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DS31256 数据表(PDF) 183 Page - Maxim Integrated Products |
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DS31256 数据表(HTML) 183 Page - Maxim Integrated Products |
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183 / 183 page  DS31256 256-Channel, High-Throughput HDLC Controller 183 of 183 Maxim/Dallas Semiconductor cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim/Dallas Semiconductor product. No circuit patent licenses are implied. Maxim/Dallas Semiconductor reserves the right to change the circuitry and specifications without notice at any time. Ma x i m In tegra t ed P roduc ts , 1 2 0 S a n Ga brie l D r iv e , Sun n y vale , CA 94 086 40 8 -7 3 7 -76 00 © 2006 Maxim Integrated Products • Printed USA The Maxim logo is a registered trademark of Maxim Integrated Products, Inc. The Dallas logo is a registered trademark of Dallas Semiconductor Corp. 17.4 Single T3 with 672 HDLC Channel Support Figure 17-7 shows an application where a fully channelized T3 line is interfaced to three DS31256s. The T3 line is demultiplexed by the M13 block and passed to the DS21FF42 and DS21FT42 devices. The T1 framers locate the frame and multiframe boundaries and interface to the DS31256. Aggregating four T1 lines into a single 8.192MHz data stream is not required since the DS31256 has enough physical ports to support the applicationm, but aggregation could be done to cut down on the number of electrical connections between the DS31256 and the T1 framers. The T1 lines can be either clear channel or channelized. Figure 17-7. T3 Application (672 HDLC Channels) DS31256 #1 (Supports 10 T1 Lines) DS21FF42 Four x Four 16-Channel T1 Framer DS21FT42 Four x Three 12-Channel T1 Framer M13 Interface 1 2 16 Port 0 Port 1 Port 2 Port 3 17 18 28 Port 4 Port 5 Port 6 Port 7 Port 8 Port 9 Port 10 Port 11 Port 12 Port 13 Port 14 Port 15 Port 0 Port 1 Port 2 Port 3 Port 4 Port 5 Port 6 Port 7 Port 8 Port 9 Port 10 Port 11 Port 12 Port 13 Port 14 Port 15 Port 0 Port 1 Port 2 Port 3 Port 4 Port 5 Port 6 Port 7 Port 8 Port 9 Port 10 Port 11 Port 12 Port 13 Port 14 Port 15 DS3112 DS31256 #2 (Supports 10 T1 Lines) DS31256 #3 (Supports 8 T1 Lines) |
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