SI4708-C Datasheet, PDF (21/40 Pages) Silicon Laboratories – BROADCAST FM RADIO TUNER FOR PORTABLE APPLICATIONS

Si4708/09-C
Register 02h. Power Configuration
Bit D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Name ^{DSMUTE DMUTE MONO 0 RDSM SKMODE SEEKUP SEEK 0 DISABLE 0 0 0 0 0 ENABLE}
Type ^R/W
R/W R/W R/W R/W R/W
R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
Reset value = 0x0000
Bit
Name
Function
15
DSMUTE Softmute Disable.
0 = Softmute enable (default).
1 = Softmute disable.
14
DMUTE
Mute Disable.
0 = Mute enable (default).
1 = Mute disable.
13
MONO
Mono Select.
0 = Stereo (default).
1 = Force mono.
12
Reserved Reserved.
Always write to 0.
11
RDSM
RDS Mode (Si4709 only).
0 = Standard (default).
1 = Verbose.
Refer to “4.4. RDS/RBDS Processor and Functionality”.
10
SKMODE Seek Mode.
0 = Wrap at the upper or lower band limit and continue seeking (default).
1 = Stop seeking at the upper or lower band limit.
9
SEEKUP Seek Direction.
0 = Seek down (default).
1 = Seek up.
8
SEEK
Seek.
0 = Disable (default).
1 = Enable.
Notes:
1. Seek begins at the current channel, and goes in the direction specified with the SEEKUP
bit. Seek operation stops when a channel is qualified as valid according to the seek
parameters, the entire band has been searched (SKMODE = 0), or the upper or lower
band limit has been reached (SKMODE = 1).
2. The STC bit is set high when the seek operation completes and/or the SF/BL bit is set
high if the seek operation was unable to find a channel qualified as valid according to the
seek parameters. The STC and SF/BL bits must be set low by setting the SEEK bit low
before the next seek or tune may begin.
3. Seek performance for 50 kHz channel spacing varies according to RCLK tolerance.
Silicon Laboratories recommends ±50 ppm RCLK crystal tolerance for 50 kHz seek
performance.
4. A seek operation may be aborted by setting SEEK = 0.
7
Reserved Always write to 0.
Rev. 1.2
21