Weltrend Semiconductor, Inc.
WT6804
Monitor On-Screen Display
Data Sheet
REV. 1.02
August 17, 2001
The information in this document is subject to change without notice.
©Weltrend
Semiconductor, Inc. All Rights Reserved.
2F, No. 24, Industry E. 9 RD., Science-Based Industrial Park, Hsin-Chu, Taiwan
TEL:886-3-5780241 FAX:886-3-5794278.5770419
Email:support@weltrend.com.tw
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WT6804
Data Sheet Rev. 1.02
GENERAL DESCRIPTION
The WT6804 is an on-screen display (OSD) IC which display color symbols or characters onto monitor.
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With the control of microcontroller through I C interface, it can display characters with special effect like
blinking or shadowing automatically.
FEATURES
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Programmable horizontal resolutions up to 1530 dots per line
Horizontal frequency up to 120KHz
On-chip PLL up to 100MHz
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
Double character height and width control
Programmable character height (18 to 71 lines)
Programmable row-to-row spacing
Programmable vertical and horizontal positioning for display screen center
Bordering, shadowing and blinking effect
Fade-in/fade-out effects
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I C interface with slave address $7AH
Power supply : 5V
Package type : 16-pin plastic DIP/SOP
PIN CONFIGURATION
Weltrend Semiconductor, Inc.
Page 2
WT6804
Data Sheet Rev. 1.02
PIN DESCRIPTION
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
NC
LF
VDDA
HFLB
CLKIN
SDA
SCL
VDD
VFLB
POUT
FBKG
BOUT
GOUT
ROUT
VSS
I
I
I
I
Pin Name
VSSA
I/O
Analog ground.
No connection.
I/O Loop filter of PLL.
Analog power supply
Horizontal sync input.
External clock input.
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Description
I/O Serial data of I C interface.
Serial clock of I C interface.
Digital power supply
Vertical sync input.
O Programmable general purpose output pad
Fast Blanking output. This pin controls the mixer of vedio
O amplifier to cutoff the video signal while displaying character or
window.
O Blue color output
O Green color output
O Red color output
Digital ground
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Weltrend Semiconductor, Inc.
Page 3
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