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T8301 Datasheet(PDF) 20 Page - Agere Systems |
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T8301 Datasheet(HTML) 20 Page - Agere Systems |
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20 / 190 page  20 Lucent Technologies Inc. Phone-On-A-Chip IP Solution DSP T8301 Internet Protocol Telephone Advance Data Sheet December 2000 5 Audio Input/Output Circuitry (continued) 5.5 Audio Codec Block The T8301 contains a 16-bit analog-to-digital converter and two 16-bit digital-to-audio converters. These convert- ers each contain appropriate antialiasing or smoothing filters. A block diagram of the audio codec block is shown below. . 5-8212 (F) Figure 5. Audio Codec Block Diagram 2,087 02 727.3 3B 440.4 F6 315.8 A3 247.4 F7 203.4 7D 2,000 01 716.4 9D 436.4 7B 313.7 D1 246.2 FB 202.5 3E 1,920 80 705.9 4E 432.4 BD 311.7 68 244.9 FD 201.7 9F 1,846 40 695.7 27 428.6 5E 309.7 B4 243.7 7E 200.8 4F 1,778 20 685.7 13 424.8 AF 307.7 5A 242.4 BF 200.0 A7 1,714 10 676.1 09 421.1 D7 305.7 2D 241.2 5F 199.2 53 1,655 88 666.7 04 417.4 EB 303.8 96 240.0 2F 198.3 29 1,600 C4 657.5 82 413.8 75 301.9 4B 238.8 97 197.5 14 1,548 E2 648.6 41 410.3 BA 300.0 25 237.6 CB 196.7 0A 1,500 71 640.0 A0 406.8 5D 298.1 12 236.5 65 195.9 85 1,455 38 631.6 50 403.4 2E 296.3 89 235.3 32 195.1 42 1,412 1C 623.4 A8 400.0 17 294.5 44 234.1 99 194.3 21 1,371 8E 615.4 D4 396.7 8B 292.7 A2 233.0 CC 193.5 90 1,333 47 607.6 6A 393.4 45 290.9 51 231.9 66 192.8 C8 1,297 23 600.0 B5 390.2 22 289.2 28 230.8 B3 192.0 E4 1,263 91 592.6 DA 387.1 11 287.4 94 229.7 59 191.2 F2 1,231 48 585.4 6D 384.0 08 285.7 4A 228.6 AC 190.5 F9 1,200 A4 578.3 B6 380.9 84 284.0 A5 227.5 56 189.7 FC 1,171 D2 571.4 5B 377.9 C2 282.4 52 226.4 2B 189.0 FE 1,143 E9 564.7 AD 375.0 61 280.7 A9 225.4 15 188.2 FF 1,116 74 558.2 D6 372.1 B0 279.1 54 224.3 8A — — 1,091 3A 551.7 6B 369.2 D8 — — ———— Table 10. Tone Ringer Frequency Encoding (continued) Tone Ringer Frequency Encoding Hz Hex Hz Hex Hz Hex Hz Hex Hz Hex Hz Hex SDM x 16 RCV INTRP x 4 RCV LPF x 2 SDM x 16 RCV INTRP x 4 RCV LPF x 2 1 Mbit/s 64 kS/s 16 kS/s 8 kS/s SINC3 DECM / 64 XMT BPF / 2 1 Mbit/s 16 kS/s 8 kS/s 16 FROM TO FROM DAC 16-bit DAC 16-bit ADC 16-bit LOW-PASS RC FILTER LOW-PASS RC FILTER LOW-PASS RC FILTER TO SPEAKER DRIVER TO HANDSET OUTPUT FROM AIN MUX OR SPEAKER DRIVER 2 DMAS DMAH DMAIN |
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