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[v1-01] 2016-Apr-11

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AS5170 − Register Description

Output Linear Transfer Function

A linear transfer function controls the state of the output in

response to the absolute orientation of the external magnet.

The parameters which control this function are shown in

Figure 24.

Figure 23:

Transfer Function Control Parameters

As shown in the Figure 24, the parameters T1, T2, OT1, and OT2

define the input-to-output linear transfer function. The

dedicated programmer for the AS5170 uses the parameters

from Figure 23 to generate the corresponding settings CLMPL,

CLMPHH, PPOFFSET, PPGAIN and BP (see Figure 24).

The clamping level parameters CLMPL and CLMPH define the

absolute minimum and maximum level of the output. Both

clamping levels can be set with the 9 LSBs out of the 12-bit

output resolution. This means that the maximum value for

CLMPL is one eighth, while CLMPH minimum value is

seven-eighths of the output diagnostic. CLMPL and CLMPH

must always be set outside of the lower and upper diagnostic

failure band defined by the output broken wire voltage (see

Figure 24: BGPD and BVPU).

Symbol

Parameter

Resolution [bit]

Mechanical angle starting point

Mechanical angle stop point

OT1

Output at the starting point (T1)

OT2

Output at the stop point (T2)

CLMPL

Clamping level low

CLMPH

Clamping level high

Breakpoint

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