ST3232BDR

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ST3232BDR is a full-duplex transceiver designed for such serial bus applications as microprocessor systems, graphics terminals, printers, and other data communications systems. The device is designed for operation in the STbus, a three wire bi-directional asynchronous serial bus. The ST3232BDR is a fully-integrated design which includes the driver, receiver, clock and data regeneration, device control, and a 12-byte FIFO (First-in-First-out).

The ST3232BDR device supports data rates up to 16 Mbps and is optimized for low power consumption. Its power budget is typically 2.3 mA at 3.3V, making it ideal for battery-powered and low voltage applications. The device can run in either five-volt or three-volt systems, and its IO pins are tolerant of 5V signal levels.

The device includes a programmable 12-byte FIFO, which can be placed in either Rx or Tx FIFO mode. In Rx FIFO mode, the FIFO stores ASCII data from the bus, which is then read out via the device\'s serial interface. In Tx FIFO mode, the FIFO stores ASCII data to be transmitted on the bus. The FIFO also features an auto-fill function, which allows the user to pre-load a block of data from the host into the FIFO prior to transmitting. The data is then only transmitted when the host system issues a "begin transmission" command.

The ST3232BDR is a highly versatile device, which can be used in a variety of applications. It is suitable for microcontroller and microprocessor systems, graphics terminals, printers, and other data communications systems. The device has been designed to meet the EIA/TIA-232-F and ISO/IEC 11801 standards, allowing it to be used in a wide variety of systems.

The ST3232BDR\'s external components are minimal: 2 resistors and 2 capacitors are used to provide power and control, while the two bus lines are connected directly to the connectors. The device is designed to be self-contained, requiring little or no external components for system level operation. The device utilizes differential signaling for increased common-mode interference rejection and EMI immunity.

The ST3232BDR features a D-type port which supports a two-wire half-duplex communications protocol. The serial port supports 3-wire transmission of 1 byte to 16 byte serial messages, and a half-duplex, two-wire serial port with optional receive and transmit interrupts. The device also includes a multi-function serial port, with selectable transfer rates up to 16 Mbps, as well as a half-duplex, two-way transmit/receive with automatic retransmission, and UART format communications with interrupt control and overload indicator.

The ST3232BDR utilizes a System Controller, which manages interrupts from the device, the FIFO, and the serial port, as well as serves as a bus manager. This controller allows the device to easily communicate with the system, whether it is a microprocessor, microcontroller, graphics terminal, printer, or any other application requiring serial communications.

The ST3232BDR is a low-power, high-performance transceiver device, providing a link between the standard serial/parallel data transmission interface and the bus. Its versatile design supports a wide variety of data communications applications and is architecturally optimized to minimize power consumption. The device provides a robust and reliable solution for applications requiring a full-duplex, high-speed transceiver.

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