LS7766DH-TS Datasheet PDF - LSI Corporation

GENERAL DESCRIPTION:
   The LS7766 consists of two identical modules of 32-bit programmable up/down counters (CNTR) 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:
• Direct interface with Incremental Encoders
• 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
• Programmable IOs for Index and Marker Flags
• Separate mode-control registers for each axis
• 40MHz count frequency at 5V; 20MHz count frequency at 3V
• Sets of 32-bit counters, input registers, output registers,
   comparators and octal Status registers for each axis
• Digital filtering of the input quadrature clocks
   for noise immumity.
• Pin selectable 3-state Hex / Octal bus
• 3V to 5.5V operating voltage range
• Available in four different configurations identified
   by the following suffixes:
   DH = Dual-axis with pin selectable Hex/Octal IO Bus
   DO = Dual-axis Octal IO Bus
   SH = Single-axis pin selectable Hex/Octal IO Bus
   SO = Single axis Octal IO Bus