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A1332KLETR-T Datasheet(PDF) 10 Page - Allegro MicroSystems |
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A1332KLETR-T Datasheet(HTML) 10 Page - Allegro MicroSystems |
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10 / 20 page  Precision Hall Effect Angle Sensor IC with I2C Interface A1332 9 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com Programming Modes The EEPROM can be written through the primary serial interface to enter process coefficients and select options. Certain operating commands also are available by writing directly to SRAM. The EEPROM and SRAM provide parallel data structures for operat- ing parameters. The SRAM provides a rapid test and measure- ment environment for application development and bench testing. The EEPROM provides persistent storage at end of line for final parameters. At initialization, the EEPROM contents are read into the corresponding SRAM. The SRAM can be overwritten during operation (although it is not recommended). the EEPROM is permanently locked by setting the lock EEPROM [LE] bit in the EEPROM. The A1332 is programmed through the primary serial interface, an I2C interface receiving pulses through the SDA and SCL pins, with additional power provided by pulses on the VCC pin to set the EEPROM bit fields. VCC (V) 4.4 3.8 SDA Pin State t 3.7 VCC Low Flag Threshold, VCCLOW(TH) POR POR High Impedance Accurate Angle Output High Impedance Error Flag Set Error Flag Set Angle output accuracy reduced Angle output accuracy reduced Figure 3: Relationship of VCC and SDA output |
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