Shrnutí

Na stránkách FT232R is a flagship device in FTDI’s range of USB-to-UART interface integrated circuits, designed to simplify USB to serial designs while offering a unique combination of security, functionality, and flexibility. This IC integrates several components that were previously external, such as the EEPROM, clock circuit, and USB resistors, making it highly compact and efficient. Additionally, the FT232R includes a built-in security feature, the FTDIChip-ID™—a unique identification number embedded in the device during manufacture, which allows it to be used as a security dongle for protecting software applications. With multiple new features, this IC proves invaluable in applications demanding robust performance, seamless connectivity, and data security.

Key Features and Benefits of the FT232R

Streamlined USB-to-UART Conversion

Na stránkách FT232R handles the entire USB protocol on-chip, eliminating the need for USB-specific firmware development. Its UART interface supports data transfer configurations such as 7 or 8 data bits, 1 or 2 stop bits, and a variety of parity options (odd, even, mark, space, or none). This flexibility enables wide adoption in various serial data communication systems, from industrial automation to embedded systems.

High-Performance Data Transfer Rates

One of the standout features of the FT232R is its high data transfer rate. Supporting up to 3 Megabaud for RS422/RS485 and TTL level communications, and up to 1 Megabaud for RS232, the IC ensures rapid and reliable data transmission across applications. This makes it suitable for real-time data communication systems where high throughput is critical.

Integrated Clock Generator and Power Options

In a space-constrained design, the FT232R offers the advantage of an internal clock generator that outputs frequencies of 6 MHz, 12 MHz, 24 MHz, or 48 MHz. This clock can be utilized to drive external components like microcontrollers or FPGAs, reducing the need for external oscillators. Furthermore, the device supports a wide range of power configurations, including bus-powered, self-powered, and high-power bus-powered modes, catering to different application requirements.

Security and Customization with FTDIChip-ID™

The FTDIChip-ID™ feature distinguishes the FT232R from its predecessors. This unique ID embedded in each device serves as a security token, enabling software protection by allowing the application to check for the presence of the correct hardware before it can run. This feature is particularly valuable for protecting intellectual property and ensuring that only authorized devices can interact with sensitive systems.

Expanded Functionalities for Modern Applications

Bit Bang Mode and CBUS Customization

Na stránkách FT232R extends its utility by providing both synchronous and asynchronous bit bang modes, which allow for direct control over the device’s input/output (I/O) pins. These modes are ideal for applications that require non-standard signaling. Additionally, the CBUS pins on the FT232R are configurable and can be set to different functions, such as driving LEDs for indicating data transmission and reception or controlling external components.

High Data Throughput with Buffer Technology

The device is equipped with 256-byte receive buffers and 128-byte transmit buffers that use advanced buffer smoothing technology. This ensures that the data transfer remains smooth even under high-throughput conditions. The adjustable receive buffer timeout adds further flexibility, making the FT232R adaptable to a wide range of data transfer applications.

Compact and Energy-Efficient Design

Na stránkách FT232R comes in RoHS-compliant 28-lead SSOP and QFN-32 packages, making it a compact solution for space-constrained designs. Additionally, its low operating current and minimal USB bandwidth consumption make it ideal for power-sensitive applications, including portable and battery-powered devices.

Aplikace a případy použití

USB-to-Serial Conversion

The primary application of the FT232R is converting USB data into serial data, making it a popular choice in devices that need to interface with legacy serial peripherals through modern USB interfaces. This makes it indispensable in industrial control systems, automation, and embedded designs.

Microcontroller and FPGA Clocking

With its integrated clock output functionality, the FT232R can provide clock signals to drive external microcontrollers or FPGAs, eliminating the need for additional clock components and simplifying system design.

Software Protection via FTDIChip-ID™

The security features embedded in the FT232R make it suitable for systems where software protection is critical. By leveraging the unique FTDIChip-ID™, developers can implement authentication mechanisms that ensure only authorized users or systems can access their applications.

Závěr

The FT232R USB-to-UART IC offers a comprehensive solution for serial communication needs in a variety of applications, from industrial systems to embedded devices. With its integrated components, high data transfer rates, and unique security features, this device not only simplifies system design but also enhances performance and protects intellectual property. Its compact design, combined with flexible power and clock options, makes it a versatile choice for engineers seeking a reliable and efficient USB-to-serial interface.

ČASTO KLADENÉ DOTAZY

Q1: What makes the FT232R different from previous USB-to-UART converters?
A: The FT232R integrates previously external components, such as the EEPROM and clock circuitry, making it more compact. It also introduces the FTDIChip-ID™ feature, which can be used for software protection.

Q2: Can the FT232R handle high data transfer rates?
A: Yes, the FT232R supports data transfer rates of up to 3 Megabaud for RS422/RS485 and TTL communications, and up to 1 Megabaud for RS232.

Q3: How can the FTDIChip-ID™ feature be used in applications?
A: The FTDIChip-ID™ provides a unique identifier for each device, which can be used to implement authentication mechanisms for software protection, ensuring only authorized hardware can access the system.

Q4: Is the FT232R suitable for power-sensitive applications?
A: Yes, the FT232R consumes low operating and suspend current, making it ideal for power-sensitive applications such as portable and battery-powered devices.

Q5: What package options are available for the FT232R?
A: The FT232R is available in Pb-free, RoHS-compliant 28-lead SSOP and QFN-32 packages, both of which are compact and suitable for space-constrained designs.