Kenwood TK-380 Service Manual

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Contents

TK-38024SEMICONDUCTOR DATAD/A Converter : M62364FP (TX-RX Unit IC8)■ Block diagram1 VI1 I D/A converter input.2,3 VO1,VO2 O 8-bit resolution D/A.4 VI2 I D/A Converter input.5 V DD - Power supply.6 LD I When the LD is at the low level, the clockinput reception mode is entered. and datacan be uptaken by the 12-bit shift register.Then at the threshold rising from low tohigh, the 12-bit shift register value is loadedto the D/A output register.7 CLK I Shift clock input. With the rise of the shiftclock, the input signal from the DI is inputto the 12-bit shift register.8 Dl I Serial data input. Input serial data 12 bits long.9 VI3 I D/A converter input.Pin No. Pin code I/O Function■ Pin function10,11 VO3,VO4 O 8-bit resolution D/A.12,13 VI4,VI5 I D/A converter input.14,15 VO5,VO6 O 8-bit resolution D/A.16 VI6 I D/A converter input.17 DO O 12-bit shift register MSB bit data is output.18 V REF - T e r m i n a l f o r d e t e r m i n i n g t h e D / AConversion reference point level.Vo = (VIN - VDAref) x n/256 + VDAref19 reset - When a low level signal is input to thereset terminal, all the D/A output registervalue become low.20 GND - GND.21 VI7 I D/A converter input.22,23 VO7,VO8 O 8-bit resolution D/A.24 VI8 I D/A converter input.Pin No. Pin code I/O Function