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
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.
WT6805
Data Sheet Rev. 1.0
Weltrend Semiconductor, Inc.
Page 2
eltrend
GENERAL DESCRIPTION
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
WT6805
Data Sheet Rev. 1.0
Weltrend Semiconductor, Inc.
Page 3
eltrend
Pin No.
Pin
Name
I/O
Description
1
VSSA
Analog ground.
2
RV
I
A resistor can be connected to this pin for control VCO range.
3
VCO
I/O
Loop filter of PLL.
4
VDDA
Analog power supply
5
HFLB
I
Horizontal sync input.
6
CLKIN
I
External clock input.
7
SDA
I/O
Serial data of I
2
C interface.
8
SCL
I
Serial clock of I
2
C interface.
9
VDD
Digital power supply
10
VFLB
I
Vertical sync input.
11
POUT
O
General purpose output pad
12
FBKG
O
Fast Blanking output. This pin controls the mixer of vedio amplifier to
cutoff the video signal while displaying character or window.
13
BOUT
O
Blue color output
14
GOUT
O
Green color output
15
ROUT
O
Red color output
16
VSS
Digital ground
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