LS7566 Datasheet PDF - LSI Corporation

GENERAL DESCRIPTION:
The  LS7566  consists  of  four  identical  modules  of  24-bit  programmable counters with direct interface to incremental encoders. The modules can be configured to operate as quadrature clock  counters  or  non-quadrature  up/down  counters.  In  both quadrature and non-quadrature modes, the modules can be further  configured  into  free-running,  non-recycle,  modulo-n  and range-limit  count  modes. 

FEATURES:
• Read/write registers for count and I/O modes.
  Count modes include: Non-quadrature (Up/Down), Quadrature
  (x1, x2, x4), Free-run, Non-recycle, Modulo-n and Range limit
• Separate mode-control registers for each axis
• Interrupt output and interrupt mask register.
• 40 MHz count frequency, 5V
  20 MHz count frequency, 3V
• Sets of 24-bit counters, preset registers, comparators and output latches and 8-bit status registers for each axis
• Digital filtering of the input quadrature clocks for noise immunity.
• 3-state Octal I/O bus
• 3V to 5.5V operating voltage range
• LS7566-TS (TSSOP) -See Figure 1-