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AN332 Datasheet(PDF) 46 Page - Silicon Laboratories |
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AN332 Datasheet(HTML) 46 Page - Silicon Laboratories |
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46 / 302 page  AN332 46 Rev. 1.0 Property 0x2301. TX_ASQ_LEVEL_LOW This property sets the low audio level threshold relative to 0 dBFS in 1 dB increments, which is used to trigger the IALL bit. This threshold can be set to detect a silence condition in the input audio allowing the host to take an appropriate action such as disabling the RF carrier or powering down the chip. The CTS bit (and optional interrupt) is set when it is safe to send the next command. This property may only be set or read when in powerup mode. The default is 0x0000 and the range is 0 to –70. Available in: All Default: 0x0000 Units: 1 dB Step: 1 dB Range: –70 to 0 Property 0x2302. TX_ASQ_DURATION_LOW This property is used to determine the duration (in 1 ms increments) that the input signal must be below the TX_ASQ_LEVEL_LOW threshold in order for an IALL condition to be generated. The range is 0 ms to 65535 ms, and the default is 0 ms. Note that the TX_ASQ_DURATION_LOW and TX_ASQ_DURATION_HIGH counters start and the TX_ASQ_STATUS command will only return valid data after a call to TX_TUNE_FREQ, TX_TUNE_POWER, or TX_TUNE_MEASURE. The CTS bit (and optional interrupt) is set when it is safe to send the next command. This property may only be set or read when in powerup mode. Available in: All Default: 0x0000 Units: 1 ms Step: 1 ms Range: 0–65535 Bit D15 D14 D13 D12 D11 D10 D9D8 D7D6 D5D4 D3D2 D1D0 Name 00 00 00 0 0 IALLTH[7:0] Bit Name Function 15:8 Reserved Always write to 0. 7:0 IALLTH[7:0] Input Audio Level Low Threshold . Threshold which input audio level must be below in order to detect a low audio condition. Specified in units of dBFS in 1 dB steps (–70 .. 0). Default is 0. Bit D15 D14 D13 D12 D11 D10 D9D8 D7D6 D5D4 D3D2 D1D0 Name IALLDUR[15:0] Bit Name Function 15:0 IALLDUR[15:0] Input Audio Level Duration Low. Required duration the input audio level must fall below IALLTH to trigger an IALL inter- rupt. Specified in 1mS increments (0–65535 ms). Default is 0. |
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