Kenwood TS-950S Service Manual

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TS-950S/SDSEMICONDUCTOR DATA+ Terminal functionPin name Pin No. 11/0 FunctionPower supplytVee 30 l — | Supply voltage (+5V NOM)Vss 10 ‘ - | Ground.1 ClockX2/CLKIN 8 ' + | Internal clock crystal input pin (X2). This terminal is also used as an external clock input pin (CLKIN}.x1 7 * O | Internal clock crystal output pin.CLKOUT 6 O | Clock output signal. The CLKOUT signal frequency is 1/4 of the external clock input or internal clock crystalHl frequency. The duty ratio is 50%.a. i ControlWE 31 © | TMS32010 indicates that data on the data bus is valid during active low. Goes active in the first cycle only| of an OUT command and the second cycle of a TBLW command. When the WE signal is active, the MEN22ns and DEN signals are high at all timesDEN 32 © | TMS32010 indicates that data is received from the data bus during active low. Goes active in the first cycleparen only of an IN command. The MEN and WE signals are high at all times. |MEN 33 © | Goes active except when the WE and DEN signals are active during active low. This is a control signal usedto fetch commands from on-chip and off-chip program memory.2F Interrupt _ iRS 4 i} Reset. When the RS pin is made low for five clock cycles (minimum) during active low, the DEN, WE, andMEN signals go high and data fines 015 through DO take on a high impedance. The PC and address lines| A11 through AO are simultaneously cleared on clock cycie after the trailing edge of the RS signal, and all| address lines go low. The interrupt mask and interrupt flag register are cleared, but the overflow mode| register, data pointer, and auxiliary register pointer are not altered. The device is in reset mode until thisah signal goes high.INi 5 | interrupt, An interrupt signal is generated on the trailing edge of the iNT signal. This edge is used to latchpean the interrupt flag register (INTF) until a device interrupt occurs. The interrupt is also possible when low.BIO 9 | input/output branch control. This branches to the address designated using commands when the BIOsignal is active (low) during BIOZ command execution.ae Program memory controlMC/MP 3 | Microcomputer/microprocessor mode. When MC/MP = 1, the microcomputer mode is in effect and thereis a 1524-word on-chip program memory. Address 1523 through 1535 are used for testing. A 2560-wordprogram memory can be installed externally in this mode. When MC/MP = 0, microprocessor mode is ineffect and all program memory is installed externally.Bidirectional data bus Ora015~D8 18~11 VO | Data tines D15 (MSB} through DO {LSB} always take on a high impedance except when the WE signal isD7~DO 19~26 VO | active (low).Program memory address bus and port address busAl1~AQ | -27~29 © | Program memory address lines A11 (MSB) through AO (LSB) and port address lines PA2 (MSB) throughA8~A3 i 34~39 O | PAO (LSB). Lines A11 through AO do not take on a high impedance. Lines A2 through AQ indicate portA2/PA2 j 40 Q | address PA2 through PAO during IN/OUT command execution.Al1/PA1 1 aAO/PAO2(e)FOR SERVICEMANUALSCONTACT:MAURITRONTECHNICALSERVICESwww.mauritron.co.ukTEL:01844-351694FAX:01844-352554A/D gate array interface : TC74HC74AF (DSP unit IC 14}« Logic circuit diagram - Truth table{PR INPUTS OUTPUTS | FUNCTION1CK CLR} PR| Oo |CK/ Q/]a1D LEH |X |x] tyH CLEAR4CLR H[L]X [TX PRIL PRESET2PR cfulx [x] -2cK HI H]L|f] it] a ze20 H] HH} HUA] RL -aa Qn | NO CHANGE2cLA H[H}] xX] tLjan|a@X : Do not care93