austriamicrosystems AS5145A Operation Manual - Page 3

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3.4

Encoder selection switch

The switch SW1 selects the encoder which communicates with the microcontroller through the SSI bus:
1.
Right position (default):
2.
Left Position:
The signals of the synchronous serial interface (DO, CLK, CSn, PROG) and the power supply (3.3V,
GND) of an external device can be connected directly to J6. In this configuration, the data of the serial
interface are displayed on the GUI or the LCD.
In standalone mode, regardless to the demoboard type (AS5045, AS5145A/B), AS5045 and AS5145A/B
•
can be attached to J6 and evaluated. See figure 3.
If the GUI is used for operation, additional devices AS5040, AS5140, AS5043 and AS5143 can be
•
connected to J6 and evaluated. In that case, the correct encoder must be selected instead of "Autoselect" in
the Device list of the PC software, see chapter 4.2 figure 4.
Revision 1.3, 22-Jul-2009
Onboard AS5045/AS5145A/B
External AS5045/AS5145A/B connected on J6
Demoboard switched to external
encoder mode
Figure 3: external AS5045/AS5145A/B connection to the demoboard
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