LC74760 Sanyo Semiconductor Corporation, LC74760 Datasheet

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LC74760

Manufacturer Part Number
LC74760
Description
On-screen display IC
Manufacturer
Sanyo Semiconductor Corporation
Datasheet

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Overview
The LC74760 and LC74760M are on-screen display
CMOS ICs that superimpose text and low-level graphics
onto a TV screen (video signal) under microprocessor
control. The display characters have a 12 by 18 dot
structure, and 128 characters are provided. The display
area consists of 12 lines of 24 characters each.
Features
• Display structure: 12 lines by 24 characters (up to 288
• Number of displayed characters: Up to 288 characters
• Character configuration: 12 (W) by 18 (H) dot structure
• Character sizes: Three sizes (normal, double, and triple
• Display starting positions: 64 horizontal and 64 vertical
• Reverse video function: Characters can be inverted on a
• Flashing types: Two types with periods of 0.5 and 1.0
• Background color: One of eight colors (when internal
• External control input: Serial data input in 8-bit units
• Built-in horizontal/vertical sync separation circuit, AFC
• Video output: Composite video signal output in NTSC,
Ordering number : EN4453A
characters)
sizes)
locations
per character basis.
second on a per character basis (duty fixed at 50%)
synchronization used)
circuit, and synchronization detector
PAL, PAL-M, PAL-N, PAL60, NTSC4.43, or SECAM
format
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-0005 JAPAN
Package Dimensions
unit: mm
3061-DIP30S
unit: mm
3073A-MFP30S
On-Screen Display IC
LC74760, 74760M
13096HA (OT)/73093JN (OT) No. 4453-1/14
[LC74760M]
[LC74760]
SANYO: MFP30S
SANYO:DIP30S
CMOS IC

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LC74760 Summary of contents

Page 1

... Ordering number : EN4453A Overview The LC74760 and LC74760M are on-screen display CMOS ICs that superimpose text and low-level graphics onto a TV screen (video signal) under microprocessor control. The display characters have dot structure, and 128 characters are provided. The display area consists of 12 lines of 24 characters each. ...

Page 2

... W(SCLK) Minimum input pulse width t W(CS) t SU(CS) Data setup time t SU(SIN) t h(CS) Data hold time t h(SIN) t word One word write time t wt LC74760, 74760M 25°C Condition pins DD1 DD2 All input pins HSYNC , VSYNC , OUT OUT SYNC pins DET Condition V pin ...

Page 3

... V Power supply connection DD1 LC74760, 74760M Description Ground connection Connection for the crystal and capacitor used to form the crystal oscillator that generates the internal synchronization signal. (For an NTSC crystal oscillator 4fsc = 14.318 MHz.) Outputs the horizontal synchronization signal (AFC). The polarity can be selected with a metal switch ...

Page 4

... Pin Assignment Serial Data Input Timing LC74760, 74760M No. 4453-4/14 ...

Page 5

... System Block Diagram LC74760, 74760M No. 4453-5/14 ...

Page 6

... When the CS pin is set high the command state is set to COMMAND0, i.e., display memory write address setting mode. 1 COMMAND0: Display Memory Write Address Setting Mode First data byte DA0 to DA7 Register name State 7 — — — — LC74760, 74760M First byte Data at2 at1 ...

Page 7

... Note: When the chip is reset by the RST pin, the register states (bits) are all cleared to 0. LC74760, 74760M Register content Function Second byte identification code Display memory character address (from (hexadecimal)) Register content Function The command 1 identification code: sets the display memory write address. ...

Page 8

... SZB1 SZB0 SZ91 SZ90 1 LC74760, 74760M Register content Function The command 2 identification code: sets the vertical display position. SZ20 0 SZ21 0 Normal size Double size 1 Triple size Normal size SZ10 0 SZ11 0 Normal size Double size 1 Triple size Normal size ...

Page 9

... SYS RAM ERS OSC STP RND SEL 1 LC74760, 74760M Register content Function Second byte identification code The horizontal display start position is given HPn where Tc is the period of the OSCIN and OSCOUT oscillator in operating mode. Register content Function The command 4 identification code: sets display control parameters ...

Page 10

... PH2 PH1 PH0 INT/EXT 1 LC74760, 74760M Register content Function Second byte identification code Interlaced Non-interlaced BLK0 0 BLK1 0 Blanking off Character size blanking 1 Frame size blanking Total area blanking Flashing period about 0.5 s Flashing period about 1 s Highlight function Flashing function ...

Page 11

... MOD1 MOD0 1 LC74760, 74760M Register content Function Second byte identification code Normal operation Test mode Sets the character intensity level to about 95 IRE (bright white). Sets the character intensity level to about 75 IRE (white with a touch of grey). Sets the blanking intensity level to about 5 IRE (a deep black as a frame level) ...

Page 12

... LIN0 1 Note: When the chip is reset by the RST pin, the register states (bits) are all cleared to 0. LC74760, 74760M Register content Function Second byte identification code Sets the mode setting pin input pin. Sets the mode setting pin output pin. ...

Page 13

... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of January, 1996. Specifications and information herein are subject to change without notice. LC74760, 74760M No. 4453-13/14 ...

Page 14

... Composite Video Signal Output Levels (internally generated levels) LC74760, 74760M PS No. 4453-14/14 ...

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