HAR2425 datasheet(11/33 Pages) MICRONAS

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DATA SHEET

HAR 24xy

Micronas

July 14, 2015; DSH000170_001EN

GAINOFF

The GAINOFF register offers the possibility to read the

magnetic field information after the DAC GAIN and

OFFSET scaling.

This register has a length of 16 bit and it is two’s-com-

plement coded. Therefore the register value can vary

between

32768...32767.

DAC

The DAC register offers the possibility to read the mag-

netic field information at the end of the complete signal

path. The value of this register is then converted into

an analog output voltage.

The register has a length of 16 bit and it is two’s-com-

plement coded. Therefore the register value can vary

between

32768...32767.

MIC_ID1 and MIC_ID2

The two registers MIC_ID1 and MIC_ID2 are used by

Micronas to store production information like, wafer

number, die position on wafer, production lot, etc. Both

registers have a length of 16 bit each and are readout

only.

PWM Frequency

The PWM frequency is selectable by 2 bits, which are

part of the CUSTOMER SETUP register (bits 11:10).

The CUSTOMER SETUP register is described on the

following pages. The following four different frequen-

cies can be used:

DIAGNOSIS

The DIAGNOSIS register enables the customer to

identify certain failures detected by the sensor.

HAR 2425 performs certain self tests during power-up

of the sensor and also during normal operation. The

result of these self tests is stored in the DIAGNOSIS

Details on the sensor self tests can be found in

Section 3.3. on page 16.

PROG_DIAGNOSIS

The PROG_DIAGNOSIS register enables the cus-

tomer to identify errors occurring during programming

and writing of the EEPROM or NVRAM memory. The

customer must either check the status of this register

after each write or program command or alternatively

the second acknowledge. Please check the Program-

ming Guide for HAL 24xy.

The PROG_DIAGNOSIS register is a 16 bit register.

The following table shows the different bits indicating

certain errors possibilities.

Table 3–1: Selectable PWM frequencies

PWM_FREQ

Frequency

Resolution

Bit 11

Bit 10

2 kHz

11 bit

1 kHz

12 bit

500 Hz

12 bit

250 Hz

12 bit

Bit no.

Function

Description

15:6

None

Reserved

State Machine

(DSP) Self test

This bit is set to 1 in case that the

statemachine self test fails.

(continuously running)

EEPROM Self test

This bit is set to 1 in case that the

EEPROM self test fails.

(Performed during power-up only)

ROM Check

This bit is set to 1 in case that ROM

parity check fails.

(continuously running)

2AD converter

overflow

This bit is set to 1 in case the input

signal is too high, indicating a

problem with the magnetic range.

1:0

None

Reserved

Bit No. Function

Description

15:11

None

Reserved

Charge Pump

Error

This bit is set to 1 in case that

the internal programming

voltage was to low

Voltage Error

during Program/

Erase

This bit is set to 1 in case that

the internal supply voltage was

to low during program or erase

NVRAM Error

This bit is set to 1 in case that

the programming of the

NVRAM failed

7:0

Memory

Programming

For further information please

refer to the Programming

Guide for HAL 242x

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