as5311 austriamicrosystems, as5311 Datasheet - Page 9

• Manufacturer Part Number: as5311
• Description: High Resolution Magnetic Linear Encoder
• Manufacturer: austriamicrosystems

AS5311
Data Sheet
6.1 Incremental Outputs
Figure 6 shows the two-channel quadrature output of the AS5311. Output A leads output B when the magnet is
moving from right to left and output B leads output A when the magnet is moving from left to right
(see Figure 14).
Figure 6: Incremental outputs
6.1.1
After power-up, the incremental outputs can optionally be locked or unlocked, depending on the status of the
CSn pin:
CSn = low at power-up:
CSn = high or open at power-up:
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Increm en tal outputs
CSn has an internal pull-up resistor and must be externally pulled low (R
power-up, the incremental outputs A, B and Index will be high until the internal offset compensation is
finished.
This unique state may be used as an indicator for the external controller to shorten the waiting time at
power-up. Instead of waiting for the specified maximum power up-time (see 5.5), the controller can start
requesting data from the AS5311 as soon as the state (A=B=Index = high) is cleared.
In this mode, the incremental outputs (A, B, Index) will remain at logic high state, until CSn goes low or
a low pulse is applied at CSn. This mode allows intentional disabling of the incremental outputs until for
example the system microcontroller is ready to receive data.
Incremental Power-up Lock Option
In d e x
t
In cre m e n tal o u tp u ts va lid
Revision 1.00
H y st =
2 L S B
ext
≤ 5kΩ). If Csn is low at
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