as well

1

1. After a power on reset, the OTP will be read and hence OTP related

registers are changed independent on the RES SPI flag.

PAR

Parity bit (EVEN)

SOFTWARE

RESET

command

DATA

MOSI

MSB

LSB

MSB

LSB

Response-1

0x 0000

MISO

MSB

LSB

MSB

LSB

Transmission N

Transmission N +1

Next command

MSB

LSB

0x 0000

MSB

LSB

Transmission N +2