Circuit Description.RECEIVER The signal from the antenna is passed through atransmission/reception selector circuit and is amplified by T7. The signal after amplified enter to 86 for processing then output the audio, the audio signal is amplified by UTC8 and output by the speaker at last. Figure. RECEIVER CIRCUIT.TRANSMITTER The signal from the microphone passes through 86, after modulation in the carrier modulation, the modulationsignalwith thecarrierpromotesbybuffert T Tandamplifiedby Tthen sends to the antenna terminals. ANI Figure.TRANSMITTER CIRCUIT
.TRANSMISSION/RECEPTION SELECTOR CIRCUIT The transmission output is passed through the transmission/reception selector circuit and low-pass filter to the antenna. The transmission/reception selector circuit, which consists of diodes D6, D60, D6 and D6, is turned on during transmission and off during reception to switch the signal..digital CONTROL CIRCUIT SIDE KEY AND EODER CIRCUIT The signal from side key and encoder is directly input to the processor. Reset and backup circuit When turn on the power,apositive pulse is output from the reset circuit consisting of U8 D8 and R8to the 6feed of reset terminal on U8 microprocessor.when turn off the power,mcu detects a. Vdrop, and output alow signal, it outputs data to U898 and enter backup mode. Figure,digital control circuit BATTERY VOLTAGE TEST CIRCUIT Power supply voltage after partial pressure input to the microprocessor analog interface BATTERY SAVE CIRCUIT The squelch is off during receive. The power circuit enters battery save mode if no key has been pressed for five seconds. The circuit is controlled by microprocessor directly.
.86 DESCRIPTION MAINLY SECTION DESCRIPTION.DSP consists of IF amplifier,fm modulation, RSSI calculator,afc control circuit, audio/audio mixer filter,ctcss/dcs filter and so on..synthesizer mainly functions: The synthesizer produces alocaloscillator signal, used to switchthe RF input toacontinuouslow medium frequency. Synthesizer provides the base clock to adjust the VCO frequency..base CLOCK 86 ports more base clocks, for example,.8 MHz,MHz and so on..serial CONTROL INTERFACE Athree lines serial control interface is used to read the main IC and 86 control record. Serial control is characters in length, 8 bit numeric string and 6bit address string.
