CY7C68023-56LFXC

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CY7C68023-56LFXC is a USB based, low-pin-count, low-cost, external memory controller with an integrated asynchronous FIFO interface. It is optimized for use with low-cost, n-bit wide external synchronous or asynchronous SRAM or FIFO memories. It supports up to 64 KB of SRAM or FIFO memory, with n-bit data widths of 8, 9, 10, 11, 16, 17, 18, and 19 bits. Its flexible multiplexed I/O capabilities accommodates a wide range of memory configurations.

The CY7C68023-56LFXC operates as a single-chip, low-cost, low-pin-count, external memory controller and FIFO interface. It supports both synchronous and asynchronous external memories and FIFOs, making it an ideal solution for embedded applications requiring external memory and FIFO access. It also provides high performance 8/9/10/11/16/17/18/19-bit wide external memory and FIFO interfaces. It has a built-in 16KB byte FIFO that can handle high speed burst data transfers between memory and microprocessor.

CY7C68023-56LFXC\'s main application fields are for usb-interface to external memories, external storage devices, Analog-to-Digital conversion, Navigation and Imaging applications. These applications exploit the CY7C68023-56LFXC low cost, high performance and flexibility advantages.

In USB-interface applications, the controller is connected to the system CPU’s USB port, where it functions as an external memory or FIFO controller. It supports a wide variety of n-bit wide synchronous or asynchronous SRAM and FIFO memories, which can be interfaced to the controller with speeds in excess of 10Mbit/s. The wide data width capability makes this controller well suited to applications using large amounts of data.

In external storage devices, the controller provides access to device\'s internal memories such as Flash memories, NOR memories, PC-cards and other non-volatile memories. The controller can also be used to interface to Digital Signal Processing (DSP) and other Analog-to-Digital (A/D) and Digital-to-Analog (D/A) converter applications.

In Navigation applications, the controller can be used for tracking and updating position information. It can also be used for mapping, telemetry and guidance functions. For imaging applications, this controller is used along with a high-speed image processor to enhance image resolution.

The working principle of CY7C68023-56LFXC is that it acts as a bridge between a memory or FIFO device and a memory or FIFO access port on a microcontroller. The controller has a register-file architecture that supports up to n-bit wide external memory and FIFO interfaces. The data bus is designed with a low-pin count, low-power consumption, and flexible multiplexing capabilities. The hardware logic of the controller uses pipelined write and read operations on the memory and FIFO interfaces. This helps reduce the latency of the external access commands, and thus improves the performance of the device.

For write operations, the memory interface logic will accept an address and write data command, and transfer the write data to the external memory in a single cycle, while the read operations could fetch the data from the external memory in a single cycle as well. The pipelined approach helps reduce the latency associated with external memory and FIFO accesses.

In addition, the CY7C68023-56LFXC also provides various operational capabilities to ease the programming of applications. The programmable addressing modes, the interrupt services, and the DMA support are all used to facilitate the development of external I/O operations. The CY7C68023-56LFXC also supports a host of other features such as programmable timing, programmable delays, read ahead buffering, write behind buffering, and AHB slave interface.

Overall, the CY7C68023-56LFXC is a versatile and low-cost external memory and FIFO interface controller that is optimized to provide high performance access to the external memories and FIFOs. It is well suited for USB-interface applications, external storage devices, DSP, and imaging applications.

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