SI4844-B-DEMO Datasheet, PDF (6/18 Pages) Silicon Laboratories – Si4844-B DEMO BOARD USERS GUIDE

Si4844-B-DEMO
Control Interface:
VR1: Frequency tuning wheel
VR2: Volume control wheel
S3~S10: The keypad for human interface
S2: Band switch for FM, AM, and SW
1 2 3 4 5 6 7 8 9 10 11 12
Band definition for the slide switch is as follows:
1: FM1 (W 64–108 MHz) (N 87–108 MHz), ST indication = 6 dB separation@20 dBµV
2: FM5 (W 76–108 MHz) (N 64–87 MHz), ST indication = 6 dB separation@20 dBµV
3: AM1 (520–1710 kHz), 10 kHz spacing
4: AM2 (522–1620 kHz), 9 kHz spacing
5: SW1 (W 3.2–7.6 MHz) (N 5.6– 6.4 MHz)
6: SW3 (W 3.2–10.0 MHz) (N 6.8–7.6 MHz)
7: SW5 (W 5.9–18.0 MHz) (N 9.2–10.0 MHz)
8: SW7 (W 7.0–16.0 MHz) (N 11.45–12.25 MHz)
9: SW9 (W 7.0–23.0 MHz) (N 13.4–14.2 MHz)
10: SW11 (W 9.0–22.0 MHz) (N 15–15.9 MHz)
11: SW13 (W 9.5–18.0 MHz) (N 17.1–18 MHz)
12: SW15 (W 10.0–22.0 MHz) (N 21.2–22 MHz)
Note: N = Narrow-band, W = Wideband
Human Interface:
There are 8 keys for controlling the demo board as shown below.
TREBLE/AL
BASS/TMR
DE/SPC
POWER/BAND
SETTING
MONO/ST
W/N BAND
DOWN/VOL-
UP/VOL+
Each key can have a different function under each operating condition:
Time Mode: Radio function is disabled. LCD displays time. Buttons can be used to set time, alarm, etc.
FM/AM/SW Radio Mode: Tuner IC works in powerup 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 below in Table 2.
6
Rev. 0.1