6 7 8 9 0 A B C D E F 0 9 8 7 6 F E D C B A ENT K K K T7 DTCEE R7 0R R7 0R D7 DIO- D7 DIO- D0 D D K K K K LCD_CS C7 00P C7 00P C7 00P C7 00P C70 00P C70 00P C70 00P C70 BATT_i 6 7 8 9 0 8 7 6 JP7 JP8 MIC+ SP A/B VFO/MR ENT D0 D R7 R7.7K C7 C7 0uF L7 0T MIC76 MIC SP76 SP C76 0P SP- CS RD WR DATA VSS OSCO 6 OSCI 7 VLCD 8 VDD 9 IRQ 0 BZ BZ COM0 COM COM COM 6 S 7 S0 8 S9 9 S8 0 S7 S6 S S S S 6 S 7 S0 8 S9 9 S8 0 S7 S6 S S S S 6 S 7 S0 8 S9 9 S8 0 S7 S6 S S S 6 S 7 S0 8 S U7 HT6 Com Com Com Com Seg Seg 6 Seg 7 Seg 8 Seg 9 Seg6 0 Seg7 Seg8 Seg9 Seg0 Seg Seg 6 Seg 7 Seg 8 Seg 9 Seg6 0 Seg7 Seg8 Seg9 Seg0 Seg Seg 6 Seg 7 Seg 8 Seg 9 Seg6 0 Seg7 Seg8 Seg9 Seg0 Seg Seg 6 JP7 LCD R79 0R D79 DIO- R70 K R7 K R77 K LAMP D C7 00P R7 K MONI ALARM 侧键 ALARM
F E D C B A R89 70R C89 SW86 SW JP86 6 7 8 9 0 6 7 8 JP8 JK R88 K8 C88 7P/0V JK8 ST-0-06 ST- SW88 SW88 SW88 R8 70R T8 DTCEE() C89 R80 M U8 RQ7A C878 00P C876 PTT C8 * C8 * CALL MONI C88 C8 * C88 R8 K T8 L8 00R(A.PB) R8 7K DTCEE() C8 0P R86 K7 R8 K C9 C88 R9 K R86 T8 SK8 R87 R877 R86 K7 T R96 00K C9 K7 C8 * R8 00R 00R K R86 7K R868 7K.768KHz R86 7K R867 7K R9 K T9 SB6 T9 DTCEE R97 0K R8 7K R866 7K CH CH CR8.768K(0PPM) Xtal Xtal 6 7 8 9 R9 7K R9 K7 C9 R86 7K S Q 7 0 6 0 6 0 U8 FCMCU 6 8 9 0 9 C86 P C9 TXD X i X o 8 7 9 8 7 CS-8 AF_MUTE TOE-8870 PDN-86 P-FM DA-E CK-CH ANI-D P_AMP D0/CK_FM/DA-CH KIN_ R90 K R90 C P R K7 C9 7P C R6 00K R K7 R K7 C R7 00K C L C C7 9P R 00K C 00P R 7K C 00R(A.PB) R K7 C7 0P R M R K R 0K C 0P C6 00P C R6 0K 6 R 00K R 00K 6 8 8 CR Xtal.686M UA LM8 LM8 Xtal 7 C 06P/0V 9 0 X in R6 K 9 8 R7 0K 7 6 C 00P R K R6 7K C 06P/0V R 00K C 6 R7 K C6 C 8 R8 K C6 * 8 7 R6 6 00K R 8K 0 U CMX8E R9 K VDD St/GT ESt StD Q Q Q Q U6 IN+ IN- GS VRef INH PWDN 6 OSC 7 OSC 8 TOE VSS MT8870DS C 9 T6 SK8(B) C69 R67 0P Xtal Xtal 6 CR68 0P 7K R6 90K.79M C898 R K RV 0K R 7K A0 Vcc 8 A 6 A CK GND DA U898 C 7 C D89 ISS7 R898 0K R899 0K R R R R R R6 CR VCC XOUT VC GND C8 C86 7P 6.0M R86 K7 C890 00P C 0P C6 * C8 C87 7P K K K R89 K6 C89 K 0K * C * C7 0R C6 0R R6 0P R8 K C6 C89 00R R89 0K R8 0K C8 7P T89 MRF97 C8 C89 R9 K C9 7P R6 * 6 7 8 C6 * AVDD SCLK SDIO AVDD XTAL XTAL MODE SENB U RDA86 R69 K7 T69 MRF97 8 0 9 U9 QLX8-M SCK 6 SDA OSCI VDD GND 9 0 6 6 7 8 9 0 Cc 7 R9 0R C PABIAS AVDD 0 9 C 06P/0V R6 0R C6 0P R67 0R R66 * C9 0P R68 * T T0 DTCEE() C C C68 C66 * C0 L 00R(A.PB) R96 6K8 C9 06P/0V R9 K7 9 R0 K C9 C9 R0 7K 6 7 8 C9 0P C0 AVDD GND R OUT L OUT GND DVDD VIO 9 8 7 9 0 C90 K7 C0 L R 0R T.768KHz RF GND LNAN GND U9 RDA80N R CR9 * Xtal R C 0R R Xtal GND GND C C C6 0R R8 0R R9 K9 C 0 C86 0P L7 90NH L8 00NH T SC6 R 0R L86 00NH(CH) T8 SC6 R8 0R C P C7 0P C8 7P C8 0P R 0R R C8 68P C7 0P C R C8 P L8 00NH(CH) L8 7NH(CH) C8 R7 7K L 0R C C8 P C6 R8 00K R6 7R C6 L 0T L 0.