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The iC-MD processes quadrature encoder signals (with A, B and index) of up to 3 incremental encoders. Possible counter configurations are 1x 48 bit, 2x 24 bit, 3x 16 bit, 1x 32+1x 16 bit. Various input signals are applicable: differential RS422 and up to 12 V levels and TTL, CMOS and LVDS logic signals. The device can be accessed by a microcontroller via its SPI interface, or can be operated as a BiSS C or SSI slave device.

The implemented touch probe function is triggered by pin TPI, configurable to be sensitive at the rising, falling or both edges. Upon the trigger register TP1 is loaded with the actual value of Counter 0, whereas the former value of TP1 is shifted to register TP2. Thus, evaluating a distance between two events is made easy for the external controller, even for timing critical applications.

An additional 24 bit reference counter is available to latch the number of pulses between consecutive index signals, to evaluate distance-coded reference marks (REF and UPD register).