Automotive Grade, 3-D Linear Hall-Effect Sensor

ALS31313

12

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

EEPROM

The following EEPROM addresses are customer accessible and may be read at any time, with or without entering the customer access

code. Customer Access mode must be enabled to write to any of these registers.

Reserved

Read Only

Read/Write Volatile

Read/Write EEPROM

Write 1 to Clear

Clear on Read

Table 2: EEPROM 0x02

Address

Bits

Default

Name

Description

0x02

31:24

0

Reserved

Reserved

23:21

0

BW Select

Used to control the sample rate of the device. Resolution can be traded for

faster samples.

0 = Slowest sample rate, highest resolution

7 = Fastest sample rate, lowest resolution

See Bandwidth Selection section.

20:19

See

Selection

Guide

Hall Mode

Controls the operation mode of the Hall plates.

0 = Single-Ended Hall Mode

1 = Differential Hall Mode

2 = Common Hall Mode

3 = Alternating Hall mode (switches between Differential and Common Hall

Modes for each conversion per enabled axis.

See Hall Modes section.

18

0

applications that require high data integrity.

0 = Disabled

1 = Enabled

See CRC section

17

0

Disable Slave ADC

Disable the external slave address pins. When set, the EEPROM setting in

section.

16:10

111

Slave Address

Used to set the slave address for the device when either Disable Slave ADC is

9

1

0 = 3 V compatible mode (Increases threshold for logic input high level)

1 = 1.8 V compatible mode

8

1

Channel Z Enable

Enables the Z channel. Disable for faster update rate if this axis is not needed.

7

1

Channel Y Enable

Enables the Y channel. Disable for faster update rate if this axis is not needed.

6

1

Channel X Enable

Enables the X channel. Disable for faster update rate if this axis is not needed.

5

0

INT Latch Enable

Enables volatile latching of the INT signal. When set, if an interrupt event

occurs, the INT status bit and INT output will both remain latched even after the

event goes away.

See Interrupt section.

4:0

0

Customer EEPROM

Customer non-volatile EEPROM. Can be used to store any customer

information. Does not affect device operation.