*.*T T 078 R 0K T SC6 R 0R C D8 HSC77 C 0P C C 0P C 7P R 0K R 0R D7 * C C 0P C P C L 00R(A.PB) C D6 * T SA6 C 0P R K C66 7P T DTCEE C R 7K L 7NH C6 R6 R66 R 7K R 7R T DTCEE() C 6P 6K K L6 8T(0) T RQA0009 T66 L 0T DTCEE L NH C67 C uf R6 L 0.*.*T C C D C HSC77 P O VCC O C C6 IN- 8 IN+ 7 IN+ 6 GND IN- U UTC8 C K C C7 C0 C8 C D HSC77 E6 C6 uf C60 R K C 7P R8 K T8 SK8 R87 0K C C8 0P C8 R8 0R R7 0R C7 C 6P 7 (T.Y.) R8 M E 0uF R9 0R C9 C6 6 R86 K R7 0R R8 7K R8 80K C7 R77 0K R8 0K C8 R9 70R C9 68P C8 C76 0P R60 70R D60 HVC D6 HVC C7 00P R7 0K E9 0UF/6V C9 8 R7 0K R7 0K U9 RHRZCA-T-F out in C9 C7 R7 0K R7 0K T7 DTCEE L6 0.*.*6T C7 E9 0UF/6V C6 0P L6 0.*.*T C6 P C907 L90 C66 P C6 0P 00R(A.PB) RD80S C906 C68 P L66 L68 0.*.*6T 0.*.*6T R0 0. R0 0. R06 0. C67 P C69 6P R6 0R SW6A RD80S BA90 BATTERY L69 0K ANT60 ANT- F E D C B A D8 LED(G) D8 LED(R) C8 0P R8 00K R8 0K D8 * R86 00K C86 0P R87 0K L O W P G R E E N C T X D S T D - 8 8 7 0 / I N T - 8 6 C D S L A M P L C D _ C S K I N _ K I N _ K I N _ D / D A - 8 D A - 8 6 / R D A - 8 / S D A - F M P T T / R X D V O X R I N G / A N I A P C D / C K - 8 6 R E S E T D / C K - E / C K - 8 R6 K R 0K C TOE-8870 ANI-D P-FM VOX CDS D/CK-86 DA-86 RING/ANI PDN-86 SQ STD-8870/INT-86 R 00K R K UB C8 R9 K9 ANI-D TOE-8870 STD-8870/INT-86 C9 L6 60NH(CI) R6 7K D0/CK_FM/DA-CH D/CK-E/CK-8 D/DA-8 D/CK-86 APC R66 0K C68 C6 P-FM CDS D/CK-86 DA-86 PDN-86 SQ STD-8870/INT-86 C C8 0P C9 C * GPIO0/CSS_IO AFOUT GPIO/CODE_IO GPIO/INT GPIO/SDO GPIO/RXON 8 MIC_IN AVDD GPIO/TXON GPIO6/SQ 6 GPIO7/VOX RFIN AVDD PDN AVDD 7 RFOUT 8 C0 0P T0 SB6(BV) T R6 K T TX_P C60 L60 0NH T TX_P C6 P C6 BATT_i C8 VDD GND Out LCD_CS VDD 8 CS-8 WP 7 OUT 7 C8 D/DA-8 D/CK-E/CK-8 XTAL 6 R8 R897 R9 C9 DATA-8 GND 00K K K R9 LNAP AF_MUTE K R9 C9 C87 SDA-FM K7 P MIC+ C96 DA-E DA-E D/CK-E/CK-8 D/CK-E/CK-8 R96 R9 CK-CH CK-CH C9 7K 00K D0/CK_FM/DA-CH D0/CK_FM/DA-CH D/CK-E/CK-8 D/DA-8 P_AMP P_AMP P_AMP P_AMP SP- SP- SP- SP- SP+ SP+ SP+ SP+ APC APC APC D/CK-86 AF AF AF BATT_i BATT_i BATT_i BATT_i LCD_CS KIN_ KIN_ KIN_ KIN_ D/CK-86 D/DA-8 D/CK-E/CK-8 D0/CK_FM/DA-CH LAMP MIC SP SP- LAMP BATT_i SP- SP+ MIC+ C86 7P R9 00K C87 C86 7P C8 P GND GND R88 7K PTT/RXD T SK8(B) R9 00K C6 9P MICN MICFB MICP MOD AVDD 7 DVss L 00R(A.PB) C9 AUXADC X out VBIAS C R * DISCIN 0 DVDD DISCIN CSN R 00K DISCFB CDATA AUDIO SCLK AVSS RDATA AuxDAC IRQN DVSS SYSCLK CLKSEL 7 VDEC RxENA TxNEA C C9 00P T SK8(B) R7 00K C8 * R8 K AF R89 M C8 C8 7P C89 R8 K7 R8 K7 R8 K7 C89 R89 R87 K C88 R6 K7 AF C6 R6 K7 MIC_MUTE MIC_MUTE C 0P T6 * C 0P P-FM T9 DTAYE GPIO GPIO GPIO RCLK SDIO 0 SCLK SEN RST GND L9 68NH(CH) C9 C7 L 70R R6 0R C7 0P C T DTAYE E R6 70K L 9NH uf/0v T67 C C 8P SK88 C8 0P T8 DTAYE AF_i SP- SP+ APC AF BATT_i E80.7uF U70B LM90V C80 C90 T BATT C7 U70A LM90V T J BATT* C90 BATT AF AF_i BATT_i Gnd C90 06P/0V TX_P BATT C90 R70 0K BATT BATT C90 0P
Block Diagram A B C D ENTER D7 D7 D78 D79 D77 T7 DTCEE JK87 JK87 T6 KTC08 PTT CALL MONI ALARM U UTC8 T SA6 T DTCEE BATT_i D8 LED(R) D8 LED(G) T8 DTCEE T8 DTCEE BATT_i T9 DTCEE T9 DTAYE D89 KDS T89 MRF97 T SW86A RQ7A U8 C U898 T87 SK8 SWA HT6 U7 LCD JP7 BA90 U9 HT7 BATT_i BATT.768KNz CR8 CR 6MHz RV T SC6 T SC6 T SK078 T SK07 T7 DTAYE T0 SB6 T0 DTCEE T8 DTAYE T8 SK8 T7 DTCEE BATT T SK8 T T T BATT_i MPU U8 RDA86 U D60D6 HVC HSC77 D6D6 LPF LM90V U70 P_TX APC R0 R0 R06 R87 R8 C86 R86 ANT SMP68-UHF U6 HT97 U RDA80E T SC6 T66 SC6 P_RX VOX_DET MICo MIC+ MICIN EX_PTT PTT P6[] CALL MONI RXD TXD P_AMP XIN XOUT TONE MUTE RXIN AU_TX AVDD DVDD PA[] PA[] RESETB G_LED R_LED BATDET DTMF_STD DTMF_TOE RDA_CSS IN/OUT RDA_CODE_IO RDA_SCLK RDA_SDIO RDA_SEN RDA_PDN RDA_INT RDA_SQ LCD_CS K K K K D0 D D D LAMP P_RX P_TX APC ROM_CLK ROM_DATA MIC_IN AFOUT RFIN RFOUT XTAL AVDD RDA_SDIO FM_CLK MENU VFO/MR
MODEL speficition qty B0M () position number capacitance 00P C00 8 C70 C70 C70 C7 C7 C7 C7 C7 0P C00 C76 C00 C7 C00 C70 0uF C080 C7 resistance K R00 R7 R77 R70 R7.7K R00 R7 0R R00 R7 R7 R79 induction 0T L060 L7 diode DIO- D060 D7 D7 DIO- LED-8 D79 DTCEET-ESM-DTCEE audion T7 integration HT6 U-CHIP8-W U7 other LCD LCD-GD-600W JP7 JP8 JP-8- JP7 MIC MIC60 MIC76 A/B S-ANT S70 ENT S-ANT S7 VFO/MR S-ANT S7 SP SP0 SP76 MONI S-SKHLLBA00 S7 ALARM S-SKRT S7
