AVR230 harman/kardon
O.S.D IC (74763M)
Pin Functions (IC51)
Pin No.SymbolFunctionDescription
1VSSGroundGround connection
2XtalIN1Connection for the crystal and capacitor used to form the crystal oscillator that generates
Crystal oscillator connection
the internal synchronization signal. The oscillator can be selected with a command switch.
3XtalOUT1
Horizontal synchronization Outputs the horizontal synchronization signal (AFC). The output polarity can be selected
4HSYNCOUToutput(metal option). Also functions as general output port (command switch).
5XtalIN2Connection for the crystal and capacitor used to form the crystal oscillator that generates
Crystal oscillator connection
6XtalOUT2the internal synchronization signal.
Outputs the vertical synchronization signal. The output polarity can be selected (metal
7VSYNCOUTVertical synchronization output
option). Also functions as general output port (command switch).
Enables/disables serial data input. Serial data is enabled when this pin is low (hysteresis
8CSEnable input
input). Pull-up resistor built in (metal option).
9SINData inputSerial data input (hysteresis input). Pull-up resistor built in (metal option).
10SCLKClock inputClock input for serial data input (hysteresis input). Pull-up resistor built in (metal option).
During input, switches between SECAM and other modes.
SECAM mode switch input/
11SECAMDuring output, functions as general output port or internal V output (command switch).
output (command switch)
Low = other modes, high = SECAM mode
During input, switches between 525 scan lines and 625 scan lines.
525/625 switch input/output
12525/625During output, functions as general output port or character data output (command switch).
(command switch)
Low = 525 lines, high = 625 lines
Switches the color mode between NTSC and PAL.
NTSC/PAL switch input/output
13NTSC/PALDuring output, functions as general output port or frame data output (command switch).
(command switch)
Low = NTSC, high = PAL
Switch FSC between 3.58 MHz and 4.43 MHz.
143.58/4.43 3.58/4.43 switch input/outputDuring output, functions as general output port or halftone output (command switch).
(command switch)Low = 3.58, high = 4.43
System reset input pin, low is active (hysteresis input).
15RSTReset input
Pull-up resistor built in (metal option).
16CVOUTVideo signal outputComposite video output
17VDD2Power supply connectionPower supply connection for composite video signal level generation
18CVINVideo signal inputComposite video input
19CVCRVideo signal inputSECAM chroma signal input
20SYNCINSync separator circuit inputBuilt-in sync separator circuit video signal input
21SEPCSync separator circuit Built-in sync separator circuit
22VSSGroundGround connection
23PDOUTControl voltage outputAFC control voltage output
24AMPIN
AFC filter connectionFilter connection
25AMPOUT
26FCControl voltage inputAFC control voltage input
27VCOIN
LC oscillator connection VCO LC oscillator circuit coil and capacitor connection
28VCOOUT
Outputs the exclusive NOR of the horizontal synchronization signal (AFC) and CSYNC (sync
External synchronization signal
29SYNCDETseparator). The output polarity can be selected (metal option). Also functions as general
detection output
output port (command switch).
30VDD1Power supply connectionPower supply connection (+5 V: digital system power supply)
No. 5039-3/19
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ACEC
