发明名称 |
Repeater apparatus and method. |
摘要 |
<p>A discrete integrated repeater device and port MAU/AUI functions shares resources among its several ports. The device includes a single multi-bit free running counter providing preselected timing intervals to a plurality of latches. A signal undergoing measurement clears the latch while a preselected timing signal sets the latch. Receipt of a timing signal at a set latch indicates success or failure of some particular condition under test. The device satisfies an IEEE 802.3 specification for execution of a link integrity test. The device is also able to selectively disable or enable the link integrity test function for particular ports. A plurality of latches, one associated with each port, is set upon carrier sense detection at the particular port. A token passing mechanism implemented with a daisy chained line coupled to each latch enables a polling of each latch to provide carrier sense information about each port in a serial format. The device shares a single PLL among all its ports by producing a logical sum of carrier sense inputs to enable activation of the PLL. A collision indication signal will override operation of the PLL to ensure data integrity and to allow the PLL to reacquire lock on its reference clock.</p> |
申请公布号 |
EP0480596(A2) |
申请公布日期 |
1992.04.15 |
申请号 |
EP19910308683 |
申请日期 |
1991.09.24 |
申请人 |
ADVANCED MICRO DEVICES, INC. |
发明人 |
STAAB, DAVID;VIJEH, NADER |
分类号 |
H04B3/36;G01R29/027;H03K5/02;H03K5/156;H03K5/26;H03K19/0185;H04L12/28;H04L12/44;H04L12/46;H04L25/02;H04L25/08;H04L25/49 |
主分类号 |
H04B3/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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