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SI4844-B-DEMO Datasheet(PDF) 7 Page - Silicon Laboratories |
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SI4844-B-DEMO Datasheet(HTML) 7 Page - Silicon Laboratories |
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7 / 18 page  Si4844-B-DEMO Rev. 0.1 7 Table 1. Key Function Description Button/Mode Time Mode FM/AM/SW Radio Mode Tuner Off Tuner On POWER/BAND Hold Time <1s None Change between FM, AM, and SW (there are 2 FM bands, 2 AM bands, and 8 SW bands) Hold Time >1s Enable radio Disable radio function and enter Time mode. (Radio parameters will be saved to MCU) DE/SPC None FM mode: Change De-emphasis, between 50 µs and 75 µs. AM mode: Change channel space, between 9 kHz and 10 kHz. BASS/TMR Enter or quit time setting menu. Decrease Bass/Treble level by 1 step. TREBLE/AL Enable or disable the alarm function; enter or quit alarm setting menu. Increase Bass/Treble level by 1 step. UP/VOL+ Hold Time <1s In setting menu, change the current time/alarm parameter by one unit per each press. In radio setting menu, change the current parameter by one unit per each press. In radio working mode, increase volume 1 step per each press. Hold Time >1s In setting menu, change the current time/alarm parameter automatically. In radio setting menu, change the current parameter automatically. In radio working mode, increase volume level automatically until at maximum. DOWN/VOL– Hold Time <1s In setting menu, change the current time/alarm parameter by one unit per each press. In radio setting menu, change the current parameter by one unit per each press. In radio working mode, decrease volume 1 step per each press. Hold Time >1s In setting menu, change the current time/alarm parameter automatically. In radio setting menu, change the current parameter automatically. In radio working mode, decrease volume level automatically until at minimum. MONO/ST W/N BAND Hold Time <1s None FM/SW mode: Change band range between wideband and narrow-band. Hold Time >1s None FM mode: Change between forced mono audio and ST audio SETTING Hold Time <1s None In radio setting menu, change the current item by one step per each press Hold Time >1s None Quickly return to FM working mode. |
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