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
WT6801
Monitor On-Screen Display
Data Sheet
REV. 1.0
June 27, 2000
The information in this document is subject to change without notice.
Weltrend Semiconductor, Inc. All Rights Reserved.
WT6801
Data Sheet Rev. 1.0
Weltrend Semiconductor, Inc.
Page 2
GENERAL DESCRIPTION
The WT6801 is designed to display color symbols or characters onto monitor. By storing display data in its
RAM and control information in the registers via I
2
C interface, WT6801 can carry out screen refresh without
any MCU supervision.
FEATURES
Programmable horizontal resolutions up to 1530 dots per line
Horizontal frequency up to 120KHz
On-chip PLL up to 96MHz
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 effect
Video timing capture for auto sizing
I
2
C interface with slave address $7AH
Package type : 16-pin and 20-pin plastic DIP/SOP
PIN CONFIGURATION
11
12
16
15
14
13
17
18
19
20
10
9
8
7
6
5
4
3
2
1
BIN
BOUT
CLKIN
FBKG
GIN
GOUT
HFLB
HFX
LF
RIN
ROUT
SCL
SDA
VCO
VDD
VDDA
VFLB
VSS
VSSA
9
10
11
12
16
15
14
13
8
7
6
5
4
3
2
1
BOUT
CLKIN
FBKG
GOUT
HFLB
LF
ROUT
SCL
SDA
VCO
VDD
VDDA
VFLB
VSS
VSSA
HFX
WT6801S160
WT6801N160
WT6801S200
WT6801N200
WT6801
Data Sheet Rev. 1.0
Weltrend Semiconductor, Inc.
Page 3
PIN DESCRIPTION
Pin No.
N160
S160
N200
S200
Pin Name
I/O
Description
1
1
VSSA
Analog ground.
2
2
LF
I/O Loop filter of PLL.
3
3
VCO
I/O VCO control voltage input.
4
4
VDDA
Analog power supply
5
5
HFLB
I
Horizontal sync input.
6
6
CLKIN
I
External clock input.
7
7
SDA
I/O Serial data of I
2
C interface.
8
8
SCL
I
Serial clock of I
2
C interface.
9
BIN
I
Blue color input.
10
GIN
I
Green color input.
11
RIN
I
Red color input.
12
NC
No Connection.
9
13
VDD
Digital power supply
10
14
VFLB
I
Vertical sync input.
11
15
HFX
O Output a sync signal with N times Hsync input frequency.
12
16
FBKG
O Fast Blanking output. This pin controls the mixer of vedio amplifier
to cutoff the video signal while displaying character or window.
13
17
BOUT
O Blue color output
14
18
GOUT
O Green color output
15
19
ROUT
O Red color output
16
20
VSS
Digital ground
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