HAL880 datasheet(10/34 Pages) MICRONAS

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HAL880

DATA SHEET

Feb. 23, 2009; DSH000152_001EN

Micronas

Clamping Voltage

The output voltage range can be clamped in order to

detect failures like short circuits to VDD or GND or an

open circuit.

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

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

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!

D/A-Readout

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.

Note: The MSB and LSB are reversed compared with

all the other registers. Please reverse this

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