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AS5134 Datasheet(PDF) 16 Page - ams AG |
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AS5134 Datasheet(HTML) 16 Page - ams AG |
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16 / 29 page  www.austriamicrosystems.com Revision 1.6 16 - 29 AS5134 Data Sheet - D e ta i l e d D e s c r i p t i o n AS5134 Programming The AS5134 offers the following user programmable options: Zero Position Programming This programming option allows the user to program any rotation angle of the magnet as the new zero position. This useful feature simplifies the assembly process as the magnet does not need to be mechanically adjusted to the electrical zero position. It can be assembled in any rotation angle and later matched to the mechanical zero position by zero position programming. The 8,5-bit user programmable zero position can be applied both temporarily (command WRITE OTP, #31) or permanently (command PROG OTP, #25). Magnetic Field Optimization This programming option allows the user to match the vertical distance of the magnet with the optimum magnetic field range of the AS5134 by setting the sensitivity level. The 2-bit user programmable sensitivity setting can be applied both temporarily (command WRITE OTP, #31) or permanently (command PROG OTP, #25). Low/Mid Power Mode Mid Power Mode is a power saving mode with fast start-up. In Mid Power Mode, all internal digital registers are frozen and the power consumption is reduced to max. 1,5 mA. Start-up from this mode to normal operation can be accomplished within 250µs. This mode is recommended for applications, where mid power, but fast start-up and short reading cycle intervals are required. OTP Programming Connection Programming of the AS5134 OTP memory does not require a dedicated programming hardware. The programming can be simply accomplished over the serial 3-wire interface(see Figure 12) or the optional 2-wire interface(see Figure 5). For permanent programming (command PROG OTP, #25), a constant DC voltage of 8.0 – 8.5V (=100mA) must be connected to pin 1 (PROG). For temporary OTP write (“soft write”; command WRITE OTP, #31), the programming voltage is not required. Figure 12. OTP Programming Connection Programming Verification After programming, the programmed OTP bits may 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 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. A voltage of <500mV indicates a correctly programmed bit (“1”) while a voltage level between 2.2V and 3.5V indicates a correctly unprogrammed bit (“0”). Any voltage level in between indicates improper programming. +5V VDD VDD CS DCLK DIO VSS VSS C2 100n VSS VDD I/O Output Output PROG 8.0 – 8.5V 10µF100n + |
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