IC-ML Datasheet, PDF (8/17 Pages) IC-Haus GmbH – HALL Position Sensor / Encoder

iC-ML
HALL Position Sensor / Encoder
Rev A3, Page 8/17
this vector rotates counterclockwise (mathematically
positive rotation), whereas if the tape is moved in pos-
itive x-direction (with respect to the chip), the vector
rotates clockwise (mathematically negative rotation).
Figure 7: Sensing of a pole wheel at the peripherie
using iC-ML
When the Vcos and Vsin signals are displayed as a
Lissajou figure, a rotating vector is defined. If the chip
is moved in positive x-direction with respect to the tape,
Figure 8: Signal outputs Vsin und Vcos
Programming the configuration
iC-ML has 28 modes of operation (see tables on the
following pages). After the device has been switched
on or "woken up" from standby mode by a low sig-
nal at pin NEN the levels at the configuration inputs
CFG1 to CFG3 are assessed. These three-level in-
puts can be connected to GND (low), left open (open)
or connected to VDD (high). For correct identification,
a setup time of at least tp(CFGx) = 4 µs must be main-
tained between programming the configuration and ac-
tivating the device. While the device is active changes
in signal at the configuration inputs are ignored.
If several iC-MLs are connected in series in chain op-
eration (see the description of functions on page 12)
it must be ensured that the NEN input of the devices
is switched to low during the various clock cycles and
that the programming default does thus not lie within
the active phase of the devices.
In standby all ports are switched to tristate, i.e. high
impedance. Only in chain operation modes port D is
active high so that the devices arranged further behind
can also be deactivated.
4V
VDD
NEN
CFGx
iC-ML active
td(VDD)on
tp(CFGx)
iC-ML active
tp(CFGx)
Figure 9: Programming the configuration