BOM MODEL speficition qty position number capacitance P C00 C C P C00 C7 P C00 C8 0P C00 7 C86 C7 C C8 C6 C C9 P C00 C86 C8 P C00 C 8P C00 C 0P C00 C69 C68 C P C00 C 9P C00 C7 C6 7P C00 C9 C8 C8 P C00 C87 C8 68P C00 C8 00P C00 7 C890 C9 C C C6 C878 C7 0P C00 7 C R6 C8 C9 C7 C C86 C7 C0 C C76 C8 C8 C7 C C8 C C00 C6 C C C C C C8 C6 C67 C0 C9 C898 C9 C C C7 C90 C8 C C C7 C89 C87 C C00 C88 C C C89 C96 C9 C9 C8 C8 C8 C8 C68 C6 C6 C C9 C9 C9 C9 C7 C8 C9 C876 C C0 C9 C89 C C8 C C C C89 C89 C6 C9 C C90 C8 C8 C C8 R89 0P C00 C8 06P/0V C00 C90 P C00 C 7P C00 C9 C00 C88 C88 C88 C906 C907 C0 C C C9 C C C89 C9 C9 C7 C80 C C C C C C C6 C60 7P C00 C86 C86 C87 C86 C8 7P C00 C 7P C00 C66 P C060 C69 P C060 C66 P C060 C6 C6 P C060 C68 P C060 C67 P C060 C7 6P C060 C6 0P C060 C ()
P C060 C6 P C060 C C0 00P C060 C9 R 0P C060 C90 C060 C6 uf C080 C E 06P/0V C080 C C C9 C C080 C90 7P/0V C080 C88 E80 uf EIA6 E6 0UF/6V EIA6(A) E9 E9 0uF E-060 E resistance 0R R00 9 R67 R6 C6 R6 C7 R C6 C R K R00 0 R9 R R90 R8 R9 R R8 R9 R8 R7 R9 R8 R877 R R897 R R6 R9 R R6 K R00 R R6 K8 R00 R88 K R00 R0 R9 R8 C K R00 R K9 R00 R9 R9 K7 R00 8 R R86 R86 R86 R8 R8 R8 R6 R6 R R9 R9 C90 R86 R R R9 R69 K R00 R87 K6 R00 R89 6K8 R00 R96 8K R00 R 0K R00 R R87 R8 R6 R898 R899 R7 R97 R R77 R87 R R8 0R R00 R6 R7 R8 R9 R K R00 R8 R 7K R00 R67 R K R00 R66 R R R86 7K R00 9 R86 R86 R8 R6 R6 R96 R0 R8 R9 R8 R7 R R R868 R867 R866 R86 R88 R 7R R00 R6 R 6K R00 R6 00K R00 6 R7 R R R R9 R7 R R9 R8 R86 R6 R R9 R96 R8 R 00R R00 R87 R8 C89 0K R00 7 R R70 R7 R7 R7 R7 R7 80K R00 R8 00K R00 R8 0K R00 R89 R8 R66
70R R00 R9 R60 00K R00 R6 0K R00 R 0R R00 R8 R8 90K R00 R6 70K R00 R6 70R R00 R89 R8 R 0R R00 R9 M R00 R R89 R8 R80 0R R060 L L 0K R06 L69 0. R06 R0 R0 R06 0K RV-* RV induction NH L060 L 0NH(CH) L060 L L NH L060 L8 NH(CH) L060 L9 7NH(CH) L060 L8 00NH(CH) L060 L86 L8 0NH L060 L60 90NH L060 L7 60NH(CI) L060 L6 00R(A.PB) L060 L L L L8 00R(A.PB) L080 L L90 L L 0.*.0*T T L6 0.*.*T T L6 0.*.0*T T L66 L68 0.*.*8T 8T L6 0.*.*T T L 0.*.*T T R7 diode LED(G) D060 D8 LED(R) D060 D8 HSC77 D-ESC D8 D D HVC D-ESC D6 D60 ISS7 D-USM(D) D89 audion RQA0009 T-NA-SK76 T DTAYE T-ESM(C) T9 T T8 DTCEE() T-ESM(C) 8 T8 T8 T0 T T9 T7 T T66 SK8(B) T-ESM(G) T6 T T T8 T8 SK88 T-SOT89-SK88 T67 078 T-SOT89-SK078 T SB6(BV) T-TSM(C) T0 T9 SA6 T-TSM-SB6 T SC6 T-TSM-SC6(R) T RQ7A T-US-RQX U8 SC6 T-USM(C) T8 T MRF97 T-USM(C) T69 T89 integration RDA80N U-QFN-00-P00 U9
