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PDF NT6827 Data sheet ( Hoja de datos )
| Número de pieza | NT6827 | |
| Descripción | I2C Bus Controlled On-Screen Display | |
| Fabricantes | Novatek Microelectronics | |
| Logotipo |  |
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NT6827
I2C Bus Controlled On-Screen Display
Features
n I2C Bus Interface with Slave Address $7A (Transmitter)
& $7B (Receiver)
n Horizontal Frequency Range: 30KHz ~ 120KHz
n Flexible Display Resolution Up to 1524 Dots/Row
n Internal PLL Generates a Stable and Wide-Range
System Clock (96MHz)
n OSD Screen Consists of Character Array of 15 Rows
by 30 Columns
n Programmable Vertical and Horizontal Positions for
OSD Display Center
n Total of 272 ROM Fonts Including 256 standard & 16
Multi-color ROM Fonts.
n 12 X 18 Dot Matrix Per Character
n 8-Color Selection for Each Character
n 7-Color Selection for Each Character Background
n Character/Symbol Blinking, Shadowing & Bordering
Display Effect
n Double Character Height and Width for Each Row
n Programmable Height for Character/Symbol Displaying
n Row To Row Spacing Control to Avoid Expansion
Distortion
n Four Programmable Windows with Overlapping
Capability and Shadowing Effect
n Color Setting for Windows’ Background and
Characters’ Shadowing & Bordering
n Fade-In/Out Effect of OSD Screen Display
n Selectable Hsync & Vsync Input Polarity
General Description
NT6827 is designed for displaying symbols and characters
onto a CRT monitor. Its operation is controlled by a micro-
controller with an I2C bus interface. By sending proper
data and commands to NT6827, it can carry out the full
screen display automatically with the time base being
generated by an on-chip PLL circuit. There are many
functions provided by this chip to fully support the user
applications, such as: adjustment of the OSD windows
position, built-in 256 ROM & 16 Multi-color fonts, variable
character height with row-to-row spacing adjustment, 8
color selections & 7 background color controls for each
character, double height/width controls for each row, 4
overlapping windows available with color & size controls,
size controls for each window shadowing, color selection
for windows’ shadowing & characters’ shadowing/
bordering and fade-in/out display effect ,etc.
www.DataSheet4U.com
1
V2.0
1 page  
DC/AC Absolute Maximum Ratings*
Recommended Operation Conditions
VCC (measured to GND) . . . . . . . . . . . . 4.75V to 5.25V
Operating Temperature . . . . . . . . . . . . . . 0 to +70 0C
NT6827
*Comments
Stresses above those listed under "Absolute Maximum
Ratings" may cause permanent damage to this device.
These are stress ratings only. Functional operation of
this device at these, or under any other conditions above
those indicated in the operational sections of this
specification is not implied or intended. Exposure to the
absolute maximum rating conditions for extended
periods may affect device reliability.
Electrical Characteristics (VDD = 5V, Tamb = 25°C)
Symbol
VCC
Parameter
Supply Voltage
Min.
4.75
Typ.
5
Max.
5.25
Unit
V-
Notes
DC Characteristic
Symbol
Parameter
IDD Operating Current
VIH1 Input High Voltage
VIL1 Input Low Voltage
VIH2 IIC Bus Input High Voltage
VIL2 IIC Bus Input Low Voltage
Idrive1
Driving current of R, G, B, FBKG, HFTON
output pins at 2.4V output voltage
Isink1
Sinking current of R, G, B, FBKG, HFTON
output pins at 0.4V output voltage
Ileak
Leakage current of R, G, B, FBKG pins at
Hi-Z state
Iiicl IIC Bus Output Sink Current
Vth Input Threshold Voltage at HFLB & VFLB pin
VSTIH Schmitt Trigger Input High Voltage
VSTIL Schmitt Trigger Input Low Voltage
Iin Input Current of Hsync, Vsync, SDA, SCL pins
www.DataSheet4U.com
Min. Typ. Max.
- 22 25
2-
-
- - 0.8
3-
-
- - 1.5
80 -
-
20 -
-
- - 10
-5
-
1.8 2.0 2.2
1.7 2
0.8 1.1
-
-10 - +10
Unit Notes
mA No loading
V
VFLB, HFLB with
Schmitt Trigger Buffer
V
VFLB, HFLB Schmitt
Trigger Buffer
V
SCL, SDA
V
mA -
mA -
uA Measured at 2.5V state
mA Viicoutl = 0.4V
V-
V-
V-
uA Schmitt Trigger Buffer
5
5 Page 
NT6827
(3) Row Attribute Register: Row 0 - 14, Column 30
Row 0 - 14
Column 30
76543210
DBH DBW
Row’s Attribute Control
Bit 1: DBH- This bit controls the height of the displayed character/symbol. When this bit is set, the character/symbol is
displayed in double height.
Bit 0: DBW- This bit controls the width of the displayed character/symbol. When this bit is set, the character/symbol is
displayed in double width.
(4) Window 1 Registers: Row 15, Column 0
Row 15
Column 0
7
MSB
6543
Row Start Address
LSB MSB
210
Row End Address
LSB
Window 1 Row Size Control
Bit 7 - 4: These bits determine the row start position of window 1on the 15*30 OSD screen.
Bit 3 - 0: These bits determine the row end position of window 1on the 15*30 OSD screen.
Row 15
Column 1
7
MSB
654
Column Start Address
32
WINEN
LSB
1
Window1 Column Size Control & Attribute Control
0
SHAD
Bit 7-3: These bits determine the column start position of window 1on the 15*30 OSD screen.
Bit 2: WINEN - This bit enables window 1 when it is set. The default value of it is '0' after power on.
Bit 0: SHAD - This bit enables the shadowing on the window when it is set to ‘1’. The default value of it is '0' after power
on.
Row 15
Column 2
765
Column End Address
MSB
4
32
LSB R
Window1 Column Size Control & Attribute Control
1
G
0
B
Bit 7 - 3: These bits determine the column end position of window 1on the 15*30 OSD screen.
Bit 2 - 0: R/G/B - These bits control the background color of window 1. Refer to Table 7 for color selection.
Note: Window 1 control registers occupy column 0 - 2 of row 15, Window 2 from column 3 - 5, Window 3 from 6 - 8
and Window 4 from 9 - 11. The function of Window 2 - 4 control registers is the same as Window 1. Window 1
www.DataSheehwt4ainUsd.tcohowemhairgehae. st priority, and Window 4 the least. The higher priority color will take over on the overlapped
If the start address of the row/column is greater than the end address, this window will not be displayed.
An out of range setting (over the 15 row or 30 column range) will cause abnormal operation.
11
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| PDF Descargar | [ Datasheet NT6827.PDF ] | |
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