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SI4826-DEMO Datasheet, PDF (6/18 Pages) Silicon Laboratories – Si4822/26 DEMO BOARD USERS GUIDE | |||
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Si4822/26-DEMO
Control Interface:
VR1: Frequency tuning wheel
VR2: Volume control wheel
S3~S8, S10: The keypad
S2: Band slide switch for FM, AM, and SW
1 2 3 4 5 6 7 8 9 10 11 12
Band definition:
1: FM1 (87â108 MHz), De-emphasis = 75 µs
2: FM5 (64â87 MHz), De-emphasis = 75 µs
3: AM1 (520â1710 kHz), 10 kHz spacing
4: AM2 (522â1620 kHz), 9 kHz spacing
5: SW1 (5.6â6.4 MHz)
6: SW3 (6.8â7.6 MHz)
7: SW5 (9.2â10.0 MHz)
8: SW7 (11.45â12.25 MHz)
9: SW9 (13.4â14.2 MHz)
10: SW11 (15â15.9 MHz)
11: SW13 (17.1â18 MHz)
12: SW15 (21.2â 22 MHz)
Human Interface:
There are seven keys for controlling the demo board as shown below:
TREBLE/AL
BASS/TMR
DE/SPC
SETTING
DOWN/VOL-
UP/VOL+
POWER/BAND
Each key can have a different function under each operating condition:
ï®ï Time mode: Radio function is disabled. LCD displays time. Buttons can be used to set time, alarm, etc.
ï®ï FM/AM/SW Radio mode: Tuner IC works in Power Up mode. Radio function is enabled. LCD displays the
radio station parameters. Buttons are used to adjust radio settings.
The functions of the buttons are summarized in Table 1. The FM/AM/SW radio parameters that can be configured
are listed in Table 2.
6
Rev. 0.1
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