參數(shù)資料
型號(hào): MB89374
廠商: Fujitsu Limited
英文描述: Data Link Controller (DLC)(數(shù)據(jù)鏈接控制器)
中文描述: 數(shù)據(jù)鏈路控制器(金剛石)(數(shù)據(jù)鏈接控制器)
文件頁(yè)數(shù): 37/45頁(yè)
文件大?。?/td> 328K
代理商: MB89374
37
MB89374
I
DATA FORMAT
1. Receiving
Figure 2 shows the receive data format supported by the DLC.
2. Transmitting
Figure 3 shows the transmit data format supported by the DLC.
Fig. 2 Receive Data Format
Opening flag
(01111110)
Closing flag
(01111110)
Address field
(A)
1 or 2 bytes
Control field (A)
1 or 2 bytes
Information field
(I)
n bytes
Frame check sequence
(FCS)
2 bytes
Data to be read from DLC when CRC enabled
Data to be read from DLC when CRC disabled
The data in the address field is always read from the DLC regardless of whether address comparison is specified.
When CRC is enabled, the FCS data is used only for the CRC check and is not read from the DLC.
The data in the control and information fields can be read from the DLC.
Fig. 3 Transmit Data Format
Opening flag
(01111110)
Closing flag
(01111110)
Address field
(A)
1 or 2 bytes
Control field (A)
1 or 2 bytes
Information field
(I)
n bytes
Frame check sequence
(FCS)
2 bytes
Data to be read from DLC when CRC enabled
Data to be read from DLC when CRC disabled
The data in the address field is written as the transmit data to the DLC.
When CRC is enabled, the FCS data is transmitted automatically to the DLC.
The data in the control and information fields can be written to the DLC.
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