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ATS344 Datasheet(PDF) 15 Page - Allegro MicroSystems

Part # ATS344
Description  High-Precision Linear Hall-Effect Sensor IC with Two-Wire Current-Mode PWM Output and an Integrated Rare-Earth Pellet Package
PDF  36 Pages
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

ATS344 Datasheet(HTML) 15 Page - Allegro MicroSystems

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High-Precision Linear Hall-Effect Sensor IC with Two-Wire
Current-Mode PWM Output and an Integrated Rare-Earth Pellet Package
ATS344
15
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Reading from EEPROM
A Read command with the register number is sent from the con-
troller to the ATS344. The device responds with a Read Acknowl-
edge frame. Output is automatically disabled after the Read com-
mand from the controller is received and output is enabled after a
Read Acknowledge command is sent.
C1
C0
C2
Input Data
1x 0
1x 1
0x 2
1x 3 = x3 + x + 1
Figure 9: CRC Calculation
Error Checking
The serial interface uses a cyclic redundancy check (CRC) for
data-bit error checking (synchronization bits are ignored during
the check). The CRC algorithm is based on the polynomial
g(x) = x3 + x + 1
and the calculation is represented graphically in Figure 9. The
trailing 3 bits of a message frame comprise the CRC token. The
CRC is initialized at 111.The trailing 3 bits of a message frame
comprise the CRC token.



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