Si4822/26-DEMO

6

Rev. 0.1

Control Interface:

VR1: Frequency tuning wheel

VR2: Volume control wheel

S3~S8, S10: The keypad

S2: Band slide switch for FM, AM, and SW

Band definition:

1: FM1 (87–108 MHz), De-emphasis = 75 µs

2: FM5 (64–87 MHz), De-emphasis = 75 µs

3: AM1 (520–1710 kHz), 10 kHz spacing

4: AM2 (522–1620 kHz), 9 kHz spacing

5: SW1 (5.6–6.4 MHz)

6: SW3 (6.8–7.6 MHz)

7: SW5 (9.2–10.0 MHz)

8: SW7 (11.45–12.25 MHz)

9: SW9 (13.4–14.2 MHz)

10: SW11 (15–15.9 MHz)

11: SW13 (17.1–18 MHz)

12: SW15 (21.2– 22 MHz)

Human Interface:

There are seven keys for controlling the demo board as shown below:

Each key can have a different function under each operating condition:

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.

3

2

1

45

6

78

9

11

10

12

TREBLE/AL

BASS/TMR

DE/SPC

SETTING

DOWN/VOL-

UP/VOL+

POWER/BAND