RDA86 U-QFN(RDA86) U FCMCU U-QFP U8 MT8870DS U-SOIC8 U6 C U-SOP8 U898 LM8 U-SOP8 U QLX8-M U-SOP8 U9 UTC8 U-SOP8 U RHRZCA-T-F U-SOT89(V) U9 CMX8E U-SSOP8(T) U LM90V U-SSOP8 U70 other.79m FX-.8*. CR68.686M FX-.8*. CR 6.0M FX-.0*.0 CR.768K(0PPM) FX-8*.8 CR8 BATTERY JK-C BC-7S--D BA90 ST- JK-ST-06 JK8 ST-0-06 JK-ST-0-06 JK JP8 JP-8- JP86 ANT- PX--ANT ANT60 RD80S S-R087FENS SW6 SW S-RD8-T0 SW86 PTT S-SKRT- SW88 CALL S-SS08GS6 SW88 MONI S-SS08GS6 SW88
Pin NO Pin name I/O PORT NAME FUN DES Pin NO Pin name I/O PORT NAME function XOUT oscillator output XIN oscillator input DVDD power positive P6{0} LAMP backlight control 6 P6{} LCD CS LCD driver 7 DGND 6 P6{} 8 MICBiasOUT 7 P6{} RDA CIDE IO 86data input/output 9 MICO power negative mic power output MIC amplify output 8 P6{} 0 MICIP MIC+input 9 P6{} RXD 0 P6{6} RDA_CSS IN/OUT P6{7} TXD programme data receive 86data input/output send programme data MICIN MIC-input IntverfOUT MIC power RXO P7{0} K key scan input RXIN P7{} K key scan input AGND P7{} K key scan input 6 PLLC RX audio amplify output RX audio amplify input power negative external capacitance P7{} K key scan input 7 TONE TONE ring output 6 P7{} D key scan input 8 AVDD power positive 7 P7{} D key scan input 9 P9{} G_LED grenn indicator light 8 P7{6} D key scan input 0 P9{6} R_LED red indicator light 9 P7{7} D0 modulation key scan P9{7} AU-TX audio output output 0 P8{0} EX _PTT external PTT key PA{0} AF-OUT P8{} PTT PTT key PA{} P8{} CALL call key DA APC P8{} MONI monitor key PA{} P8{} P_AMP P8{} P_URX CPU PIN FUTION LIST audio amplifier power input control RX power control 6 PA{} RX audio output auto power control encoder input encoder input 7 PA{} RDA_SCLK 86 clock
6 P8{6} ROM_CLK memory clock 8 PA{} RDA_SDIO 86 data 7 P8{7} ROM_DATA memory data 9 PA{6} RDA_SEN 86data control 8 P9{0} MUTE mute 60 PA{7} RDA_PDN 86data control 9 P9{} P_TX TX power control 6 AD VOX_DET VOX testing 0 P9{} 6 AD BATDET battery testing P9{} 6 AD RDA_SQ squelch control P9{} RDA INT 86data control 6 RESETB reset
SPECIFICATION Frequency Range 00-70MHz Channel Number 6 Channel Step Antenna Impedance Microphone Impedance work voltage Frequency Stability.KHz 0Ω KΩ 7.V DC ±. 0-6 ppm Transmitter carrier output power modulation sensitivity W 8-mV Modulation Distortion % Modulation Limited Adjacent Channel Power Intermodulatohn Rejection KHz 6dB 0dB RECEIVER Sensitivity 0.uV Audio Distortion % SN RATE -0 Co-Channel Rejection Blocking Adjacent Channel Selectivity Spurious Radiation -8dB 8dB db db