Error Correction and Data Compression

Table 21. V.44/V.42/V.42 bis and MNP Data Modem Command Descriptions (Continued)

Command

Default

 

Description

 

 

 

 

 

MNP Block Size: This command specifies the maximum number of data bytes in an MNP data frame. A

 

 

smaller frame size may improve throughput on high-impairment (noisy) telephone lines.

 

 

Range: 0–3

 

\An

3

n = 0

Maximum 64 characters

 

 

n = 1

Maximum 128 characters

 

 

n = 2

Maximum 192 characters

 

 

n = 3*

Maximum 256 characters

 

 

 

 

 

Transmit Break: This command causes the modem to send a break (attention signal) to the remote for

\Bn

3

duration specified by ‘n’. ‘n’ is specified in 100 ms units. When n = 0, the default break length is used.

 

 

Range: 0–9

 

 

 

 

 

 

Set Auto-Reliable Buffer (requires a license from Microcom*): In auto-reliable mode (+ES=3,0,2), this

 

 

command determines the fallback method and enables data buffering. The settings for this command are

 

 

used by the modem during the V.42 detection phase.

 

 

Range: 0–2

 

\Cn

0

n = 0*

Does not buffer data.

 

 

n = 1

Reserved.

 

 

n = 2

Does not buffer data. Switches to buffer (normal) mode upon receipt of auto-reliable

 

 

 

fallback character and passes it to serial port. This feature allows non-V.42 modems to

 

 

 

connect immediately to a V.42 modem without data loss.

 

 

 

 

 

Set Modem Port Flow Control: In buffer (normal) mode (either +ES=1,0,1 or after fallback), this

 

 

command enables modem-to-modem flow control using XOFF (13h) to stop and XON (11h) to start

\Gn

0

transmission between modems.

n = 0, 1

 

 

 

 

 

 

n = 0*

Disables port flow control

 

 

n = 1

Sets port flow control to XON/XOFF

 

 

 

 

 

bps Rate Adjust Control: If this command is enabled, the serial port speed automatically changes to the

 

 

modem-connection speed. This forces the user to change the DTE-to-modem bps rate, if needed. If the

 

 

command is disabled, the serial port speed is independent of the connection speed, which allows much

\Jn

0

greater throughput when using error correction and data compression.

n = 0, 1

 

 

 

 

 

 

n = 0*

Turns off feature

 

 

n = 1

Turns on feature

 

 

 

 

NOTE: An asterisk (*) denotes the factory-default setting.

58

536EX Chipset Developer’s Manual

Intel Confidential

Page 57 Page 59
Page 58
Image 58
Intel 537EX manual Bn
Page 57 Page 59

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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