HAL880
DATA SHEET
Clamping Voltage
D/A-Readout
The output voltage range can be clamped in order to
detect failures like short circuits to VDD or GND or an
open circuit.
The 14-bit D/A-READOUT register delivers the actual
digital value of the applied magnetic field after the sig-
nal processing. This register can be read out and is the
basis for the calibration procedure of the sensor in the
system environment.
The CLAMP-LOW register contains the parameter for
the lower limit. The lower clamping voltage is program-
mable between 0 V and VDD/2. For VDD = 5 V, the
register can be changed in steps of 9.77 mV.
Note: The MSB and LSB are reversed compared with
all the other registers. Please reverse this
register after readout.
The CLAMP-HIGH register contains the parameter for
the upper limit. The upper clamping voltage is pro-
grammable between 0 V and VDD. For VDD = 5 V, in
steps of 9.77 mV.
GP Register
This register can be used to store some information,
such as production date or customer serial number.
Micronas will store production lot number, wafer num-
ber, and x, y coordinates in three blocks of this regis-
ters. The total register contains of four blocks with a
length of 13 bit each. The customer can read out this
information and store it in his own production data
base for reference or he can change them and store
own production information.
Note: To enable programming of the GP register, bit 0
of the MODE register has to be set to 1. This
register is not a guarantee for traceability.
LOCKR
By setting the first bit of this 2-bit register, all registers
will be locked and the sensor will no longer respond to
any supply voltage modulation. This bit is active after
the first power-off and power-on sequence after setting
the LOCK bit.
Warning: This register cannot be reset!
10
Feb. 23, 2009; DSH000152_001EN
Micronas
MICRONAS [ MICRONAS ]
