參數(shù)資料
型號: MC68838FCC
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 1 CHANNEL(S), 125M bps, FDDI CONTROLLER, CQFP120
封裝: CERAMIC, QFP-120
文件頁數(shù): 81/100頁
文件大小: 465K
代理商: MC68838FCC
MOTOROLA
MC68838 USER’S MANUAL
9- 5
To implement the various types of bridges and the resultant end stations discussed in the
ANSI and IEEE standards, the MAC can be used as follows:
1.
TR_BR_FWD, for a transparent bridge, and MATCH, for an end station, provide a
MAC status setting functionality.
2. Promiscuous mode provides a MAC status repeating functionality.
3. A MAC status clearing functionality is provided by Option_2 for an end station.
4. Both
MATCH and TR_BR_FWD provide the necessary timing extensions required
to perform source address routing and transparent bridging table lookup when
EXT_DA_MATCH = 1.
5. RABORT or RABORT2 can be used with the
MATCH or TR_BR_FWD pin, or in
promiscuous mode, to stop the transfer of a frame from the MAC to the FSI and to
properly set the C-bit for a rejected or incompletely received frame.
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