LC74735NW Datasheet, PDF (1/52 Pages) Sanyo Semicon Device – On-Screen Display Controller

Ordering number : ENN7545
CMOS IC
LC74735NW
On-Screen Display Controller
Overview
The LC74735NW is an on-screen display CMOS IC that
displays characters and patterns on a TV screen.
For QVGA display, the LC74735NW supports the use of
both a 12 × 18 dot character font and a 12 × 18 dot
graphics font with 16 colors with a total of 512 characters
and glyphs.
For WVGA display, the LC74735NW supports the use of
both a 24 × 32 dot character font and a 12 × 16 dot
graphics font with 16 colors with a total of 512 characters
and glyphs.
The LC74735NW can also implement extremely varied
displays by the use of an external ROM.
The LC74735NW supports both QVGA (480 × 234) and
WVGA (800 × 480).
Features
• Screen structure
— Main:
QVGA mode: 40 characters × 13 lines (up to 520
characters) on a QVGA panel
WVGA mode: 33 characters × 15 lines (up to 495
characters) on a WVGA panel
— Wallpaper display screen: Permanent repetition of a
2 × 2 (horizontal × vertical) character pattern
• Character structure
— QVGA mode:
12 dots (horizontal) × 18 dots (vertical): Character
display
12 dots (horizontal) × 18 dots (vertical): Graphic
glyph display
— WVGA mode:
24 dots (horizontal) × 32 dots (vertical): Character
display
12 dots (horizontal) × 16 dots (vertical): Graphic
glyph display (1 pixel: 2 × 2 dots)
— Character display clock:
About 9 MHz — QVGA with an LC oscillator
33.2 MHz (maximum: 40 MHz) WVGA with an
external clock signal input
*: The ROM image is known when QVGA or WVGA
mode is specified.
• Number of characters: 512 (internal)
Up to 2048 characters when an external 16-bit 4M ROM
is used.
• Character sizes: Four horizontal sizes (1×, 2×, 3×, and
4×)
Four vertical sizes (1×, 2×, 3×, and 4×)
(The character size is specified in line
units.)
• Display start positions: 512 positions in the horizontal
direction and 256 positions in the vertical direction.
QVGA mode WVGA mode
Setting units: Horizontal: 1 dot
2 dots (In
screen units)
Vertical: 1 dot
2 dots (In
screen units)
• Display functions
— Blinking specification (in character units)
Period: 1/64, 1/32, and 1/16 of the vertical sync
signal (in screen units)
Duty: Fixed at 50%
— Box (raised or recessed) display
Raised/recessed specification (in character units)
Left: Off/on specification (in character units)
Right: Off/on specification (in character units)
Top: Off/on specification (in character units)
Bottom: Off/on specification (in character units)
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
O1003TN (OT) No. 7545-1/52