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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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LC74799 Fiches technique(PDF) 3 Page - Sanyo Semicon Device |
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LC74799 Fiches technique(HTML) 3 Page - Sanyo Semicon Device |
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3 / 32 page  No. 5834-3/32 LC74799, 74799M Pin Descriptions Pin No. Pin name Function Notes Ground Ground connection (digital system ground) 1 VSS1 Crystal oscillator (MUTE input) These pins are used either to connect the crystal and capacitors used to form an external crystal oscillator circuit to generate the internal synchronizing signals, or to input an external clock signal (2fsc or 4fsc). As a mask option, the XtalOUT pin can be set to function as the MUTE input pin. When this pin is set low, the video output is held at the pedestal level. (A pull-up resistor is built in and the input has hysteresis characteristics.) Crystal oscillator input switching (CHABLK output) Switches the mode between external clock input and crystal oscillator operation. A low level selects crystal oscillator operation and a high level selects external clock input. As a mask option, the CTRL1 input pin can be set to function as the CHABLK (character · frame) output. This is a 3-value output. 2 XtalIN 3 XtalOUT (MUTE) 4 CTRL1 (CHABLK) This pin must be left open. 5NC Clock input Input for the PDC/VPS data output clock. I2C bus 6 SCL Data output PDC/VPS data output. I2C bus write address: [01111100] I2C bus read address: [01111101] 7 SDA External synchronizing signal judgment output Outputs the state of the external synchronizing signal presence/absence judgment. Outputs a high level when synchronizing signals are present. Outputs the crystal oscillator clock when CS1 and RST are low. (This signal is not output on command resets.) 8 SYNCJDG Enable input 1 Enable input for the OSD serial data input. Serial data input is enabled when this pin is low. A pull-up resistor is built in and the input has hysteresis characteristics. 9 CS1 Clock input 1 Serial data input enable pin. A pull-up resistor is built in and the input has hysteresis characteristics. 10 SCLK1 Data input 1 Serial data input. A pull-up resistor is built in and the input has hysteresis characteristics. 11 SIN1 Power supply Composite video signal level adjustment power supply (analog system power supply) 12 VDD2 Charge pump output Charge pump output. Connect a low-pass filter to this pin. 13 CPOUT Oscillator control voltage input VCO oscillator control voltage input. (For data slicing) 14 VCOIN Ground Ground (VCO ground) 15 VSS3 Oscillator range adjustment VCO oscillator range adjustment resistor connection 16 VCOR Oscillator control voltage input 2 VCO oscillator control voltage input. For character display. 17 VCOIN2 Power supply (+5 V) Power supply (+5 V: VCO power supply) 18 VDD3 Video signal output Composite video signal output 19 CVOUT Ground Ground (analog system ground) 20 VSS2 Video signal input Composite video signal input 21 CVIN Video signal input SECAM chrominance signal input 22 CVCR Power supply (+5 V) Power supply (+5 V: digital system power supply) 23 VDD1 Sync separator circuit input Video signal input to the internal sync separator circuit 24 SYNIN Sync separator circuit adjustment Internal sync separator circuit adjustment 25 SEPC Composite synchronizing signal output Internal sync separator circuit composite synchronizing signal output. Can be switched to function as a signal (high, low, or ST. pulse) output by the MOD0 setting when SEL0 is high. 26 SEPOUT Vertical synchronizing signal input Inputs the vertical synchronizing signal created by integrating the SEPOUT pin output signal. An integration circuit must be connected between this pin and the SEPOUT pin. This pin must be tied to VDD1 if unused. This pin is valid when CTL3 is set high. 27 SEPIN Background color phase adjustment Background color phase adjustment resistor connection 28 CDLR Reset input System reset input. A pull-up resistor is built in and the input has hysteresis characteristics. 29 RST Power supply (+5 V) Power supply (+5 V: digital system power supply) 30 VDD1 Note *: A capacitor of at least 2000 pF must be connected between the VDD1 power supply and VSS1. |
Numéro de pièce similaire - LC74799 |
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Description similaire - LC74799 |
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