Kenwood TS-990S Service Manual

Also see for SP-990: Instruction manual

Contents

TS-990S68SEMICONDUCTOR DATAPin No. Name I/O Function21 SDSCS O SRX-DSP chip selectL: Enable22 NC O No connection23 MDRET O Communication request to TXMRX-DSP24 SDRET O Communication request to SRX-DSP25 BEEP O Beep pattern instructionH: Beep output26 MVOX I VOX transmit (MIC) signal inputH: Active27 SWST1 I SRX-DSP programming status signalinput28 AVOX I VOX transmit (ANI) signal inputH: Active29 NC O No connection30 TXC I TX ON/OFFH: TX ON31 CKY I RF power ON/OFFH: Power ON32 MABK1 I AF blanking signal input for TXMRX-DSPH: Mute33 SABK1 I AF blanking signal input for SRX-DSPH: Mute34 MABK2 I AF blanking signal input for TXMRX-DSPH: Mute35 SABK2 I AF blanking signal input for SRX-DSPH: Mute36 MIBK I IF blanking signal input for TXMRX-DSPH: Mute37 SIBK I IF blanking signal input for SRX-DSPH: Mute38 MDREQ I Communication request form TXMRX-DSP39 SDREQ I Communication request form SRX-DSP40 NC O No connection41 BKC I Reduced voltage detect interruptHL: Interrupt42 DFRRG I Compulsion fi rmware programmingMode detect43 DRXD I Serial data input from main MPU44 DTXD O Serial data output for main MPU45 DCTS I RTS signal input from main MPU46 DRTS O RTS signal output to main MPU47 MCTDET ICTCSS detection signal input formTXMRX-DSPH: CTCSS detection48 SCTDET ICTCSS detection signal input form SRX-DSPH: CTCSS detection49 AN0 O No connection50 AN1 O No connection51 NC O No connectionPin No. Name I/O Function52 ANISEL O ACC2 audio/ USB audio selectH:USB audio/ L: ACC2 audio53 MODSEL O Modulation selectH: FM modulation/ L: TIF54 SMUTE2 O Audio mute control for Ext.SP255 SMUTE 1 O Audio mute control for SP1/Ext.SP156 PMUTE O Audio mute control for phone circuite57 SP2DET I Ext.SP2 detection58 MDBT OBoot confi guration select for TXMRX-DSPH: FLASH boot/ L: SPI slave boot59 SDBT O Boot confi guration select for SRX-DSPH: FLASH boot/ L: SPI slave boot60 PHDET I Phone detection61 VOLEN O Load enable for DAC (IC658)62 VOLDT O Data output for DAC (IC658)63 VOLCK O Clock output for DAC (IC658)64 NC O No connectionTXMRX-DSP: (DSP unit IC202)Pin No. Name I/O Function1 VDDINT I Internal (core) supply voltage (1.2V)2 CLK_CFG0 I Core to CLKIN raito control (GND con-nect)3 CLK_CFG1 I Core to CLKIN raito control (GND con-nect)4 BOOT_CFG0 I Boot confi guration select (GND connect)5 MDBT I Boot confi guration selectH: FLASH boot/ L: SPI slave boot6 GND - GND7 VDDEXT I External (I/O) supply voltage (3.3V)8 GND - GND9 VDDINT I Internal (core) supply voltage (1.2V)10 GND - GND11 VDDINT I Internal (core) supply voltage (1.2V)12 GND - GND13 VDDINT I Internal (core) supply voltage (1.2V)14 GND - GND15 MDRET I Communication request from DSP-subMCU16 MDREQ O Communication request to DSP-subMCU17 AD7 I/O Address/Data bus for fl ash memory18 GND - GND19 VDDINT I Internal (core) supply voltage (1.2V)20 GND - GND21 VDDEXT I External (I/O) supply voltage (3.3V)