It is called Poll when part of a command set by the primary station to obtain a response from a secondary station , and Final when part of a response set by the secondary station to indicate a response or the end of transmission. In all other cases, the bit is clear. The bit is used as a token that is passed back and forth between the stations. Only one token should exist at a time. The secondary only sends a Final when it has received a Poll from the primary.

Author:Kirisar Voodooshicage
Language:English (Spanish)
Published (Last):3 September 2015
PDF File Size:19.15 Mb
ePub File Size:11.87 Mb
Price:Free* [*Free Regsitration Required]

Parameters: algorithm - the desired checksum algorithm. Returns: the Checksum object instance of the requested algorithm. Throws: CryptoException - with the following reason codes: CryptoException.

Parameters: bArray - byte array containing algorithm specific initialization information bOff - offset within bArray where the algorithm specific data begins bLen - byte length of algorithm specific parameter data Throws: CryptoException - with the following reason codes: CryptoException. Within each byte the processing proceeds from the least significant bit to the most.

Completes and returns the checksum computation. The Checksum object is reset to the initial state state upon construction when this method completes.

The initial checksum value can be re-initialized using the init byte[], short, short method. The input and output buffer data may overlap. In addition to returning a short result, this method sets the result in an internal state which can be rechecked using assertion methods of the SensitiveResult class, if supported by the platform.

This method requires temporary storage of intermediate results. This method should only be used if all the input data required for the checksum is not available in one byte array.

The doFinal byte[], short, short, byte[], short method is recommended whenever possible. Note: If inLength is 0 this method does nothing. Parameters: inBuff - the input buffer of data to be checksummed inOffset - the offset into the input buffer at which to begin checksum generation inLength - the byte length to checksum See Also:.

234 PDF

Subscribe to RSS

NOK 2 ,00 eks. However, the frame as an entirety may be constructed from octet-oriented units e. The mechanisms used to achieve bit pattern independence transparency , where and when required, within the frame are also defined. In addition, three frame checking sequences FCS are specified; the rules for address field extension are defined; and the addressing conventions available are described. This International Standard does not define any single system and should not be regarded as a specification for a data communication system. Not all of the commands or responses are required for any particular system implementation.


ISO/IEC 13239:1997


Related Articles