AS5045TR View Datasheet(PDF) - austriamicrosystems AG
Part Name
Description
MFG CO.
'AS5045TR' PDF : 34 Pages View PDF
AS5045
Data Sheet
Figure 13. OTP Register Analog Read
ProgEN
CSn
OutpEN
Analog Readback Data at PROG
Power-on-
Reset;
turn off
supply
Vref
Vprogrammed
Internal
PROG
lid CLK
tLoadProg
test bit
digital
PWM Mag
halfEN Comp
EN
PWM
Dis
Z0
Vunprogrammed
Z7
Z8
Z9 Z10 Z11 CCW
Prog changes to Output
1
16
CLKAread
va 12 Alignment Mode
ill The alignment mode simplifies centering the magnet over the center of the chip to gain maximum accuracy.
Alignment mode can be enabled with the falling edge of CSn while Prog = logic high (Figure 14). The Data bits
D11-D0 of the SSI change to a 12-bit displacement amplitude output. A high value indicates large X or Y
t displacement, but also higher absolute magnetic field strength. The magnet is properly aligned, when the difference
G s between highest and lowest value over one full turn is at a minimum.
Under normal conditions, a properly aligned magnet will result in a reading of less than 128 over a full turn.
A t The MagINCn and MagDECn indicators will be = 1 when the alignment mode reading is < 128. At the same time,
both hardware pins MagINCn (#1) and MagDECn (#2) will be pulled to VSS. A properly aligned magnet will therefore
s n produce a MagINCn = MagDECn = 1 signal throughout a full 360° turn of the magnet.
Stronger magnets or short gaps between magnet and IC may show values larger than 128. These magnets are still
e properly aligned as long as the difference between highest and lowest value over one full turn is at a minimum.
m t The alignment mode can be reset to normal operation by a power-on-reset (disconnect / re-connect power supply) or
by a falling edge on CSn with Prog = low.
a on Figure 14. Enabling the Alignment Mode
Figure 15. Exiting Alignment Mode
l c Prog
a CSn
AlignMode enable
Read-out
via SSI
nic 2µs 2µs
Tech min. min.
Prog
CSn
exit AlignMode
Read-out
via SSI
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Revision 1.7
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