MLX90316_05 Datasheet, PDF (23/34 Pages) List of Unclassifed Manufacturers – Rotary Position Sensor IC

MLX90316
Rotary Position Sensor IC
16.9. Slave Reset
On internal soft failures the Slave resets after 1 second or after an (error) frame is sent. On internal hard
failures the Slave resets itself. In that case, the Serial Protocol will not come up. The serial protocol link is
enable only after the completion of the first synchronization (the Master deactivates /SS for at least t5).
16.10. Frame Layer
16.10.1. Command Device Mechanism
Before each transmission of a data frame, the Master should send a byte AAh to enable a frame transfer.
The latch point for the angle measurement is at the last clock of the first data frame byte.
Latch point
/SS
SCLK
MOSI
MISO
AF F F F F F F F F
AF F F F F F F F F
F
F
F
F
D
A
T
A
F
F
F
F
F
F
F
F
Timing diagram
AF F
AF F
F
F
F
F
D
16.10.2. Data Frame Structure
A data frame consists of 10 bytes:
• 2 start bytes (AAh followed by FFh)
• 2 data bytes (DATA16 – most significant byte first)
• 2 inverted data bytes (/DATA16 - most significant byte first)
• 4 all-Hi bytes
The Master should send AAh followed by 9 bytes FFh. The Slave will answer with two bytes FFh followed
by 4 data bytes and 4 bytes FFh.
16.10.3. Timing
There are no timing limits for frames: a frame transmission could be initiated at any time. There is no inter-
frame time defined.
3901090316
Rev. 001
Page 23 of 34
Data Sheet
4 October 05