Kenwood FM Transceiver TK-481 Service Manual

Also see for FM Transceiver TK-481: User manual Instruction manual Specifications Instruction manual Service manual

20TK-480/481 SEMICONDUCTOR DATA Pin functionPin No. Port name I/O Function1 LSDOUT O Low speed data output.2 HSDOUT O High speed data output.3 HSDIN I Not used.4 DTMSTD I DTMF decode IC data detect input.5 SELF I Not used.6 BYTE I +5V.7 CNVSS I GND.8 SFTOE O Shift register output enable.9 LCDCS O LCD driver chip select output.10 RESET I Microcomputer reset input.11 XOUT - 9.8304MHz (System clock).12 VSS - GND.13 XIN - 9.8304MHz (System clock).14 VCC - +5V15 AUX I AUX switch input.16 AFTRD I MSK modulation data output timingpulse input.17 AFRTM I MSK demodulation data input timingpulse input.18 EN2 I Encoder pulse input 2.19 PLLCLK O PLL IC clock output.20 BEEP O Beep data output.21 AFRDT I MSK demodulation data input.22 AFREG1 O AF IC register switching data output 1.23 AFREG2 O AF IC register switching data output 2.24 EEPDAT O EEPROM data output.25 DACSTB O D/A converter IC data strobe output.26 AFCLR O MSK flame reset output.27 SAVE O Not used.28 LAMP I LAMP switch input.29 AUXTXD O External Serial interface output.30 AUXRXD I External Serial interface input.31 PLLUL I PLL unlock detect input.32 AFMSKE O MSK modulation enable (Enable active “H”).33 TXD O Serial interface output (ex. PC).34 RXD I Serial interface input (ex. PC).35 AFDAT O MSK data output.36 PTT I PTT switch input.37 RDY - Not used.38 ALE - Not used.Pin No. Port name I/O Function39 HOLD - Not used.40 HLDA - Not used.41 BLCK - Not used.42 RD - Flash memory RD bus.43 BHE - Not used.44 WR - Flash memory WR bus.45 DTMCLK O DTMF decode IC clock output.46 CNTCLK O Common clock output.47 PLLSTB O PLL IC data strobe output.48 CS0 O Flash memory chip enable.49 A19 - Not used.50~59 A18~A9 - Flash memory address bus.60 VCC - +5V61 A8 - Flash memory address bus.62 VSS - GND.63~70 A7~A0 - Flash memory address bus.71 MONI I Monitor switch input.72 EN4 I Not used.73 EN3 I Not used.74 EN1 I Encoder pulse input 1.75 MINDAT O Common data output.76 KEY2 I Key scan input 2.77 KEY1 I Key scan input 1.78 RESET O Key scan IC reset output..79~86 D7~D0 - Flash memory data bus.87 DTMDAT I DTMF decode IC data input.88 PF I PF switch input.89 VOL I Volume level input.90 BATT I Battery voltage input.91 ANLSQL I Squelch level input.92 TEMP I Not used.93 RSSI I Received signal strength indicator input(RSSI).94 AVSS - GND.95 LSDIN I Low speed data input.96 VREF - +5V97 AVCC - +5V98 SFTSTB1 O Shift register data strobe output.99 W/N O Not used.100 AFSTB O AF IC data strobe output.Microprocessor : 30622M8A-4F9GP (TX-RX Unit IC15)