Quadrature Counter IC offers multi-mode programmability.

Press Release Summary:

Operating over voltage range of 3-5.5 V, 32-bit Model LS7366R with SPI decodes and counts quadrature clocks directly from incremental encoders, offering solution to position and displacement tracking at 40 x 106/sec line rate from encoder and count limit of 232. Unit can also operate with non-quadrature clock signals and provides various counting modes for signal conditioning. Programming and communications between IC and host controller are made with 4 instructions.


Original Press Release:

32-bit Quadrature Counter with Serial (SPI) Interface Offers Multi-Mode Programmability

Melville, NY, July 27, 2009 - LSI/CSI announces the expansion of their line of Encoder Interface/Quadrature Counter ICs with the addition of the LS7366R, an Integrated Circuit for decoding and counting quadrature clocks directly from Incremental Encoders. According to Pete Visconti, VP Sales and Marketing, "A huge advantage is gained by our customers in that the LS7366R provides for a dedicated solution to position and displacement tracking at 40x106/sec line rate (at 5V) from the encoder and a count limit of 232. Its serial interface (SPI) greatly reduces the required IO wire count as compared to a parallel bus structure." It can also operate with non-quadrature clock signals and provides various counting modes for signal conditioning. The LS7366R operates over the voltage range of 3V to 5.5V. Programming of the LS7366R and all communications between itself and a host controller are made with four simple instructions: READ_reg, WRITE_reg, LOAD_reg and CLEAR_reg. The functional modes are controlled with two bytes of data written into two on-chip Mode Registers. The configurable modes are:
o Quadrature/non-quadrature count inputs
o Quad cycle resolution selection by factor of x1, x2 or x4
o Modulo-n counting for programmable frequency generation
o Range-limit counting for Limit-switch emulation
o Single-cycle counting
o 1-Byte/2-Byte/3-Byte/4-Byte counter modes with auto-adjust of IO byte count. The Count related status is stored in a Status register. A 32-bit Input Register along with a 32-bit Comparator is provided for comparing a target value with the instantaneous count. Two maskable output Flags are also provided for signaling count related events. The Index and the Quadrature inputs are digitally filtered for noise suppression. The LS7366R is offered in 14-Pin DIP, SOIC and TSSOP packages Unit price for LS7366R in 1k quantity is $1.60. The complete Data Sheet for this device, as well as all of our Standard Products, can be found by visiting our Web Site, www.lsicsi.com. For more information, including price quotes and technical assistance, please contact sales@lsicsi.com. ABOUT LSI COMPUTER SYSTEMS, INC.
LSI Computer Systems, Inc. (LSI/CSI) began operations as the world's first fabless semiconductor company in 1969. Since its inception, LSI/CSI has been a leader in the design and production of affordable full custom and standard mixed signal, digital and analog integrated circuits. Using a broad array of process technologies, LSI/CSI has produced ICs that extend from the consumer and industrial marketplace to military and aerospace applications. The company's proven expertise and strong reputation have made LSI/CSI the IC provider of choice for leading manufacturers in a broad range of industries.

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