IC-TW14 Datasheet, PDF (9/33 Pages) IC-Haus GmbH – IC-PMX Companion Chip

iC-TW14
iC-PMX Companion Chip
Rev A1, Page 9/33
the application. When this packet is ready (MRDY high),
the singleturn absolute sensor clocks the data out of
the iC-TW14’s multiturn SSI interface.
A serial port allows access to internal registers and diag-
nostics for system setup, calibration, and troubleshoot-
ing. Wiegand pulse voltage and angle, current ramp
duration, Wiegand sensor misalignment, and magnetic
field strength at the four iC-PMX singleturn Hall sensors
can all be measured to ensure proper operation.
The NPRE pin can be connected to a pushbutton to
allow one-button calibration of system multiturn origin
(zero) position. When NPRE is active the TW14 sets
SSI_OFF to the correct value so that the multiturn ab-
solute position output to the singleturn absolute sensor
(SSI_MT and SSI_ST) is zero.
A built-in temperature diode provides the die tempera-
ture of the iC-TW14 and a built-in bandgap reference
provides the value of the supply voltage for diagnostics
and testing.