Kenwood TS-950S Service Manual

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TS-950S/SDSEMICONDUCTOR DATAA/D converter : MB4056 (Digital unit 1C13)+ Terminal connection20] vec190° Vaee OUT18 RS17 FJ Data Out16) ADC CLK18 ECS14E 3 co13(EFC11271 c21175 s/6¢ Terminal function- Block diagramMulti-plexerAGND OGND VREF OUT vecPin No.| Pin name Name Function2-3 AQ~-A7 Analog input Eight channel analog input terminals. One channel is selected using channel assign-ment input terminals CO through C2.1 S/D Conversion mode select input | Selects the A/D conversion mode. When 0, the high and low ranges are converted.When 1, either the high or the low range is converted.This signal is latched on the trailing edge of the CS signal.12~14| C2~CO Channel assignment input Assigns an analog input channel for analog-to-digital conversion.These signals are latched on the trailing edge of the cs signal.16 cS Chip select input Chip select input terminal. When the CS signal is set to 1 then 0, analog-to-digitalconversion starts and the data output enters the enable state. When analog-to-digital conversion is completed or interrupted, the CS signal is set to 1.16 ADC CLK | A/D conversion clock input AVD conversion clock input terminal. The conversion speed is determined by theclock frequency. The clock frequency need not be constant.17 Data Out | Data output This is a terminal {open collector} to output the results of analog-to-digital conversion.Output data is synchronized with the ADC CLK signal in the order of start bit, MSB,288 through LSB, and stop bit.18 RS Range select input Selects the analog input voltage range. When 0, the Vrs = 1.25V range is selectedWhen 1, the Vrs = 5V range is selected. AThis signal is latched on the trailing edge of the CS signal.19 Vref OUT | Reference voltage output This is a terminal (regulator output) to output a reference voltage. When the powersupply is used at a voltage of 8 to 18V, a regulated 5V voltage is output to theVrer OUT terminal. A maximum of 10mA current can be supplied by this terminal.1 A.Gnd Analog ground Ground terminat.10 D.Gnd Digital ground20 Vec Power terminalFOR SERVICE MANUALS+ Range selection « Channel selection CONTACT:S/D | RS | 1st conversion | 2nd conversion c2 c1 Co | Channel selected MAURITRON TECHNICAL SERVICES1 0 L H 0 0 0 AO www.mauritron.co.ukbj H L o fo] i Al TEL’ 01844 - 351694iia ae c 7 of ij A2 FAX: 01844 - 3525541 q H 7 ie) 4 1 A31 400 0 Ad1 i) 1 AS1 1 Q AGB1 1 1 A7