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LC74785 Datasheet PDF

Sanyo Semicon Device
Part Number LC74785
Manufacturer Sanyo Semicon Device
Title On-Screen Display Controller LSI
Description Ordering number : EN5520A CMOS LSI LC74785, LC74785M On-Screen Display Controller LSI Overview The LC74785 and LC74785M are on-chip EDS CMOS LS...
Features
• Display format: 24 characters by 12 rows (Up to 288 characters)
• Character format: 12 (horizontal) × 18 (vertical) dots
• Character sizes: Three sizes each in the horizontal and vertical directions
• Characters in font: 128
• Initial display positions: 64 horizontal positions and 64 vertical posi...

File Size 268.19KB
Datasheet PDF File LC74785 PDF File


LC74785 LC74785 LC74785




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LC74723 : 8 SYNCJDG External synchronization signal judgment output 9 10 11 12 13 14 15 16 17 18 19 CS SCLK SIN VDD2 CVOUT NC CVIN VDD1 SYNIN SEPC SEPOUT Enable input Clock input Data input Power supply Video signal output Sync separator circuit bias voltage Built-in sync separator circuit bias voltage monitor Composite synchronization signal output Outputs the built-in sync separator circuit's composite synchronization signal. (Outputs the SYNIN input signal when the built-in sync separator circuit is not used.) Inputs the vertical synchronization signal by integrating the output signal from the SEPOUT pin. An integration circuit must be connected between the SEPOUT pin and this pin. Hold at V.

LC74723M : 8 SYNCJDG External synchronization signal judgment output 9 10 11 12 13 14 15 16 17 18 19 CS SCLK SIN VDD2 CVOUT NC CVIN VDD1 SYNIN SEPC SEPOUT Enable input Clock input Data input Power supply Video signal output Sync separator circuit bias voltage Built-in sync separator circuit bias voltage monitor Composite synchronization signal output Outputs the built-in sync separator circuit's composite synchronization signal. (Outputs the SYNIN input signal when the built-in sync separator circuit is not used.) Inputs the vertical synchronization signal by integrating the output signal from the SEPOUT pin. An integration circuit must be connected between the SEPOUT pin and this pin. Hold at V.

LC74725 : Ground connection (digital system ground) Connections for the external crystal and capacitors used to form a crystal oscillator for internal synchronizing signal generation. Alternatively, these pins can be used for external clock input (2fsc or 4fsc). Switches between external clock input mode and crystal oscillator mode. Low: crystal oscillator mode, high: external clock input mode. Line 21H pulse output (MOD0 = low: even field, MOD0 = high: both fields output) Connections for the external coil and capacitor used to form the character output dot clock generation oscillator. Outputs the judgment as to where there are or are not external synchronizing signals present. Outputs a high level wh.

LC74725M : Ground connection (digital system ground) Connections for the external crystal and capacitors used to form a crystal oscillator for internal synchronizing signal generation. Alternatively, these pins can be used for external clock input (2fsc or 4fsc). Switches between external clock input mode and crystal oscillator mode. Low: crystal oscillator mode, high: external clock input mode. Line 21H pulse output (MOD0 = low: even field, MOD0 = high: both fields output) Connections for the external coil and capacitor used to form the character output dot clock generation oscillator. Outputs the judgment as to where there are or are not external synchronizing signals present. Outputs a high level wh.

LC7472M : .

LC74730M : 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 CS SCLK SIN VDD2 COUT NC CIN CBIAS YOUT NC YIN CTRL2 CVOUT NC CVIN CTRL3 SYNIN SEPC SEPOUT SEPIN RST VDD1 28 29 30 No. 4247-3/14 LC74730M Block Diagram No. 4247-4/14 LC74730M Serial Data Input Timing Display Control Commands The display control commands have an 8-bit serial input format. Commands consist of a first byte, which includes the command identification code, and data in the second and following bytes. The LC74730M supports the following commands: x COMMAND 0: Display memory (VRAM) write address setup command y COMMAND 1: Display character data write command z COMMAND 2: Vertical display start position and vertical size.

LC74731W : Switches the crystal oscillator Selects external clock input mode or crystal oscillator mode. Low: crystal oscillator mode, high: input external clock input mode. LC oscillator connections Connections for the coil and capacitor that form the character output dot clock generation oscillator. 7 MUTE Muting control input 8 CDLR Background color phase adjustment 9 SYNCJDG /Rout Outputs the result of the judgment as to whether or not the external sync signal is present. External sync signal judgment A high level is output when a sync signal is present. output (Rout output) The dot clock (LC oscillator) is output when RST is low. (The IC can be set up to not output this signal during res.

LC74731W : 1 VSS1 Ground Ground connection. (Digital system ground) 2 3 Xtalin Xtalout Crystal oscillator connections Connections for the crystal element and capacitors that form the internal sync signal generating crystal oscillator. Xtalin can also be used to input an external clock signal. (2fsc or 4fsc) Switches the crystal oscillator Selects external clock input mode or crystal oscillator mode. Low: crystal oscillator mode, high: 4 CTRL1 input external clock input mode. 5 OSCin LC oscillator connections Connections for the coil and capacitor that form the character output dot clock generation oscillator. 6 OSCout 7 MUTE Muting control input This is an active-low input with hystere.

LC74732W : Switches the crystal oscillator Selects external clock input mode or crystal oscillator mode. Low: crystal oscillator mode, high: input external clock input mode. LC oscillator connections Connections for the coil and capacitor that form the character output dot clock generation oscillator. 7 MUTE Muting control input 8 CDLR Background color phase adjustment 9 SYNCJDG /Rout Outputs the result of the judgment as to whether or not the external sync signal is present. External sync signal judgment A high level is output when a sync signal is present. output (Rout output) The dot clock (LC oscillator) is output when RST is low. (The IC can be set up to not output this signal during res.

LC74732W : 1 VSS1 Ground Ground connection. (Digital system ground) 2 3 Xtalin Xtalout Crystal oscillator connections Connections for the crystal element and capacitors that form the internal sync signal generating crystal oscillator. Xtalin can also be used to input an external clock signal. (2fsc or 4fsc) Switches the crystal oscillator Selects external clock input mode or crystal oscillator mode. Low: crystal oscillator mode, high: 4 CTRL1 input external clock input mode. 5 OSCin LC oscillator connections Connections for the coil and capacitor that form the character output dot clock generation oscillator. 6 OSCout 7 MUTE Muting control input This is an active-low input with hystere.

LC74735NW : Connect a ground to this pin. (Digital system ground) Connect to the character output dot clock generator oscillator coil and capacitor. May also be used for external clock input. Switches between external clock input mode and LC oscillator mode. Low: LC oscillator, high: external clock input MORE+ Clock input for the serial data input system MORE+ (This input has hysteresis characteristics.) Serial data input MORE+ (This input has hysteresis characteristics.) Enable input for the serial data input system. Serial data input is enabled when this pin is set low. MORE+ (This input has hysteresis characteristics.) Digital system power supply: +3.3 V Vertical sync signal input MORE+ (This input h.




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