SI4731-DEMO Silicon Laboratories Inc, SI4731-DEMO Datasheet - Page 7

• Manufacturer Part Number: SI4731-DEMO
• Description: BOARD DEMO SI4731 RADIO RECEIVER
• Manufacturer: Silicon Laboratories Inc
• Type: Receiverr

Specifications of SI4731-DEMO

• Frequency: 520kHz ~ 1.71MHz, 64MHz ~ 108MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: SI4731
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

5. Human interface
There are 12 keys for controlling the demo board as shown in Figure 7:
Each key can have a different function under each operating condition:
The functions of the buttons are summarized in Table 1:
Note: Combination keying is entered and exited from Radio Mode by pressing and holding the SET key then pressing the
DOWN
UP/
Button/Mode
Calendar/Powerdown Mode: Radio function is disabled. LCD displays Calendar. Buttons can be used to set
time, etc.
Radio AM/FM Mode: Tuner IC works in powerup mode (FM or AM). Radio function is enabled. LCD displays
the radio station parameters. Buttons are used to adjust radio settings.
Digital Input Mode: Tuner IC works in powerup mode (FM or AM). Radio function is enabled. LCD displays the
radio station parameters. The buttons are used for direct digit input of station frequencies.
MEM/AL/1
POWER
MSCAN
BANDS
BANDS key. A combination of the SET and the MSCAN keys will cycle through the available display items.
SET
Time <
0.5 s <
0.5 s
Time
< 3 s
Time
> 3 s
Hold
Hold
Hold
Fast parameter setting
calendar item by one
Enter calendar setup
change the current
MEM/AL/1
MSCAN/5
Calendar Mode
In setup menu,
Enable radio
SET/9
Tuner Off
menu
None
None
None
step.
Table 1. Key Function Description
Figure 7. Human Interface Keys
VOL+/2
VOL-/6
BANDS/0
AM Mode: Used to automatically detect and set the channel spacing.
FM Mode: Used to adjust calendar using received RDS CT.
In setup menu, change the current parameter by one step.
Scan for all valid stations and save them to presets.
Rev. 0.1
Disable radio function and enter calendar mode.
In radio mode, tune up or down by one step.
(Radio parameters will be saved to Flash).
FUNC/DIGIT
M+/3
M-/7
Change between FM and AM band.
(Parameter list in Table 2)
Enter radio setup menu.
Perform a station seek.
Fast parameter setting.
Radio AM/FM Mode
Tuner On
POWER
DOWN/8
UP/4
Si4731-DEMO
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