Weltrend Semiconductor, Inc.
WT6805
Monitor On-Screen Display
Preliminary Data Sheet
REV. 1.0
December 3, 2001
The information in this document is subject to change without notice.
©Weltrend
Semiconductor, Inc. All Rights Reserved.
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
eltrend
GENERAL DESCRIPTION
WT6805
Data Sheet Rev. 1.0
The WT6805 is an on-screen display (OSD) IC which display color symbols or characters onto monitor.
With the control of microcontroller through I
2
C interface, it can display characters with special effect like
blinking or shadowing automatically.
FEATURES
•
Programmable horizontal resolutions up to 1530 dots per line
•
Horizontal frequency up to 150KHz
•
On-chip PLL up to 150MHz
•
Fully programmable character array of 15 rows by 30 columns
•
12x18 dot matrix per character
•
512 characters and graphic symbols ROM
•
16 multi-color fonts
•
8 user RAM font
•
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, blinking and box effect
•
Fade-in/fade-out effects
•
I
2
C interface with slave address $7AH
•
Power supply : 5V
•
Package type : 16-pin plastic DIP/SOP
PIN ASSIGNMENT AND PACKAGE TYPE
PACKAGE TYPE : PDIP-16, SOP-16
Weltrend Semiconductor, Inc.
Page 2
eltrend
Pin
Name
VSSA
RV
VCO
VDDA
HFLB
CLKIN
SDA
SCL
VDD
VFLB
POUT
FBKG
BOUT
GOUT
ROUT
VSS
I
O
O
O
O
O
I
I
I/O
I
I
I/O
WT6805
Data Sheet Rev. 1.0
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
I/O
Analog ground.
Description
A resistor can be connected to this pin for control VCO range.
Loop filter of PLL.
Analog power supply
Horizontal sync input.
External clock input.
Serial data of I
2
C interface.
Serial clock of I
2
C interface.
Digital power supply
Vertical sync input.
General purpose output pad
Fast Blanking output. This pin controls the mixer of vedio amplifier to
cutoff the video signal while displaying character or window.
Blue color output
Green color output
Red color output
Digital ground
Weltrend Semiconductor, Inc.
Page 3
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