A1454 Datasheet, PDF (13/15 Pages) Allegro MicroSystems – 3V Hall Effect Linear Sensor with I2C Output

A1454
3V Hall Effect Linear Sensor with I²C Output
EEPROM Customer Space
Register 0x02 (Bits 25:0) are available as customer EEPROM
space. This memory location is intended to be utilized by the user
for storing information, such as factory time stamps, lot numbers,
version numbers, and so forth. This registers is not shadowed,
and so must be written 4 bytes at a time, as described in the
Programming EEPROM section (second method). Also, as with
all the EEPROM registers, these registers can only be written to
1000 times.
Table 3: EEPROM Memory Map
ADR 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0x00
Auto ECC Bits
Factory Access Only
0x01
Auto ECC Bits
Factory Access Only
0x02
Auto ECC Bits
Customer ID
0x03
Auto ECC Bits
Test_Field_TBD
Cust_Slave_Address
0x04
Auto ECC Bits
Factory Locked
0x05
Auto ECC Bits
Factory Locked
0x06
Auto ECC Bits
Factory Locked
0x07
Auto ECC Bits
Factory Locked
Table 4: Volatile Register That Shadow EEPROM (registers are loaded from EEPROM on power-up)
ADR 31 30 29 28 27 26 25
24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0x0B
Auto ECC Bits
Test_Field_TBD
Cust_Slave_Address
0x0C
Auto ECC Bits
Factory Locked
0x0D
Auto ECC Bits
Factory Locked
0x0E
Auto ECC Bits
Factory Locked
0x0F
Auto ECC Bits
Factory Locked
Allegro MicroSystems, LLC
13
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com