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SI4827-DEMO Arkusz danych(PDF) 10 Page - Silicon Laboratories |
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SI4827-DEMO Arkusz danych(HTML) 10 Page - Silicon Laboratories |
10 / 16 page Si4827-DEMO 10 Rev. 0.1 4.2.1. MCU Setting Band Property The DEMO board enables the band property to be set by the MCU. The band property includes: Band top Band bottom De-emphasis (only for FM) Channel Space (only for AM) The setting menu is illustrated in Figure 4. To set the band properties, follow these steps: 1. Press the SETTING button to enter the setting menu and select the item to be set. The selected item flashes for 1 second, then automatically switches to its current value. 2. While the value is flashing, press the DOWN/VOL- or UP/VOL+ button to set the desired value within 3 seconds. 3. Repeat step 1 and 2 to finish setting the band properties. 4. When the Band properties are set, the MCU automatically quits setting the menu if there is no operation within 3 seconds. 5. In FM working mode, press the DE/SPC button to set the De-emphasis 50 µs or 75 µs. 6. In AM working mode, press the DE/SPC button to set the Channel Space 9 kHz or 10 kHz. Figure 4. Setting Menu 4.2.2. MCU Setting Radio Working Mode The host MCU can set the radio working mode The working modes include: Tone/volume mode, item 3 in setting menu Tuning preference (only for FM and SW), item 4 in setting menu To set radio working mode, follow these procedures: 1. Press the SETTING button to enter item 3. The LCD displays the item number st3 for 1 second, then automatically switches to its mode indication. 2. Press the DOWN/VOL- or UP/VOL+ button to select the desired mode within 3 seconds. 3. Repeat steps 1 and 2 to set the tuning preference by setting the item 4. 4. When the radio working mode is set, the MCU automatically quits setting the menu if there is no operation within 3 seconds. 6(77,1* 0(18 %DQG 7RS %DQG %RWWRP 7RQH9RO 02'( 7XQLQJ SUHIHUHQFH D SUHIHUHQFH E SUHIHUHQFH D %DVV7UHEOH 02'( E 'LJ9RO 02'( F 0,; 02'( G 0,; 02'( |
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