DSP RADIO M6955 FM/TV/MW/SW/LW. aitendo. I2C DSP Radio Module M MHz 150-3,000KHz
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1 DSP RADIO M6955 FM/TV/MW/SW/LW MHz 150-3,000KHz FM AM TV2 TV1 SW AM FM LW MHz MHz MHz MHz 520-1,730KHz KHz 2-4.5V KHz/12MHz 0.5W 2 Bass Reducer 50 s/75 s LED LINE 10 A@3V PLL Phase-locked Loop AGC Automatic Gain Control Demodulating Noise Quieting Sensitivity FM LDO Low Drop Out TSSOP-24
2 TSSOP-24 oscin oscout gnd tund p_on sclk sdio inl inr vbat lout gnd gnd ldocap fmin gnd swin mwinp mwinn gnd vbat vol vref rout 1 oscin KHz 12MHz 2 oscout 3 gnd 4 tund LED 5 p_on high ON low OFF 6 sclk I2C 7 sdio I2C 8 inl LINE L 9 inr LINE R 10 vcc 11 lout L 12 gnd 13 rout R 14 vref 1.5V 15 vol vref-gnd = 1.5V 16 vcc 17 gnd 18 mwinn AM 19 mwinp AM 20 swin SW FM 21 gnd 22 fmin FM 23 ldocap LDO 24 gnd
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7 I2C control interface timing
8 multi-byte write timing multi-byte read timing step-1
9 multi-byte read timing step-2
10 1-byte write timing 1-byte read timing step-1
11 1-byte read timing step-2
12 Table 10. Reg0:configure register0 (default:0x4c) 0x00 7 power_on 0 1 -Power ON (RW) 0 -Power OFF 6 fm_en 1 1 -FM mode 0 -AM mode 5 tune 0 0->1 Trigger tune process The STC bit is set high when the tune operation is completed 4 seek 0 0->1 Trigger tune process The STC bit is set high when the tune operation is completed 3 seekup 1 Seek direction control bit 0 -Seek down 1 -Seek up 2 mute 1 1 -Mute L/R channel 0 -Normal operation 1:0 rsv 00 Debug (*1) Reg1:configure register1(default:0x10) 0x01 7:3 amband 0x2 Setting of AM band (RW) LW, KHz, 3KHz Step MW, KHz, 5KHz Step MW2, KHz, 9KHz Step NW3, 520-1,710KHz, 10KHz Step SW1, MHz, 5KHz Step SW2, MHz, 5KHz Step SW3, MHz, 5KHz Step SW4, MHz, 5KHz Step SW5, MHz, 5KHz Step SW6, MHz, 5KHz Step SW7, MHz, 5KHz Step SW8, MHz, 5KHz Step SW9, MHz, 5KHz Step SW10, MHz, 5KHz Step SW12, MHz, 5KHz Step SW13, MHz, 5KHz Step MW, , 10KHz Step, 5KHz Step other Custom configuration 2:0 fmband Setting of FM band 000 -FM1, MHz 001 -FM2, MHz 010 -FM3, 70-93MHz 011 -FM4, 76-90MHz 100 -FM5, 64-88MHz 101 -TV1, MHz 110 -TV2, MHz 111 -Custom configuration
13 Reg2:configure register2(default:0x4a) 0x02 7 rsv 0 debug*1 (RW) 6 Ref_32k_mode Crystal frequency setting KHz 0-12MHz 5 Mode3K AM mode step setting 0 1 -AM mode 3KHz Step 0 -AM mode 5KHz Step 4:0 Chan[12:8] 0x0A Upper 5bit, relation of channel number and frequency When FM mode: Freq.=25KHz*CHAN+30MHz When AM mode, 5KHz width mode: Channel Freq.=5KHz*CHAN When AM mode, 3KHz width mode: Channel Freq.=3KHz*CHAN Reg3:configure register3(default:0xc8) 0x03 7:0 Chan[7:0] 0xC8 Lower 8bit, channel number (RW) When MW2 is operated, Channel number must be send as a format of twice times of 3 Reg4:configure register4(default:0x19) 0x04 7:0 usr_chan_start 0x19 Channel number of start (RW) chan=32*usr_chan_start Reg5:configure register5(default:0x32) 0x05 7:0 usr_chan_stop 0x32 Channel number of end (RW) chan=32*usr_chan_stop Reg6:configure register6(default:0xa1) 0x06 7:2 volume 0xA0 Volume setting:0-63 (RW) <24 -Mute step,1.5dB/1-step 24 -Min bolume 63 -Max volume *Only for the status of pd_adc_vol= 1 1 line Operation mode 0 0 -Radio mode 1 -Line input mode *In order to reduce the power consumption, Please set pd_rx & pd_adc to 1 when you use line input 0 phase_inv Setting of audio output signal phase 1 0 -in-phase output,for dual speaker 1 -opposite phase, for single speaker
