AS5050
Datasheet - Detailed Description
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 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
T
COM
MSB
LSB
MSB
LSB
MSB
LSB
SOFTWARE
RESET
command
MOSI
MISO
DATA
Next command
Response-1
0x 0000
0x 0000
MSB
LSB
MSB
LSB
MSB
LSB
Transmission N
Transmission N +1
Transmission N +2
In order to invoke a software reset on the AS5050 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
PAR
PAR
0
1
1
1
1
0
0
0
0
0
0
0
0
0
0
SOFTWARE RESET command
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
If set to one, SPI registers are reset as well1
Parity bit (EVEN)
RES SPI
PAR
1. After a power on reset, the OTP will be read and hence OTP related
registers are changed independent on the RES SPI flag.
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