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A1337 Datasheet(PDF) 24 Page - Allegro MicroSystems

Part # A1337
Description  Precision, Hall-Effect Angle Sensor IC with SPI, and SENT or PWM Outputs
PDF  37 Pages
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A1337 Datasheet(HTML) 24 Page - Allegro MicroSystems

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Precision, Hall-Effect Angle Sensor IC
with SPI, and SENT or PWM Outputs
A1337
24
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
ANG (Angle Output) Register
Address: 0x00
Address
0x00
Bit
12
11
10
9
8
7
6
5
4
3
2
1
0
Name
ANGLE_OUTPUT
–
R/W
R
R
R
R
R
R
R
R
R
R
R
R
R
Value
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
Stores data on current angle reading.
ANGLE_OUTPUT [12:1] Current Angle
Most recent angle reading. Value is unsigned, stored in bits 12:1 (bit 0
defaults to 0). As the target turns, the angle value increases or decreases
according to the rotational polarity setting in EEPROM (CUST_CFG2
register, POL bit).
Bit
Value
Description
12:1
0/1
Current angle reading.
TRN (Turns Count) Register
Address: 0x02
Address
0x02
Bit
12
11
10
9
8
7
6
5
4
3
2
1
0
Name
–
TURNS_COUNT
R/W
–
R
R
R
R
R
R
R
R
R
R
R
R
Value
X
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
Stores data on cumulative target full turns count.
TURNS_COUNT [11:0] Cumulative Turns Count
Most recent net accumulated turns count. A turn is counted at each crossing of: the
zero-angle and 180 degree points, or the zero-angle and incremental 45 degree points.
As the target turns, the count value increases or decreases according to the rotational
polarity setting in EEPROM (CUST_CFG register, POL bit). Turns count threshold can
be set to either 45 degrees or 180 degrees, based on the setting of EEP 0x15, Bit 18
(TC1, 1 = 45 degrees, 0 = 180 degrees).
Bit
Value
Angle Value (Absolute Degrees)
Description
11:0
0/1
EEP 0x15,
Bit 18, (TC1) = 0
EEP 0x15,
Bit 18, (TC1) = 1
Two’s complement current turns count, for example:
Turns Count
Field Bits Value
0
0
0
0000 0000 0000
180
45
+1
0000 0000 0001
230400
57600
+1280
0101 0000 0000
–180
–45
–1
1111 1111 1111
–230400
–57600
–1280
1011 0000 0000



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