LC74735YW Datasheet, PDF (1/52 Pages) ON Semiconductor – Mini Buck Converter for RF Power Amplifiers

Ordering number : ENA2330
LC74735YW
CMOS LSI
On-Screen Display Controller
http://onsemi.com
Overview
The LC74735YW is an on-screen display CMOS IC that displays characters and patterns on a TV screen. For
QVGA display, the LC74735YW 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 LC74735YW 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 LC74735YW can also implement extremely varied displays by the use of an external ROM. The
LC74735YW 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)
— Border specification (in line units) :
Only valid with glyphs from the character font.
 Color specification
Character
SQFP80(12X12)
— Character color (in character units) : 1 of 16 colors can be specified.
— Character background color (in character units) : 1 of 16 colors can be specified.
— Border color (in line units) : 1 of 16 colors can be specified.
Semiconductor Components Industries, LLC, 2013
July, 2013
hk 20110413-S00004/ O1003TN(OT) No.A2330-1/52