AS5055A Datasheet, PDF (15/31 Pages) ams AG – Low Power 12-Bit Magnetic Position Sensor

AS5055A − SPI Interface
Figure 16:
SPI Read Data Frame
SPI Read Data Frame
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
0
Data 15:2
EF PAR
Bit
15:2
1
0
Figure 17:
SPI Read
Name
Data
EF
PAR
Description
14 bit read data
0 = no command frame error occurred, 1 = error occurred
Parity bit (even) calculated on the upper 15 bits
The data is sent from the AS5055A to the microcontroller on the
MISO output. The parity bit PAR is calculated for the upper 15
bits. If an error is detected in the previous SPI command frame,
the EF bit is set. The addressed register is sampled on the rising
edge of CSn and the data is transmitted on MISO with the next
read command, as shown in Figure 17.
CSn
MOSI
MISO
Command
Read ADD[n]
Command
Read ADD[k]
Command
Read ADD[p]
Command
Read ADD[m]
Data
Data ADD[n]
Data
Data ADD[k]
Data
Data ADD[p]
ams Datasheet
[v2-03] 2014-Jul-31
Page 15
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