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STV82X6 データシート(PDF) 46 Page - STMicroelectronics |
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STV82X6 データシート(HTML) 46 Page - STMicroelectronics |
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46 / 95 page  Register List STV82x6 46/95 CRF1 Channel 1 Baseband PLL Demodulator Offset CETH1 Channel 1 FM/AM Carrier Level Threshold SQTH1 Channel 1 FM Squelch Threshold Register Address (hex): 1Fh Type: R Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 CRF1[7:0] Bit Name Reset Function CRF1[7:0] 00000000 Channel 1 Carrier Recovery Frequency Displays the instantaneous frequency offset of the Channel 1 Baseband PLL Demodulator. Address (hex): 20h Type: R/W Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 CETH1[7:0] Bit Name Reset Function CETH1[7:0] 00100000 This register is used to compare the carrier level in the channel and the threshold value. This level is measured after the channel filter and is relative to the full scale reference level (0 dB). This is used as part of the validation of an FM signal, if the carrier level is below the threshold, the signal is considered to be non-valid. CETH Threshold (dB) CETH Threshold (dB) FFh -6 10h -32 80h -12 08h -38 40h -18 00h OFF (all carrier levels are accepted) 20h -24 (Default Address (hex): 21h Type: R/W Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 SQTH1[7:0] |
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