Datasheet

RDA Microelectronics, Inc. RDA5807M FM Tuner V1.1
The information contained herein is the exclusive property of RDA and shall not be distributed, reproduced, or disclosed in whole or in
part without prior written permission of RDA.
Page 10 of 22
REG BITS NAME FUNCTION DEFAULT
14:12 RSVD Reserved
000
11:8 SEEKTH[3:0]
2
Seek SNR threshold value
1000
5:4 RSVD
Resvered
00
3:0 VOLUME[3:0]
DAC Gain Control Bits (Volume).
0000=min; 1111=max
Volume scale is logarithmic
When 0000, output mute and output
impedance is very large
1111
06H 15 RSVD
reserved
0
14:13 OPEN_MODE[1:0]
Open reserved register mode.
11=open behind registers writing function
others: only open behind registers reading
function
00
07H 15 RSVD Reserved 0
14:10 TH_SOFRBLEND[5:0] Threshold for noise soft blend setting, unit 2dB 10000
9 65M_50M MODE Valid when band[1:0] = 2’b11 (0x03H_bit<3:2>)
1 = 65~76 MHz;
0 = 50~76 MHz.
1
8 RSVD Reserved 0
7:2 SEEK_TH_OLD
3
Seek threshold for old seek mode, Valid when
Seek_Mode=001
000000
1 SOFTBLEND_EN If 1, Softblend enable 1
0 FREQ_MODE If 1, then freq setting changed.
Freq = 76000(or 87000) kHz + freq_direct (08H)
kHz.
0
0AH 15 RDSR RDS ready
0 = No RDS/RBDS group ready(default)
1 = New RDS/RBDS group ready
0
14 STC Seek/Tune Complete.
0 = Not complete
1 = Complete
The seek/tune complete flag is set when the
seek or tune operation completes.
0
13 SF
Seek Fail.
0 = Seek successful; 1 = Seek failure
The seek fail flag is set when the seek
operation fails to find a channel with an RSSI
level greater than SEEKTH[5:0].
0
12 RDSS RDS Synchronization
0 = RDS decoder not synchronized(default)
1 = RDS decoder synchronized
Available only in RDS Verbose mode
0
11 BLK_E When RDS enable: 0
2
This value is SNR threshold for seeking, and the default value 1000 is about 32dB SNR.
3
0x20H_bit<14:12>, Seek_Mode register. Default value is 000; When = 001, will add the 5802E seek mode.