as5045 austriamicrosystems, as5045 Datasheet - Page 5

• Manufacturer Part Number: as5045
• Description: 12-bit Programmable Magnetic Rotary Encoder
• Manufacturer: austriamicrosystems

AS5045 12-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER
4.1.2
The
movement and distance of the magnet in the Z-direction.
Signal indicators MagINCn and MagDECn are available both
as hardware pins (pins #1 and 2) and as status bits in the
In the default state, the status bits MagINC, MagDec
and pins MagINCn, MagDECn have the following function:
Table 4: Magnetic field strength variation indicator
When bit MagCompEn is programmed in the OTP, the function of status bits MagINC, MagDec
and pins MagINCn, MagDECn is changed to the following function:
Table 5: Magnetic field strength red-yellow-green indicator (OTP option)
Note: Pin 1 (MagINCn) and pin 2 (MagDECn) are active low via open drain output and require an external pull-up resistor. If
the magnetic field is in range, both outputs are turned off.
The two pins may also be combined with a single pull-up resistor. In this case, the signal is high when the magnetic field is
in range. It is low in all other cases (see Table 4 and Table 5).
Revision 1.2, 03-Oct-06
Mag
Mag
INC
INC
Status bits
AS5045
0
0
1
1
0
1
1
All other combinations
Z-axis Range Indication (Push Button Feature, Red/Yellow/Green Indicator)
Status bits
Mag
DEC
Mag
DEC
0
1
0
1
0
1
1
provides
Hardware pins
Mag
INCn
LIN
Off
Off
On
On
0
0
1
several
INCn
Mag
DECn
Hardware pins
n/a
Mag
Off
On
On
Off
On
Off
On
options
DECn
OTP: Mag CompEn = 0 (default)
Description
No distance change
Magnetic input field OK (in range, ~45…75mT)
Distance increase; pull-function. This state is dynamic and only active while the magnet is
moving away from the chip.
Distance decrease; push- function. This state is dynamic and only active while the magnet is
moving towards the chip.
Magnetic input field invalid – out of recommended range:
too large, too small (missing magnet)
Mag
n/a
Off
Off
On
of
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detecting
OTP: Mag CompEn = 1 (red-yellow-green programming option)
Description
No distance change
Magnetic input field OK ( GREEN range, ~45…75mT)
YELLOW range: magnetic field is ~ 25…45mT or ~75…135mT. The AS5045 may
still be operated in this range, but with slightly reduced accuracy.
RED range: magnetic field is ~<25mT or >~135mT. It is still possible to operate the
AS5045 in the red range, but not recommended.
Not available
serial data stream (see Figure 4). Additionally, an OTP
programming option is available with bit MagCompEn (see
Figure 9) that enables additional features:
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