SI4708-C Datasheet, PDF (22/40 Pages) Silicon Laboratories – BROADCAST FM RADIO TUNER FOR PORTABLE APPLICATIONS

Si4708/09-C
Bit
Name
Function
6
DISABLE Powerup Disable.
Refer to “4.9. Reset, Powerup, and Powerdown”.
Default = 0.
5:1
Reserved Always write to 0.
0
ENABLE Powerup Enable.
Refer to “4.9. Reset, Powerup, and Powerdown”.
Default = 0.
Register 03h. Channel
Bit D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Name TUNE 0 0 0 0 0
CHANNEL[9:0]
Type R/W R/W R/W R/W R/W R/W
R/W
Reset value = 0x0000
Bit
15
14:10
9:0
Name
TUNE
Reserved
CHAN[9:0]
Function
Tune.
0 = Disable (default).
1 = Enable.
The tune operation begins when the TUNE bit is set high. The STC bit is set high
when the tune operation completes. The STC bit must be set low by setting the TUNE
bit low before the next tune or seek may begin.
Always write to 0.
Channel Select.
Channel value for tune operation.
If BAND 05h[7:6] = 00, then Freq (MHz) = Spacing (kHz) x Channel + 87.5 MHz.
If BAND 05h[7:6] = 01, BAND 05h[7:6] = 10, then
Freq (MHz) = Spacing (kHz) x Channel + 76 MHz.
CHAN[9:0] is not updated during a seek operation. READCHAN[9:0] provides the
current tuned channel and is updated during a seek operation and after a seek or
tune operation completes. Channel spacing is set with the bits SPACE 05h[5:4].
22
Rev. 1.2