Parallel Host Interface 16C450/16C550A UART

Parallel Host Interface 16C450/16C550A

UART

9

9.1UART Emulation in the Controllerless Modem

When controllerless modems are used with Windows applications, the communication driver architecture eliminates the need for a UART emulation (see Section 1.1, “Controllerless Modem Driver Overview” on page 7). However, MS-DOS applications used with controllerless modems retain the need for a UART emulation. Therefore, Intel provides the Intelsdb.VXD driver, which includes this UART emulation and also interacts directly with the Windows VCOMM.VxD driver (see Figure 11).

Figure 11. UART Emulation in Intelsdb.VxD

MS-DOSAPPLICATION

Intelsdb.VXD

WINDOWSAPPLICATION

UART EMULATION

HAM PORT DRIVER

VCOMM.VXD

The parallel host interface of the FastPath family emulate the electrical and register functions of a 16550A and 16C450 UART. Upon modem reset, the modem defaults to a 16C450. The host (DTE) can then configure the UART to function as a 16C550A UART.

In 16C450 emulation mode, the DTE and modem transfer data back and forth a byte at a time. In 16C550A emulation mode, the modem provides two 16-byte FIFO buffers, one for the transmitter and another for the receiver. Thus, up to 16 bytes of data may be sent to or received from the

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536EX Chipset Developer’s Manual

Intel Confidential

Page 91 Page 93
Page 92
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Intel 537EX manual Uart Emulation in the Controllerless Modem, Uart Emulation in Intelsdb.VxD
Page 91 Page 93

537EX specifications

The Intel 537EX is a powerful and innovative embedded processor designed for a range of applications, particularly in the fields of industrial automation, telecommunications, and transport management systems. This processor is a member of Intel's embedded product line, tailored specifically to meet the demands of systems that require high reliability and long lifecycle support.

One of the main features of the Intel 537EX is its multi-core architecture, which enables efficient parallel processing capabilities. This allows for the execution of multiple tasks simultaneously, significantly improving overall system performance. The processor also incorporates Intel’s advanced power management technology, which ensures that the device consumes energy efficiently, enhances thermal performance, and prolongs the lifespan of the system.

The Intel 537EX supports a range of connectivity options, including high-speed Ethernet and Serial ATA interfaces. This ensures that it can easily integrate into existing systems, seamlessly supporting applications that require robust data transfer capabilities. Additionally, the processor is equipped with multiple I/O ports, facilitating the connection of various peripherals and sensors, which is crucial in industrial applications.

One of the standout technologies within the Intel 537EX is its support for hardware virtualization. This feature allows for the creation of multiple virtual environments within a single physical structure, optimizing resource utilization and enhancing system flexibility. Additionally, Intel’s integrated security technologies provide a significant layer of protection against potential threats, ensuring that embedded systems remain secure.

Another characteristic of the Intel 537EX is its extensive software support, which includes compatibility with various operating systems and development environments. This versatility makes it an attractive choice for developers looking to build or upgrade their embedded systems. With access to Intel's comprehensive software tools, developers can quickly optimize applications to take full advantage of the processor's capabilities.

The Intel 537EX also boasts excellent thermal performance, allowing it to operate efficiently in harsh environments. This is crucial for embedded applications in industrial settings where temperature fluctuations are common. Overall, the Intel 537EX is engineered to deliver high-performance processing power, superior connectivity, and enhanced security, solidifying its position as a reliable choice for demanding embedded applications.
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