LIR-DA190A

SSI

Info  CLOCK and DATA are not shown

CLOCK - input control signal
DATA - output signal with n bits

T - from 1 µs to 11 µs
t₁ > 0.45 µs
t₂ ≤ 0.2 µs
t₃ - from 12 to 35 µs

First CLOCK bus and DATA bus are set to logic 1. After first CLOCK decay DATA bus setting to 0 and encoder is storing position in buffer.

By the CLOCK fronts going bit-by-bit transmission of the fixed code value by DATA bus, then DATA is setting to logic 0 and stays for a time t₃. At this time, a fixed position code value can be re-read by setting CLOCK logic 0 and sending pulse. Repete may be done an unlimited number of times. After t₃ time DATA setting to logic 1 and encoder is ready for sending new frame. If during code reading state of CLOCK bus is not changing during time more than t₃, encoder is setting to initial state.