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AS5263
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
8.1.4
WRITE128
Figure 18 illustrates the format of the frame and the command.
Figure 18. Frame Organization of the WRITE128 Command
DATA1
DATA0
CMD
LSB
MSB
LSB
MSB
LSB
1
0
0
MSB
1
DATA3
DATA2
CMD
LSB
MSB
LSB
MSB
LSB
1
0
0
MSB
0
DATA5
DATA4
CMD
LSB
MSB
LSB
MSB
LSB
1
0
0
MSB
0
DATA7
DATA6
CMD
LSB
MSB
LSB
MSB
LSB
1
0
0
MSB
0
DATA9
DATA8
CMD
LSB
MSB
LSB
MSB
LSB
1
0
0
MSB
0
DATA11
DATA10
CMD
LSB
MSB
LSB
MSB
LSB
1
0
0
MSB
0
DATA13
DATA12
CMD
LSB
MSB
LSB
MSB
LSB
1
0
0
MSB
0
DATA15
DATA14
CMD
LSB
MSB
LSB
MSB
LSB
1
0
0
MSB
0
The command contains 8 frames. With this command, the AS5263 receives only frames. This command will transfer the data in the special
function registers (SFRs) of the device. The data is not permanent programmed using this command.
Table 16 describe the organization of the OTP data bits.
The access is performed with CMD field set to 0x9. The next 7 frames with CMD field set to 0x1. The 2 bytes of the first command will be written
at address 0 and 1 of the SFRs; the 2 bytes of the second command will be written at address 2 and 3; and so on, in order to cover all the 16
bytes of the 128 SFRs.
Note: It is important to always complete the command. All 8 frames are needed. In case of a wrong command or a communication error, a
power on reset must be performed. The device will be delivered with the programmed Mem_Lock_AMS OTP bit. This bit locks the
content of the factory settings. It is impossible to overwrite this particular region. The written information will be ignored.
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