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型號：	MC68360FE25
廠商：	FREESCALE SEMICONDUCTOR INC
元件分類：	微控制器/微處理器
英文描述：	32-BIT, 25 MHz, RISC PROCESSOR, CQFP240
封裝：	CERAMIC, QFP-240
文件頁數(shù)：	473/962頁
文件大?。?/td>	26435K
代理商：	MC68360FE25

Serial Communication Controllers (SCCs)

MC68360 USER’S MANUAL

7.10.19.4.2 PSMR Programming. The PSMR programming sequence is as follows:

1. The NOF bits should be set to 0001 (binary) giving two flags before frames (one open-

ing flag, plus one additional flag).

2. The CRC should be set to 16-bit CRC-CCITT.

3. The DRT bit should be set.

4. All other bits should be set to zero or to their default condition.

7.10.19.4.3 TODR Programming. To expedite a transmit frame, the transmit on demand

7.10.19.4.4 AppleTalk Controller Example. Except for the previously discussed register

programming, the HDLC Example #1 may be followed.

7.10.20 BISYNC Controller

The byte-oriented binary synchronous communication (BISYNC) protocol was originated by

IBM for use in networking products. The three classes of BISYNC frames are transparent,

non-transparent with header, and non-transparent without header (see Figure 7-63). The

transparent mode in BISYNC allows full binary data to be transmitted with any possible char-

acter pattern. Each class of frame starts with a standard two-octet synchronization pattern

and ends with a block check code (BCC). The end of text character (ETX) is used to sepa-

rate the text and BCC fields.

The transparent frame type in BISYNC is not related to the total-

ly transparent protocol supported by the QUICC. See 7.10.21

Transparent Controller for details.

Figure 7-63. Typical BISYNC Frames

The bulk of the frame is divided into fields whose meaning depends on the frame type. The

BCC is a 16-bit CRC (CRC16) format if 8-bit characters are used; it is a longitudinal check

(a sum check) in combination with vertical redundancy check (parity) if 7-bit characters are

used. In transparent operation, to allow the BISYNC control characters to be present in the

frame as valid text data, a special character (DLE) is defined, which informs the receiver that

the character following the DLE is a text character, not a control character. If a DLE is trans-

mitted as valid data, it must be preceded by a DLE character. This technique is sometimes

called byte-stuffing.

NON-TRANSPARENT WITH HEADER

NON-TRANSPARENT WITHOUT HEADER

TRANSPARENT TEXT

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
MC68360FE25C	制造商:Motorola Inc 功能描述:
MC68360FE25V	制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:QUad Integrated Communications Controller Users Manual
MC68360FE33	制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:QUad Integrated Communications Controller Users Manual
MC68360FE33C	制造商:Motorola Inc 功能描述:
MC68360RC25	制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:QUad Integrated Communications Controller Users Manual

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