Kenwood TKR-850 Service Manual

Also see for TKR-850: Brochure & specs Function reference Instruction manual Instruction manual Programming reference

24TKR-850 Pin FunctionPin No. Name I/O Function1~5 IO5~IO1 I/O Aux I/O No.5~No.1 (Acc D-sub 25 pin)6 BYTE – 5V7 CNVss – GND8 ENT O TX PLL IC enable9 ENR O RX PLL IC enable10 Reset I Microcomputer reset input11 Xout – 14.7456MHz12 Vss – GND13 Xin – 14.7456MHz14 Vcc – 5V15 NMI – Not used16 BUP I Backup battery detectH : Backup, L : Main17 TEMP I Temperature detect for fan actionH : Temp high, L : Temp low18 EPTT I Acc PTT (Acc D-sub 25 pin)H : Off, L : On19 CLK O Common clock20 DAT O Common data21 SFT O Beat shift H : On, L : Off22 LD1 O Control D/A converter LD23 STB3 O Control shift register STB24 LD2 O TX/RX D/A converter LD25 STB4 O TX/RX shift register STB26 RS O DSP reset H : Off, L : On27 SC O Squelch control (Acc D-sub 25 pin)H : Inactive, L : Active28 PTT I Mic PTT H : Off, L : On29 TXD1 O Mic TXD30 RXD1 I Mic HOOK/RXD31 SCLK O EEPROM clock32 SDAT I/O EEPROM data33 TXD0 O Acc TXD (Acc D-sub 25 pin)34 RXD0 I Acc RXD (Acc D-sub 25 pin)35 CP O PLL IC clock36 DP O PLL IC data37 RDY I CPU ready input38 ALE – Not used39 HOLD – Not usedPin No. Name I/O Function40 HLDA – Not used41 BCLK O Not used42 RD O Flash ROM WR/DSP HDS143 BHE – Not used44 WR O Flash ROM WR/DSP HDS245 STB2 O Control shift register STB46 INTx O DSP interrupt H : Off, L : On47 HCS O DSP HCS48 CS0 O Flash ROM CS49 A19 O Not used50~59 A18~A9 O Flash ROM address bus60 Vcc – 5V61 A8 O Flash ROM address bus62 Vss – GND63~70 A7~A0 O Flash ROM address bus71 EMON I Acc monitor (Acc D-sub 25 pin)H : Off, L : On72 LDR I RX VCO lock detectH : Lock, L : Unlock73 LDT I TX VCO lock detectH : Lock, L : Unlock74,75 KEY5,KEY4 O Key matrix output76~78 KEY3~KEY1 I Key matrix input79~86 D7~D0 I/O Flash ROM data bus87 FWD I RF power down level input88 RSSI I RSSI level input89 ASQ I Squelch level input90 VLI I Volume level input91 BATT I Power supply voltage level input92 AI1 I Aux input No.1 (Acc D-sub 25 pin)93 AI2 I Aux input No.2 (Acc D-sub 25 pin)94 AVss – GND95 AI3 I Aux input No.3 (Acc D-sub 25 pin)96 Vref – 5V97 AVcc – 5V98 STB1 O Display shift register STB99 SOE O Shift register common OE100 IO6 I/O Aux I/O No.6 (Acc D-sub 25 pin)Main CPU : 30622M4-113GP (TX-RX unit IC604)SEMICONDUCTOR DATA