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System Control
The CTC210/211 uses a single Thomson ST9 family micro controller (microprocessor). It is a 56-pin SDIP package using a 16-bit processor with 8 D/A (Digital to Analog) converter ports individually addressable for different functions. Communications with connected devices utilize the IIC (Inter Integrated Circuit) protocol. An integrated OSD (On-Screen Display) peripheral function allows a display of up to 15 lines, 34 characters long, using 8 colors, 4 font sizes. The microprocessor decodes closedcaptioned information when available using the OSD to display it. Programming information is stored outboard from the microprocessor in a 4KiloBit (512Kbyte) EEPROM (U13102) that contains all system control functions, some chassis alignments, status registers to store customer settings and current operating conditions. The System Control microprocessor IC, U13101, is responsible for monitoring and controlling virtually all functions of the chassis. U13101 receives all operator inputs from the front panel keyboard or the remote control hand unit and interprets them for the control of different chassis functions via U13203. System control also generates channel-tuning data; picture control (tint, color, etc.) signals and provides the "Power On" command. The microprocessor is always "alive" unless the AC is disconnected or the set is placed in "serviceman" (requiring Chipper CheckTM control) mode. Key pin outs are: Front Panel inputs 6, 48, 49, and 50 Clock and Data 43 and 44 OSC 40 and 42 Reset 51 IR input 36 On/Off 4 Power Fail 5 +12V run sense 38 +5V 16 and 29 Ground 30

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