Weltrend Semiconductor, Inc.
2F, No. 24, Industry E. 9
th
RD., Science-Based Industrial Park, Hsin-Chu, Taiwan
TEL:886-3-5780241 FAX:886-3-5794278.5770419
Email:support@weltrend.com.tw
WT6803
Monitor On-Screen Display
Data Sheet
REV. 1.01
September 24, 2001
The information in this document is subject to change without notice.
Weltrend Semiconductor, Inc. All Rights Reserved.
WT6803
Data Sheet Rev. 1.01
Weltrend Semiconductor, Inc.
Page 2
GENERAL DESCRIPTION
WT6803 is designed to interface with a MCU to do the OSD (On Screen Display) function in CRT monitor.
The on-chip PLL generates a wide-ranged system clock up to 160 MHz to meet the resolution
requirements (OSD resolution is programmable) of different display modes. The full OSD screen size is 30
columns x 15 rows, and setting the internal registers can freely program the OSD position. Special
functions include color font, character bordering, shadowing, blinking, double height, double width, all
blanking effect, row to row spacing control, 4 windows with shadowing and programmable fin in / fan out
effect.
FEATURES
Programmable horizontal resolutions up to 2040 dots per line
Horizontal frequency up to 150kHz
Dot Frequency generated by On-chip PLL up to 160MHz
Fully programmable character array of 15 rows by 30 columns
12x18 dot matrix per character
256 characters and graphic symbols ROM including 16 multi-color fonts
8 colors per display character
7 colors per display character background
4 programmable windows
8 colors per display window
8 colors per display window shadowing
Double character height and width control
Programmable character height (18 to 69 lines)
Programmable row-to-row spacing
Programmable OSD vertical and horizontal starting position
Bordering, shadowing and blinking effect
Fade-in/fade-out effects
I
2
C interface with slave address $7AH
Power supply: 5V
Package type: 16-pin plastic DIP
PIN CONFIGURATION
VS
B
BLANK
NC
VDD
VSS
G
16
15
14
13
12
11
10
9
WT6803
1
2
3
4
5
6
7
8
R
VSSA
NC
VCO
VDDA
HS
NC
SDA
SCL
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