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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AM79C982 датащи(PDF) 13 Page - Advanced Micro Devices |
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AM79C982 датащи(HTML) 13 Page - Advanced Micro Devices |
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13 / 26 page  AMD PRELIMINARY 1–15 Am79C982 ARBITER Am79C982 bIMR Chip 1 ACK COL RST X1 ACK COL RST X1 DAT JAM REQ DAT JAM ACK COL RST X1 DAT JAM D FF CK Q D XTAL OSC. ASYNC RESET 1/2 ’74 COL ACK ACK REQ REQ REQ Am79C982 bIMR Chip 2 Am79C982 bIMR Chip 3 Bus transceivers needed if DAT and JAM buses exceed 100 pF loading. AB DIR Note 1 Note 1: Direction DIR B → A LOW A → B HIGH 19406B-6 REQ2 REQ3 REQ1 Figure 1. Multiple bIMR Devices Modular Repeater Design The expansion port of the bIMR chip also allows for modular expansion. By sharing the arbitration duties be- tween a backplane bus architecture and several sepa- rate repeater modules one can build an expandable repeater based on modular ‘plug-in’ cards. Each repeat- er module performs the local arbitration function for the bIMR devices on that module, and provides signals to the backplane for use by a global arbiter. |
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