LC74785/M
Overview
The LC74785 and LC74785M are integrated EDS
LC74789/M/JM
Overview
The LC74789, LC74789M, and LC74789JM are
Functions
Display structure: 12 lines 24 characters (up to 288 characters)
Character structure: 12 18 dots (H V)
Character sizes: Three sizes in each of the horizontal and vertical directions
Number of characters: 128 characters
Display start positions: Horizontal: 64 positions, vertical: 64 positions
Blinking: Specified in horizontal units
Types of blinking: Two: periods of 1.0 and 0.5 seconds
Blinking of the whole character area (12 18 dots)
Background color: 8 colors (internal synchronization operation) at 4 fsc 6 colors (internal synchronization operation) at 2 fsc
Line background color: Can be set for up to 3 lines
Line background color: 8 colors (internal synchronization operation) at 4 fsc
Line background color: 6 colors (internal synchronization operation) at 2 fsc 
External control input:
EDS support
Video input: NTSC composite video signal 
Packages: LC74785: DIP24S (300mil)
LC74785M: MFP24 (375mil)
Functions
Display structure: 12 lines 24 characters (up to 288 characters)
Character structure: 12 18 dots (H V)
Character size: Three sizes in each of the horizontal and vertical directions
Number of characters: 256 characters (254 characters, one space character, one transparent space character)
Display start positions: Horizontal: 64 positions, vertical: 64 positions
Blinking: Specified in horizontal units
Types of blinking: Two: periods of 1.0 and 0.5 seconds
Blinking of the whole character area (12 18 dots)
Background color: 8 colors (internal synchronization operation) at both 2 and 4 fsc
Line background color: Can be set for up to 3 lines
Line background color: 8 colors (internal synchronization operation) at both 2 and 4 fsc 
External control input:
Video signal inputs: NTSC, PAL, 
Packages: LC74789: DIP24S (300mil), LC74789M: MFP24 (375mil), LC74789JM: MFP24S (300mil)
Block Diagram
Block Diagram
CS1 
SIN 
SCLK 
CPDT 
CS2 
LN21 
Data output
buffe
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parallel | + |
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command |
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converter | decoder | Horizontal | Vertical | Horizontal | Vertical | Blinking | Display | RAM |
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| direction | direction | display | display | and | write | |
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| character | character | position | position | address | ||
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Output control |
| size register | size register | register | register | register | counter | |
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| Decoder |
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DATA SLICER |
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| Display RAM | |
| counter |
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| counter |
| inversion |
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CS | Serial |
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SIN | parallel | + |
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| command |
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SCLK | converter | decoder |
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| Horizontal | Vertical | Horizontal | Vertical | Blinking | Display | RAM write |
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| direction | direction | display | display | and | ||
RST |
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| character | character | position | position | inversion | |||
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| register | counter | |||||
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| size register | size register | register | register | control register | ||
VDD1 |
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| Horizontal |
| Vertical size |
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| Vertical dot | Blinking and |
| Decoder |
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VSS1 | size counter |
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| dot counter |
| counter | inversion |
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| Display RAM | |
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VDD1 
VSS1 
VDD2 
VSS2 
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SYNCJDG |
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| discriminator |
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| DATA |
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| HSYNC |
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| Pedestal clamp |
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| output dot |
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| clock generator |
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Horizontal | Vertical |
display | display |
position | position |
detection | detection |
Character | Line |
control | control |
counter | counter |
Timing generator |
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| Sync signal |
| Character output control |
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| Background control | ||
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| generator |
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| Video output control | |
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Decoder
Font ROM
Shift register
VDD2 |
| Horizontal display | Vertical display |
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VSS2 |
| position detection | position detection |
| Decoder |
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SYNCJDG | Sync | Character | Line control |
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discriminator | control |
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| counter | counter |
| Font ROM |
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OSCIN | Character |
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| output dot |
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| clock |
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OSCOUT | generator |
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| Character output control |
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| Timing generator | Sync signal generator | Shift register | ||
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SYNIN | Sync | Composite sync | |
SEPC | |||
signal separator | |||
discriminator | |||
SEPOUT | control | ||
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SEPIN |
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| XtalIN | COLR CVIN CVOUT |
SYNIN | RST SEPOUT OSCIN OSCOUT SEPIN | |||
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| CTRL1 | XtalOUT | |
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| (CHABLK) | (MUTE) | |
CTRL1 | XtalIN XtalOUT | HFTONOUT | CVCR CVOUT | |
(CHABLK) | (MUTE) | COLR | CVIN | |
57 SANYO TV . VCR | SANYO TV . VCR 58 |