link to page 10 RDA Microelectronics, Inc. RDA5807MP FM Tuner V1.0 REG BITS NAME FUNCTION DEFAULT 10 RDS_FIFO_CLR 1 = clear RDS fifo 1 9SOFTMUTE_ENIf 1, softmute enable 0 8AFCDAFC disable. 0 If 0, afc work;If 1, afc disabled. 7 rsvd Read as 0. 0 6 I2S_ENABLE I2S enable. 0 0 = disabled; 1 = enabled. 5:4 GPIO3[1:0] General Purpose I/O 3.when 00 gpio_sel=00or11 00 = High impedance 01 = Mono/Stereo indicator (ST) 10 = Low 11 = High 3:2 GPIO2[1:0] General Purpose I/O 2. when gpio_sel=10 00 00 = High impedance 01 = Interrupt (INT) 10 = Low 11 = High 1:0 GPIO1[1:0] General Purpose I/O 1. when gpio_sel=01 00 00 = High impedance 01 = Reserved 10 = Low 11 = High 05H15INT _MODEIf 0, generate 5ms interrupt; 1 If 1, interrupt last until read reg0CH actionoccurs.14:13Seek_modeDefault value is 00; When = 10, will add the 00RSSI seek mode.12RSVD11:8SEEKTH[3:0]2Seek SNR threshold value10007:6LNA_PORT_SEL[1:0]LNA input port selection bit:1000: no input01: LNAN10: LNAP11: dual port input5:4LNA_ICSEL_BIT[1:0]Lna working current bit:0000=1.8mA01=2.1mA10=2.5mA11=3.0mA3:0VOLUME[3:0]DAC Gain Control Bits (Volume).10110000=min; 1111=max 2 The default noise threshold is 71dB 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 21 Document Outline General Description Features Applications Table of Contents Functional Description FM Receiver Synthesizer Power Supply RESET and Control Interface select Control Interface Electrical Characteristics Receiver Characteristics Serial Interface I2C Interface Timing Register Definition Pins Description Application Diagram Audio Loading Resistance Larger than 32Ω & Reference Clock Application: Bill of Materials: Audio Loading Resistance Larger than 32Ω & DCXO Application: Bill of Materials: Physical Dimension PCB Land Pattern Change List Contact Information