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AS5115

Datasheet - Detailed Descr i pti on

For programming of the OTP, an additional voltage has to be applied to the pin PROG. It has to be buffered by a fast 100nF capacitor (ceramic)

and a 10µF capacitor. The information to be programmed is set by command 25. The OTP bits 16 until 45 are used for AMS factory trimming and

cannot be overwritten.

After programming, the programmed OTP bits can be verified in two ways:

By Digital Verification: This is simply done by sending a READ OTP command (#15). The structure of this register is the same as for the OTP

PROG or OTP WRITE commands.

By Analog Verification: By switching into Extended Mode and sending an ANALOG OTP READ command (#9), pin PROG becomes an output,

sending an analog voltage with each clock representing a sequence of the bits in the OTP register (starting with D45). A voltage of <500mV

indicates a correctly programmed bit (“1”) while a voltage level between 2V and 3.5V indicates a correctly unprogrammed bit (“0”). Any voltage

level in between indicates incorrect programming.

Figure 10. Analog OTP Verification

Symbol

Parameter

Min

Max

Unit

Note

Supply Voltage

5

5.5

V

GND

Ground level

0

0

V

V_zapp

Programming Voltage

8

8.5

V

At pin PROG

T_zapp

Temperature

0

85

ºC

f_clk

CLK Frequency

100

kHz

At pin DCLK

VDD

VSS

Micro

Controller

AS5130

100n

VSS

+5V

VDD

CS

VDD

DCLK

DIO

PROG

VSS

I/O

Output

Output

V