AS5046 AB austriamicrosystems, AS5046 AB Datasheet - Page 11

• Manufacturer Part Number: AS5046 AB
• Description: BOARD ADAPTER AS5046
• Manufacturer: austriamicrosystems

Specifications of AS5046 AB

• Sensor Type: Magnetic, Rotary Position
• Sensing Range: 360°
• Interface: Serial
• Voltage - Supply: 9V
• Embedded: No
• Utilized Ic / Part: AS5046
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption
• Sensitivity: -

AS5046 12-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER
Adapter PCB Operation Manual
9.2
Reading the Adapter PCB with the AS5046 Demoboard Software:
Further information on the AS5046 Demoboard Software is available in the AS5046 Demoboard Operation Manual
(see 7 Supporting Tools)
The AS5046 Adapter PCB can be read as “external encoder” in the same way as the internal encoder. Switching from
internal to external encoder can be done on the bottom left corner of the demoboard software screen: Encoder = onboard /
external. Additionally, when Encoder = external is selected, the buttons "Permanent write" and "Read" are enabled in the
"Zero Position" and "Incremental Mode" screens to allow OTP programming of the external encoder
Changing the Zero Position:
The programming options zero position and CCW operation can be modified at any time during normal operation.
Permanently programming these registers will set the default setting after power-up. Programmed settings can again be
modified during normal operation but will be reset to default when the power supply is disconnected.
OTP programming of the external AS5046 Encoder:
To program the external AS5046 encoder, a programming voltage of 7.5 to 8V DC (130mA) must be applied to pins Vzapp
and GND of the 3-pin connector at the right hand side of the demoboard. A 10µF buffer cap is recommended for this voltage
(see Figure 10).
Programming is not recommended with long wires between demoboard and external encoder, as the inductance of the cable
may generate high voltage spikes, that can cause wrong programming or even harm the IC. The maximum wire length
between the demoboard connector and the PROG pin of the external encoder should be 50mm (2”). Additionally, a 10nF
ceramic capacitor should be connected close to pin PROG and VSS.
.
An OTP (one time programming) cycle is automatically initiated, when button "Permanent write" is pressed.
The default (non-programmed) logic state is "0", consequently the programmed logic state is "1".
It is possible to write "1"s into the OTP register at subsequent programming cycles. However, a programmed "1" cannot be
cleared any more after programming.
Note that the chip will not be programmed, as long as no programming voltage is applied to Vzapp, although
the software will issue a warning message that the chip will be permanently programmed.
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