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Data Sheet - D e ta i l e d D e s c r i p t i o n
Serial 3-Wire Read-only Connection
This simplified connection is possible when the AS5134 is only used to provide the angular data (no power down or
OTP access). The Chip Select (CS) and Clock (DCLK) connection is the same as in the R/W mode, but only a digital
input pin (not an I/O pin) is required for the DIO connection. As the first 5 bits of the data transmission are command
bits sent to the AS5134, both the microcontroller and the AS5134 are configured as digital inputs during this phase.
Therefore, a pull-down resistor must be added to make sure that the AS5134 reads “00000” as the first 5 bits, which
sets the Read_Angle command.
Note: All further application examples are shown in R/W mode, however read-only mode is also possible unless
Figure 4. SSI Read-only Serial Data Transmission
Table 5. Serial Bit Sequence (16bit read/write)
C4 C3 C2
C0 D15 D14 D13 D12 D11 D10 D9