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TDA7546 数据表(PDF) 41 Page - STMicroelectronics |
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TDA7546 数据表(HTML) 41 Page - STMicroelectronics |
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41 / 68 page ![]() TDA7546 Software specifications 41/68 Swallow mode: fVCO/fSYN = LSB + MSB + 32 -- -- --- - - 1 1 1 111 00 MSB = 64768 1 1 1 111 01 MSB = 65024 1 1 1 111 10 MSB = 65280 1 1 1 111 11 MSB = 65536 Table 14. Addr 2 PLL counter 2 (MSB) (continued) MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 Table 15. Addr 3,4 TV1,2 (offset refered to tuning voltage PIN 28) MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 0000 000 Tuning Voltage Offset = 0 0000 001 TVO = 25mV 0000 010 TVO = 50mV - ------ - - 1111 111 TVO = 3175mV 0-TVO 1+TVO Table 16. Addr 5 IF counter control 1 MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 00 0 tSample = 20.48ms (FM)128ms (AM ) 00 1 tSample = 10.24ms (FM)64ms (AM ) 01 0 tSample = 5.12ms (FM)32ms (AM ) 01 1 tSample = 2.56ms (FM)16ms (AM ) 10 0 tSample = 1.28ms (FM)8ms (AM ) 10 1 tSample = 640μs (FM)4ms (AM ) 11 0 tSample = 320μs (FM)2ms (AM) 11 1 tSample = 160μs (FM)1ms (AM ) 0 IF counter disable / stand by 1 IF counter enable 0 1 has to be set 0 Disable mute & AGC on hold |
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