AS5261

Datasheet - Detailed Descr i p ti on

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8.2.1 Programming Parameters

The PWM output characteristic is programmable by OTP. Depending on the application, the output can be adjusted. The user can program the

following application specific parameters:

These parameters are input parameters. Using the available programming software and programmer these parameters are converted and finally

written into the AS5261 128 bit OTP memory.

8.2.2 Application Specific Angular Range Programming

The application range can be selected by programming T1 with a related T1Y and T2 with a related T2Y into the AS5261. The clamping levels

CLL and CLH can be programmed independent from the T1 and T2 position and both levels can be separately adjusted.

Figure 4. Programming of an Individual Application Range

Figure 4 shows a simple example of the selection of the range. The mechanical starting point T1 and the mechanical end point T2 are defining

the mechanical range. A sub range of the internal Cordic output range is used and mapped to the needed output characteristic. The PWM output

signal has 12 bit, hence the level T1Y and T2Y can be adjusted with this resolution. As a result of this level and the calculated slope the clamping

region low is defined. The break point BP defines the transition between CLL and CLH. In this example the BP is set to 0º. The BP is also the

end point of the clamping level high CLH. This range is defined by the level CLH and the calculated slope. Both clamping levels can be set

independently form each other. The minimum application range is 9.8º.

T1

Mechanical angle start point

T2

Mechanical angle end point

T1Y

% duty cycle level at the T1 position

T2Y

% duty cycle level at the T2 position

CLL

Clamping Level Low

CLH

Clamping Level High

BP

Break point (transition point 0 to 360º)

C1

Calibration Point 1

C2

Calibration Point 2

C1Y

Trim value for C1

C2Y

Trim value for C2