VNC1L-1A-REEL

Controllers Overview

The VNC1L-1A-REEL is an embedded dual USB host controller IC from Future Technology Devices International Ltd. It features two independent USB 2.0 Low-speed/Full-speed ports, each configurable as host or slave. The device integrates an 8/32-bit Vinculum MCU core with 64k bytes of embedded Flash and 4k bytes of data RAM. It supports UART, FIFO, or SPI command monitor interfaces and includes twin DMA controllers for hardware acceleration. Operating on a single +3.3V supply with 5V safe inputs, it functions within a -40°C to +85°C temperature range and is housed in a 48-pin LQFP package.

Controllers Feature Summary

• Dual independent USB 2.0 Low-speed/Full-speed host ports with integrated transceivers and pull-up/pull-down resistors.
• Integrated Vinculum MCU processor core with 64k bytes of embedded Flash memory and 4k bytes of data RAM.
• Configurable interface options including UART, Parallel FIFO, and SPI slave for external command monitoring.
• Twin DMA controllers providing hardware acceleration for data transfer between USB interfaces and external I/O buses.

Controllers Applications

• Adding USB host capability to embedded products lacking native USB support.
• Interfacing USB Flash drives to MCUs, PLDs, or FPGAs.
• Creating file transfer interfaces between USB Flash drives or digital cameras.
• Connecting MP3 players or mobile phones to USB Flash drives.
• Data logging and instrumentation applications requiring USB storage access.

Controllers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure correct packaging and variant details. Confirm that the required firmware version matches the intended application, as the device ships blank and requires initial programming via UART or USB. Ensure compatibility with the target system's voltage levels and interface requirements before integration.

Controllers Selection Notes

Select this component when a compact solution for dual USB host functionality is required without external protocol handling. Consider the available firmware options such as VDAP, VDPS, or VDFC based on whether single or dual flash disk support is needed. Evaluate the interface configuration needs, choosing between UART, FIFO, or SPI modes depending on the controlling microcontroller's capabilities.

Controllers Part Context

The VNC1L is part of the Vinculum family of embedded USB host controllers designed by Future Technology Devices International Ltd. It serves as a cost-effective solution for introducing USB host capabilities into embedded systems. The device encapsulates USB host interface and data transfer functions using its built-in MCU and embedded Flash memory, simplifying design for mass storage devices.

Controllers Replacement Considerations

No direct public substitute part numbers are documented in the provided datasheet. Designers should evaluate other FTDI Vinculum family members or comparable USB host controllers based on pin compatibility and firmware support requirements.

Controllers FAQ

How is the VNC1L programmed initially?

The VNC1L ships as a blank device. Initial programming must be performed in-circuit via the UART interface by pulling the PROG# pin low and resetting the device to enter bootloader mode.

What interface modes are supported for command monitoring?

The VNC1L supports three configurable interface modes for the command monitor: UART, Parallel FIFO, and SPI Slave. The mode is selected using pins ACBUS5 and ACBUS6.

Can the USB ports operate as both host and slave?

Yes, the two independent USB ports can be individually configured as either host or slave modes depending on the firmware and application requirements.