AS5050
Datasheet - Detailed Description
7.2.5 SPI Interface Commands
READ Command. For a single READ command two transmission sequences are necessary. The first package written to the AS5050 contains
the READ command (MSB high) and the address the chip has to access, the second package transmitted to the AS5050 device can be any
command the chip has to process next. The content of the desired register is available in the MISO register of the master device at the end of the
second transmission cycle.
Figure 5. READ Command
T COM
MSB
LSB
MSB
LSB
MOSI
MISO
READ
Next command
Response on
READ command
Response - 1
MSB
LSB
MSB
LSB
Transmission N
Transmission N +1
WRITE Command. A single WRITE command takes two transmission cycles. The WRITE command can be verified by sending a NOP
command after the WRITE command. The data will be sent back during NOP command.
Figure 6. WRITE Command
T
COM
MSB
LSB
MSB
LSB
MSB
LSB
MOSI
MISO
WRITE
command
DATA
Next command
Old register
content
New register
content
Response-1
MSB
LSB
MSB
LSB
MSB
LSB
Transmission N
Transmission N +1
Transmission N +2
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