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PDF WT6805 Data sheet ( Hoja de datos )
| Número de pieza | WT6805 | |
| Descripción | Monitor On Screen Display | |
| Fabricantes | Weltrend Semiconductor | |
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偉詮電子股份有限公司
Weltrend Semiconductor, Inc.
WT6805
Monitor On-Screen Display
Preliminary Data Sheet
REV. 1.1
August 30, 2002
The information in this document is subject to change without notice.
Weltrend Semiconductor, Inc. All Rights Reserved.
新竹市科學工業園區工業東九路 24 號 2 樓
2F, No. 24, Industry E. 9th RD., Science-Based Industrial Park, Hsin-Chu, Taiwan
TEL:886-3-5780241 FAX:886-3-5794278.5770419
www.EDmaatial:sSuhpepoert4@Uw.ecltoremnd.com.tw
1 page  
eltrend
WT6805
Data Sheet Rev. 1.1
Transmission Format
Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
Row
1 0 0 R4 R3 R2 R1 R0
Address Bytes
in Display RAM
Columna,b
(Row0~14) Columnc
0
0
0 D8 C4 C3 C2 C1 C0
1 D8 C4 C3 C2 C1 C0
Data
D7 D6 D5 D4 D3 D2 D1 D0
Row
1 0 1 R4 R3 R2 R1 R0
Attribute Bytes Columna,b 0 0 x C4 C3 C2 C1 C0
in Display RAM Columnc 0 1 x C4 C3 C2 C1 C0
Data
D7 D6 D5 D4 D3 D2 D1 D0
Row
1 1 0 R4 R3 R2 R1 R0
User Fonts Columna,b
Columnc
0
0
0 C5 C4 C3 C2 C1 C0
1 C5 C4 C3 C2 C1 C0
Data
D7 D6 D5 D4 D3 D2 D1 D0
Row
1 0 0 R4 R3 R2 R1 R0
Control
Registers
Columna,b
0
0
X C4 C3 C2 C1 C0
(Row15~16) Columnc 0 1 X C4 C3 C2 C1 C0
Data
D7 D6 D5 D4 D3 D2 D1 D0
Format
a,b,c
a,b
c
a,b,c
a,b,c
a,b
c
a,b,c
a,b,c
a,b
c
a,b,c
a,b,c
a,b
c
a,b,c
There are two ways to change D8 in format (c) of Row0~Row14 address byte.
- write D8 with column address.
- If the TP bit in Row16 Column3 is “1”, use data byte $FFh to toggle D8. This function can toggle
D8 without restarting a new I2C command. However, the fonts located at $0FFh and $1FFh
cannot be displayed in this condition.
Example:
If TP bit is set, write “S - 7A - 81 - 60 - 58 - 54 - FF- 07 - 09 - 01 - 06 - P”
The operation is :
(Row1, Column0) <= $158h
(Row1, Column1) <= $154h
Toggle D8
(Row1, Column2) <= $007h
(Row1, Column3) <= $009h
(Row1, Column4) <= $001h
(Row1, Column5) <= $006h
The read format is shown as follow.
S 0 1 1 1 1 0 1 0 A ROW A COL A S 0 1 1 1 1 0 1 1 A Data A Data A • • • • • P
Must use write format first to set row and column address, then follows a read command.
Weltrend Semiconductor, Inc.
Page 5
5 Page 
eltrend
WT6805
Data Sheet Rev. 1.1
Frame Control Register
OSD Vertical Starting Position Register
This register controls the vertical displacement from top.
(Row,Col) R/W Bit 7
(15,12) W VS7
Default Value = $04h
Minimum value = $01h
Bit 6
VS6
Bit 5
VS5
Bit4
VS4
Bit 3
VS3
VS7~VS0 – Vertical starting position. Each step is 4 Horizontal lines.
Vertical starting position = (VS x 4 )+2
Bit 2
VS2
VFLB
R,G,B
Output
VS
Bit 1
VS1
Bit 0
VS0
OSD Horizontal Starting Position Register
This register controls the vertical displacement from top.
(Row,Col) R/W Bit 7
(15,13) W HS7
Default Value = $0Fh
Minimum value = $01h
Bit 6
HS6
Bit 5
HS5
Bit4
HS4
Bit 3
HS3
Bit 2
HS2
HS7~HS0 – Horizontal starting position. Each step is 6 dots.
Horizontal starting position = (HS x 6) + 45 dot + PLL phase error
HFLB
R,G,B
Output
HS
Bit 1
HS1
Bit 0
HS0
Weltrend Semiconductor, Inc.
Page 11
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet WT6805.PDF ] | |
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