AS5035-T Просмотр технического описания (PDF) - austriamicrosystems AG
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AS5035-T Datasheet PDF : 18 Pages
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AS5035 – 64 PPR INCREMENTAL MAGNETIC ROTARY ENCODER
7.1 OTP Programming Timing
OTP programming requires access to the factory settings
The specified programming voltage at pin Prog is 7.3 –
register of the AS5035. Improper or accidental modification
7.5V (see section 12.8). To compensate for the voltage
of the factory settings may render the chip unusable.
drop across the VPROG switching transistor, the applied
Therefore the Zero Position and CCW programming is
programming voltage may be set slightly higher (7.5 -
recommended only with austriamicrosystems proprietary
8.0V).
hardware and software.
7.1.1 CCW Bit Programming
Note: During the programming process, the transitions in
The absolute angular output value, by default, increases
the programming current may cause high voltage spikes
generated by the inductance of the connection cable. To
avoid these spikes and possible damage to the IC, the
lid connection wires, especially the signals Prog and VSS
must be kept as short as possible. The maximum wire
length between the VPROG switching transistor and pin Prog
a (see Figure 6) should not exceed 50mm (2 inches). To
suppress eventual voltage spikes, a 10nF ceramic
v capacitor should be connected close to pins Prog and VSS.
This capacitor is only required for programming, it is not
ill required for normal operation.
The clock timing tclk must be selected at a proper rate to
t ensure that the signal Prog is stable at the rising edge of
G CLK (see Figure 7). Additionally, the programming supply
s voltage should be buffered with a 10µF capacitor mounted
A t close to the switching transistor. This capacitor aids in
providing peak currents during programming.
with clockwise rotation of the magnet (top view). Setting
the CCW-bit (see Figure 7) allows for reversing the
indicated direction, e.g. when the magnet is placed
underneath the IC:
CCW = 0 – angular value increases clockwise;
CCW = 1 – angular value increases counterclockwise.
Note: Further information on the required hardware and
software for Zero Position programming of the AS5035 can
be found in the “AS5035” section of the
austriamicrosystems website:
http:www.austriamicrosystems.com
(ÆRotary EncodersÆAS5035)
Technicaaml sconten Figure 7: Programming access – write data (first section of Figure 8)
Revision 1.5
Figure 8: Complete programming sequence
www.austriamicrosystems.com
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