KMA200 datasheet(21/32 Pages) NXP

21 / 32 page

KMA200_7

Product data sheet

Rev. 07 — 18 July 2008

21 of 32

NXP Semiconductors

KMA200

Programmable angle sensor

12.5 Hysteresis

The hysteresis error is deﬁned as the maximum difference between angle values given by

the device output when performing a positive (clockwise) rotation and negative rotation

(counter clockwise) over an angle range of 180

°.

The hysteresis error is deﬁned as follows:

∆ϕ

hys = |ϕmeas CW(ϕref) −ϕmeas CCW(ϕref)|

∆ϕ

hys: hysteresis

meas: CW measured angle for clockwise rotation

meas: CCW measured angle for counter clockwise rotation

13. Programming

The KMA200 comprises two major modes of operation. These modes are:

13.1 Normal operation mode

This is the default mode. The KMA200 starts in this mode without the need of writing to

the serial interface. In this mode a continuous conversion of the input signals into the

corresponding angles takes place. This mode is conﬁgured with the on-chip EEPROM.

Once in normal operation mode, the KMA200 can be reactivated for command mode only

by a new power-on reset.

Fig 11. Hysteresis

006aaa306

180

ϕmeas

(

°)

ϕref (°)

∆ϕhys

KMA200 Folha de dados(PDF) 21 Page - NXP Semiconductors