14 Reg7:configure register7(default:0xa1) 0x07(RW) 7 rsv 1 debug 0 -Normal operation 6 rsv 0 debug*1 5 de 1 Setting of base reduce 0-75us(USA) 1-50us(Asia) 4 bben 0 Setting of base boost 0 -Inactive 1 -Active 3 stereo 0 Setting of stereo/mono 2 mono Auto stereo,*stereo_rh 10 -Stereo x1 -Mono 1:0 bw 01 FM channel width KHz KHz 10-50KHz KHz Reg8:configure register8(default:0x58) Address(Type) BIT Label Default Function Description 0x08 7:6 fm_cnr_th 01 FM mode, threshold of CNR to (RW) determine a channel and highlight the LED 00-2dB 01-3dB 10-4dB 11-5dB 5:4 am_cnr_th 01 AM mode, threshold of CNR to determine a channel and highlight the LED MW/LW 00-6dB 01-10dB 10-14dB 11-18dB 3:2 fd_th 10 Threshold of frequency shift to determine a channel and highlight the LED FM/LW/MW 00-12K 0.2K 0.6K 01-24K 0.6K 1.2K 10-36K 1K 1.8K 11-48K 1.4K 2.4K 1:0 stereo_th 00 Threshold of CNR for starting FM stereo modulation
15 Reg9:configure register9(default:0x07) 0x09 7:4 rsv 0000 debug*1 (RW) 3 pd_adc_vol Volume control type 0 o -by resistor 1 -by I2C 2 osc_en 1 Oscillator source selection 0 -External XO 1 -Crystal 1 rsv 1 debug*1 0 lv_en 1 Lower power operation mode Reg11:configure register11(default:0xe0) 0x0B 7:6 rsv 11 debug*1 (RW) 5:4 space 10 Setting of FM seek step 00-25KHz 01-50KHz KHz KHz 3:0 rsv 0000 debug*1 Reg12:configure register12(default:0xe0) 0X0B 7 pd_adc Setting of channel ADC (RW) 0 0 -ADC enable 1 -ADC disable 6 res 0 5 pd_rx Setting of RX 0 0 -analog & RF enable 1 -anlog & RF disable 4:0 rsv 0000 debug*1 Reg13:configure register13(default:0x00) Address(Type) BIT Label Default Function Description ox0d 7 rsv 0 debug*1 (RW) 6 st_led Setting of LED indicator 0 0 -Set tund as pin to connect tunning LED 1 -FM stereo demodulation LED 5:4 rsv 00 debug*1 3:2 vol_pre 00 Setting volume of output 00-0dB dB 10-7dB dB 1:0 rsv 00 debug*1
16 Reg20:Read-only register0 0x14 7 st Current operation mode now (R) 1 -FM stereo 0 -other 6 stc Status of seek or tune processing 0 -Not complete 1 -Copmplete 5 tuned Result of tune processing 0 -No channel 1 -Catched a channel 4:0 readchan[12:8] Current channel number, upper 5bit FM mode Channel Freg=25KHz*READCHAN+30MHz AMmode, mode3k_f=0 Channel Reg=5KHz*READCHAN AMmode, mode3k_f=1 Channel Reg=3KHz*READCHAN Reg21:Read-only register1 Address(Type) BIT Label Default Function Description 0x15(R) 7:0 readchan[7:0] Current channel number,lower 8bit Reg22:Read-only register2 Address(Type) BIT Label Default Function Description 0x16(R) 7 mode3k_f Spacing of channel 1 -AM,3KHz 0 -AM, 5KHz 6:0 cnram AM mode,carrier to noise ratio,unit:db Reg23:Read-only register3 0x17(R) 7 st_dem Synthesize trust degree evaluating model 1 -When FM mode the stereo signal is more than 30% percent 6:0 cnrfm FM mode,carrier to noise ratio,unit:db CNR=Carrier to noise Reg24:Read-only register4 Address(Type) BIT Label Default Function Description 0x18(R) 7:5 pgalevel_rf PGA gain level of RF 4:2 pqalevel_if PGA gain level 1 rsv debug*1 0 lvmode Setting the max volume when lower power mode Reg25:Read-only register5 Address(Type) BIT Label Default Function Description 0x19(R) 7:6 rsv debug*1 5:0 vbat 6bit number charactor, voltage of power vcc_bat(v)= *vbat[5:0]
17 Reg26:Read-only register6 Address(Type) BIT Label Default Function Description ox1a(r) 7:0 fd_num Status of frequncy deviation Please reduce 256 when the number is larger than 127 for adjustment. The number 1 is scaled to 1KHz for FM and scaled to 100Hz for AM Reg27:Read-only register7 Address(Type) BIT Label Default Function Description 0x1B(R) 7 rsv debug*1 6:0 rssi caculating the input voltage level from RF by rssi, pgalevel_rf,and pgalevel_if FM:Pin(dBuV)=103-rssi-6*pgalevel_rf-6*pgalevel_if MW/LW:Pin(dBuV)=123-rssi-6*pgalevel_rf-6*pgalevel_if
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