GENERAL DESCRIPTION:

The LS7566R 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 fur

ther configured into free-running, non-recycle, modulo-n and range-limit count modes. The mode configuration is made through two 8-bit read/write addressable control registers, MDR0 and MDR1.

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 immumity.

• 3-state Octal I/O bus

• 3V to 5.5V operating voltage range

• LS7566R-TS (TSSOP) - See Figure 1-