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AS5263
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
8 Application Information
The benefits of AS5263 are as follows:
Unique fully differential patented solution
Best protection for automotive applications
Easy to program
Flexible interface selection PWM, analog output
Ideal for applications in harsh environments due to contactless position sensing
Robust system, tolerant to magnet misalignment, airgap variations, temperature variations and external magnetic fields
No calibration required because of inherent accuracy
High driving capability of analog output (including diagnostics)
8.1 Programming the AS5263
The AS5263 programming is a one-time-programming (OTP) method, based on polysilicon fuses. The advantage of this method is that no
additional programming voltage is needed. The internal LDO provides the current for programming.
The OTP consists of 128 bits, wherein several bits are available for user programming. In addition, factory settings are stored in the OTP
memory. Both regions are independently lockable by built-in lock bits.
A single OTP cell can be programmed only once. By default, each cell is “0”; a programmed cell will contain a “1”. While it is not possible to reset
a programmed bit from “1” to “0”, multiple OTP writes are possible, as long as only unprogrammed “0”-bits are programmed to “1”.
Independent of the OTP programming, it is possible to overwrite the OTP register temporarily with an OTP write command. This is possible only
if the user lock bit is not programmed.
Due to the programming over the output pin, the device will initially start in the communication mode. In this mode, the digital angle value can be
read with a specific protocol format. It is a bidirectional communication possible. Parameters can be written into the device. A programming of the
device is triggered by a specific command. With another command (pass2funcion), the device can be switched into operation mode (analog or
PWM output). In case of a programmed user lock bit, the AS5263 automatically starts up in the functional operation mode. No communication of
the specific protocol is possible after this.
8.1.1
Hardware Setup
The pin OUT and the supply connection are required for OTP memory access. Without the programmed Mem_Lock_USER OTP bit, the device
will start up in the communication mode and will remain into an IDLE operation mode. The pull up resistor R Communication is required during
startup. Figure 1 shows the configuration of an AS5263.
Figure 11. Programming Schematic of the AS5263
SENSOR PCB
1uF
VDD_X
VDD_X
VDD5_X
AS5263
VDD
Programmer
R Communication
2.2uF
(low ESR)
2.2uF
(low ESR)
0.3 ohm
VDD3_X
OUT_X
KDOWN_X
DIO
GNDA_X GNDD_X GNDP_X
GND
GND
www.austriamicrosystems.com/AS5263
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