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AS5040
Data Sheet
4 Pin Configuration
Figure 2: Pin Configuration SSOP16
MagINCn
MagDECn
A_LSB_U
B_Dir_V
NC
Index_W
VSS
Prog
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VDD5V
VDD3V3
NC
NC
PWM_LSB
CSn
CLK
DO
Pin Description
Table 2 shows the description of each pin of the standard SSOP16 package (Shrink Small Outline Package, 16 leads,
body size: 5.3mm x 6.2mmm; see Figure 2).
Pins 7, 15 and 16 are supply pins, pins 5, 13 and 14 are for internal use and must not be connected.
Pins 1 and 2 are the magnetic field change indicators, MagINCn and MagDECn (magnetic field strength increase or
decrease through variation of the distance between the magnet and the device). These outputs can be used to detect
the valid magnetic field range. Furthermore those indicators can also be used for contact-less push-button
functionality.
Pins 3, 4 and 6 are the incremental pulse output pins. The functionality of these pins can be configured through
programming the one-time programmable (OTP) register.
Table 1: Pin Assignment for the Different Incremental Output Modes
Output Mode
1.x: quadrature
2.x:step/direction
3.x: commutation
Pin 3
A
LSB
U
Pin 4
B
Direction
V
Pin 6
Index
Index
W
Pin 12
PWM
PWM
LSB
Mode 1.x: Quadrature A/B Output
Represents the default quadrature A/B signal mode.
Mode 2.x: Step / Direction Output
Configures pin 3 to deliver up to 512 pulses (up to 1024 state changes) per revolution. It is equivalent to the LSB
(least significant bit) of the absolute position value. Pin 4 provides the information of the rotational direction.
Both modes (mode 1.x and mode 2.x) provide an index signal (1 pulse/revolution) with an adjustable width of one LSB
or three LSB’s.
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