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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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DS31256 数据表(PDF) 160 Page - Maxim Integrated Products |
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DS31256 数据表(HTML) 160 Page - Maxim Integrated Products |
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160 / 183 page  DS31256 256-Channel, High-Throughput HDLC Controller 160 of 183 Figure 11-10. 8-Bit Write Cycle Motorola Mode (LIM = 1) Arbitration Enabled (LARBE = 1) Bus Transaction Time = 6 LCLK (LRDY = 0110) An attempted access by the host causes the local bus to request the bus. If bus access has not been granted ( LBGACK deasserted), the timing shown at the top of the page occurs, with LBR being asserted. Once LBG is detected, the local bus grabs the bus for 32 to 1,048,576 clocks and then releases it. If the bus has already been granted ( LBGACK asserted), the timing shown at the bottom of the page applies. LCLK LBR LBG LBGACK 32 to 1,048,576 LCLKs LA[19:0] LD[7:0] LD[15:8] LR/ W LDS Address Valid Data Valid LBHE Tri-State Tri-State Tri-State Tri-State Tri-State Tri-State LCLK 12 34 5 6 Note: LA, LD, LBHE, LDS, and LR/W are tri-stated. |
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