Kenwood TS-990S Service Manual
Also see for SP-990: Instruction manual
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TS-990S67SEMICONDUCTOR DATAPin No. Name I/O Function10 GND - GND11 LE I Latch enable12 DC18SW OSwitch signal for digital 1.8V DC/DCconverterH: Active13 D4 I Data bit 414 D5 I Data bit 515 33SW1 O Switch signal for digital 3.3V FETH: Active16 33SW2 O Switch signal for digital 3.3V FETH: Active17 D6 I Data bit 618 D7 I Data bit 719 REFO O Reference output selectH: Reference output20 VCC - 3.3VExtension Port IC: TC74VHC373FT(Control unit IC42)Pin No. Name I/O Function1 OE I Output enable2 SDEN1 O DDS1 enable for sub local unit3 D0 I Data bit 04 D1 I Data bit 15 SDIO O DDS1 I/O_update for sub local unit6 SDEN2 O DDS2 enable for sub local unit7 D2 I Data bit 28 D3 I Data bit 39 SDEN3 O DDS3 enable for sub local unit10 GND - GND11 LE I Latch enable12 SPEN1 O PLL1 enable for sub local unit13 D4 I Data bit 414 D5 I Data bit 515 SPEN2 O PLL2 enable for sub local unit16 SPEN3 O PLL3 enable for sub local unit17 D6 I Data bit 618 D7 I Data bit 719 SLSEN O Sub local shift register enable20 VCC - 3.3VExtension Port IC: TC74VHC373FT(Control unit IC43)Pin No. Name I/O Function1 OE I Output enable2 NC O No connectionPin No. Name I/O Function3 D0 I Data bit 04 D1 I Data bit 15 NC O No connection6 NC O No connection7 D2 I Data bit 28 D3 I Data bit 39 NC O No connection10 GND - GND11 LE I Latch enable12 NC O No connection13 D4 I Data bit 414 D5 I Data bit 515 NC O No connection16 NC O No connection17 D6 I Data bit 618 D7 I Data bit 719 NC O No connection20 VCC - 3.3VDSP-Sub MCU: F2136ACNFKEVA(DSP unit IC101)Pin No. Name I/O Function1 NC O No connection2 VREF I A/D standard voltage input3 DMODE I Flash programming mode signal4 NC O No connection5 MDHLT I TXMRX-DSP check signal input6 DRESET I For resetL: Reset7 XOUT O System clock output (18.432MHz)8 VSS - GND9 XIN I System clock input (18.432MHz)10 VCC I Power supply input (3.3V)11 SDHLT I SRX-DSP check signal input12 NC O No connection13 MDRES O TXMRX-DSP resetL: Reset14 SDRES O SRX-DSP resetL: Reset15 NC O No connection16 DSOUT O DSP data output (SPI)17 DCLK O DSP dlock output (SPI)18 DSIN I DSP data input (SPI)19 NC O No connection20 MDSCS O TXMRX-DSP chip selectL: Enable |
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