as5055 austriamicrosystems, as5055 Datasheet - Page 13

• Manufacturer Part Number: as5055
• Description: Low Power 12 Bit Magnetic Rotary Encoder
• Manufacturer: austriamicrosystems

AS5055
Data Sheet – SPI Communication
10.5.4 SOFTWARE RESET Command
The SOFTWARE RESET command is implemented as WRITE command. The bit ‘RES SPI’ of the DATA 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 PPTRIM. A new PPTRIM auto-load is initiated and the reset values stored in the PPTRIM 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 PPTRIM 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.
Note:
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Bit Definition & Description
RES SPI
PAR
Bit
Bit
(1) After a power on reset the OTP will be read and hence otp-related registers are changed independent on the
MSB
MSB
RES SPI flag
0
14
14
1
If set to one, SPI registers are reset as well (1)
Parity bit (EVEN)
13
13
1
12
12
1
11
11
1
SOFTWARE RESET Command
SOFTWARE RESET command
10
10
0
Don’t care
9
9
0
Data Package
Revision 1.2
8
8
0
7
7
0
6
6
0
5
5
0
4
4
0
3
3
0
RES
SPI
2
2
0
Don’t
care
13 – 22
1
0
1
PAR
PAR
LSB
LSB
PAR