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AS5263

Datasheet - Application In form atio n

8.2.1 Read / Write User Data

Data Content:

Data only for read:

CORDIC_OUT(13:0): 14-bit absolute angular position data

OCF (Offset Compensation Finished): logic high indicates the finished Offset Compensation Algorithm. As soon as this bit is set, the

AS5263 has completed the startup and the data is valid.

COF (Cordic Overflow): Logic high indicates an out of range error in the CORDIC part. When this bit is set, the CORDIC_OUT(13:0) data is

invalid. The absolute output maintains the last valid angular value. This alarm may be resolved by bringing the magnet within the X-Y-Z

tolerance limits.

AGC_VALUE (7:0): Magnetic field indication

Data for write and read:

DSP_RES resets the DSP part of the AS5263 the default value is 0. This is active low. The interface is not affected by this reset.

R1K_10K defines the threshold level for the OTP fuses. This bit can be changed for verification purpose. A verification of the programming

of the fuses is possible. The verification is mandatory after programming.

8.2.2 Programming Procedure

Note:

After programming the OTP fuses, a verification is mandatory. The procedure described below must be strictly followed to ensure

properly programmed OTP fuses.

Pull-up on OUT pin

VDD=5V

Wait startup time, device enters communication mode.

Write128 command: The trimming bits are written in the SFR memory.

Read128 command: The trimming bits are read back.

Compare read data to previous written data. If the data matches, then proceed further.

Upload command: The SFR memory is transferred into the OTP RAM.

Fuse command: The OTP RAM is written in the Poly Fuse cells.

Wait fuse time (6ms)

Write command (R1K_10K=1): Poly Fuse cells are transferred into the RAM cells compared with 10K

Ω resistor.

Download command: The OTP RAM is transferred into the SFR memory.

Read128 command: The fused bits are read back.

Compare read data to previous written and read data. If the data matches, then proceed further.

Write command (R1K_10K=0): Poly Fuse cells are transferred into the RAM cells compared with 1K

Ω resistor.

Download command: The OTP RAM is transferred into the SFR memory.

Read128 command: The fused bits are read back.

Compare read data to previous written and two times read data. If the data matches, then proceed further.

Pass2Func command or POR: Go to Functional mode.

Table 17. Read / Write Data

Area

Region

Address

Address

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

0x10

16

CORDIC_OUT[7:0]

0x11

17

0

0

CORDIC_OUT[13:8]

0x12

18

OCF

COF

0

0

0

0

DSP_RES R1K_10K

0x17

23

AGC_VALUE[7:0]

Read only

Read and Write