Error Correction and Data Compression

Error Correction and Data

Compression4

The 536EX chipsets support two types of data mode error correction (MNP 2–4 and V.42) and data compression (V.44, MNP 5, and V.42 bis). V.42 error correction uses LAPM as the primary error- control protocol and uses MNP 2-4 as an alternative. V.44 provides enhanced data compression over the existing V.42 bis standard. Data compression is up to on average 40% faster than previous methods. This provides for faster web browsing and data downloading. The +DS44 command configures the operation of V.44. There are nine parameters associated with the +DS44 command. For a detailed description of this command, refer to Table 6. V.42 bis data compression requires V.42 (LAPM only). MNP 5 requires MNP 2-4.

The 536EX chipsets support four operating modes: buffer (normal), MNP reliable, V.42 auto- reliable, and V.42 reliable. They allow the DCE to communicate with remote modems that may or may not support error correction and data compression. Speed buffering, which is used for all operating modes, allows the DTE-to-modem data rate to be different from the modem-to-modem data rate. This is accomplished by using transmitter and receiver buffers in the modem. Thus, the DTE-to-modem data rate can be set for 2400 bps when the modem-to-modem data rate is 300 bps without causing any data errors. In all data modes, the DTE-to-modem data rate can be set for any valid speed between 300 bps to 115,200 bps (that is, the modem autobauds up to 115,200 bps). See Table 1 on page 11 for all DTE-to-DTE data rates. The modem-to-modem data rates are listed in Table 2 on page 11. See Table 3 on page 11 for the modem-to-ISP data rates. Each operating mode is explained in more detail in the following tables.

Table 19. Operating Modes

Mode

Features

 

 

Buffer (Normal)

No error correction/data compression, but speed buffering is supported.

+ES=1, 0, 1

 

 

 

MNP Reliable

MNP 2–5 connection only. If an MNP connection cannot be established, the modem

+ES=4, 4, 6

hangs up.

 

 

V.42 Auto-Reliable

V.42/V.42 bis with fallback to MNP 2–5 or normal mode.

+ES=3, 0, 2

 

 

 

V.42 Reliable

V.42, V.42 bis or MNP 2–5 only connection. If a V.42/V.42 bis/MNP 2–5 connection

+ES=3, 2, 4

cannot be established, the modem hangs up.

 

 

Table 20 lists connection types corresponding to +ES settings.

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536EX Chipset Developer’s Manual

Intel Confidential

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Intel 537EX manual Operating Modes, Mode Features
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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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