1. Device Overview:

️· Device: AS5134 Magnetic Encoder
️· Function: Provides angle information from a rotating magnet.

2. Connection Modes & Communication:

The AS5134 supports various communication methods, offering flexibility in integration:

️· Serial 3-Wire R/W: Read/Write functionality, allowing commands and data exchange. Requires Chip Select (CS), Clock (DCLK), and Data In/Out (DIO) signals.
️· Serial 3-Wire Read-Only: Used when only angle data is needed, and no commands are sent. Requires CS, DCLK, and DIO. A pull-down resistor is needed.
️· Serial 2-Wire (R/W Mode): A reduced pin count option for read/write functionality. Uses CS, DCLK, and a shared DIO line.
️· Serial 2-Wire Differential SSI: A differential signal option.
️· 1-Wire PWM: Output angle information as a Pulse Width Modulated (PWM) signal.
️· Analog Output: Output angle as an analog voltage.
️· Quadrature A/B/Index: Provides incremental angle information.
️· Brushless DC Motor Commutation Mode: Supports commutation control for BLDC motors.
️· Daisy Chain Mode: Allows connecting multiple AS5134 devices in series.

3. Key Parameters and Timing (from Tables):


Serial 3-Wire R/W

️· t0: Rising DCLK to CS: 15 ns
️· t1: Chip select to positive edge of DCLK: 15 ns
️· t3: Setup time command bit: 30 ns
️· t4: Hold time command bit: 30 ns
️· t5: Float time: 30 ns to DCLK/2
️· t6: Bus driving time: DCLK/2 + 0 to DCLK/2 + 30 ns
️· t7: Setup time data bit: DCLK/2 + 0 to DCLK/2 + 30 ns
️· t8: Hold time data bit: DCLK/2 + 0 to DCLK/2 + 30 ns
️· t9: Hold time chip select: 30 ns
️· t10: Bus floating time: 0 to 30 ns
️· tTO: Timeout period in 2-wire mode (from rising edge of DCLK): 17 to 27 µs (microseconds)

Serial 3-Wire Read-Only

️· Uses the same timing parameters as the Read/Write mode, but specific values aren't emphasized in this excerpt.

2-or 3-wire Read-only Serial Bit Sequence
️· C4, C3, C2, C1, C0 are command bits. '00000' selects the Read_Angle command.
️· lock, AGC (Automatic Gain Control), and Angle bits follow.

4. Important Notes:

️· C2 Input: Configures the device between 3-wire R/W (C2 = low) and 2-wire mode (C2 = high).
️· Read-Only Mode: Requires pull-down resistor on the DIO signal during initial command reception (first 5 bits).
️· Timing: All timing parameters (t0, t1, t3, etc.) are critical for reliable communication.