Automotive Grade, 3-D Linear Hall-Effect Sensor

ALS31313

13

Allegro MicroSystems, LLC

955 Perimeter Road

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

www.allegromicro.com

Reserved

Read Only

Read/Write Volatile

Read/Write EEPROM

Write 1 to Clear

Clear on Read

Table 3: EEPROM 0x03

Address

Bits

Default

Name

Description

0x03

31:25

0

Reserved

Reserved

24

0

Signed INT Enable

Controls if the interrupt threshold(s) are absolute or signed.

In absolute mode, an interrupt is triggered if the applied field crosses the

threshold in either the positive or negative direction. In signed mode, an

interrupt is only triggered if the applied field passes the threshold in a single

direction specified by the user.

0 = Absolute

1 = Signed

See Interrupt section.

23

0

INT Mode

Controls the behavior of INT.

0 = Threshold Mode. Compares the sensor’s most recent measurement to the

specified event conditions.

1 = Delta Mode. Used in combination with LPDCM. Compares the sensor’s

most recent measurement to the first measurement when the device entered

LPDCM and the specified event conditions.

See Interrupt section.

22

0

INT EEPROM Status

Non-volatile EEPROM storage to indicate an interrupt event has occurred.

See Interrupt section.

21

0

INT EEPROM Enable

If set, INT EEPROM Status will be automatically written when an interrupt

event occurs.

See Interrupt section.

20

0

Z INT Enable

INT enable for Z axis. See Interrupt section.

19

0

Y INT Enable

INT enable for Y axis. See Interrupt section.

18

0

X INT Enable

INT enable for X axis. See Interrupt section.

17:12

0

Z INT Threshold

INT threshold for Z axis. Affected by Signed INT Enable. See Interrupt section.

11:6

0

Y INT Threshold

INT threshold for Y axis. Affected by Signed INT Enable. See Interrupt section.

5:0

0

X INT Threshold

INT threshold for X axis. Affected by Signed INT Enable. See Interrupt section.

Table 4: EEPROM 0x0D, 0x0E and 0x0F

Address

Bits

Default

Name

Description

0x0D

25:0

0

Customer EEPROM

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

information. Does not affect device operation.

0x0E

25:0

0

Customer EEPROM

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

information. Does not affect device operation.

0x0F

25:0

0

Customer EEPROM

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

information. Does not affect device operation.