AS5410 datasheet(17/56 Pages) AMSCO

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ams Datasheet

Page 17

[v2-04] 2015-Oct-07

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AS5410 − Detailed Description

PWM Data Transmission

In addition to the SPI interface, the AS5410 offers a PWM output

that provides data transmission of the linearized output data

over a single wire. The base frequency of the PWM is the system

clock frequency, so one PWM digit always corresponds to

approx. 125ns. The PWM resolution is set by 3 bits

(PWMPreScale) which shift the 16 bit wide angle value by 0 to

7 digits.

The duty cycle of the PWM signal lies between 0% to 100%. In

case of an error, the duty cycle is 0%.

If register 0122h value increases the duty cycle decreases. If

Figure 18:

Figure 19:

Single Pin Data Transmission Connection Diagram

Access

Bit

Function

Default

Note

000Dh:

PWM

settings

R/W

D15-10

PWMLimitHi <5:0>

PWM Limit High,

Limits the PWM duty cycle to a

maximum value

D9-4

PWMLimitLo <5:0>

PWM Limit Low,

Limits the PWM duty cycle to a

minimum value

PWMEn

PWM Enable,

Enables the PWM output

D2-0

PWMPreScale <2:0>

PWM PreScale,

Sets PWM frequency and resolution

AS5410

µC

PWM

VDD

VSS

GND

VDD= 3.0 - 3.6V

100nF

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