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參數(shù)資料
| 型號(hào)： | LC74981W |
| 文件頁(yè)數(shù)： | 2/10頁(yè) |
| 文件大?。?/td> | 160K |
| 代理商： | LC74981W |
I/O Specifications
Input Specifications (Main input signals)
Video signals
TV:
Two 8-bit digital YUV (CCIR 601) input systems.
The Y data is 8 bits, and the UV signal is an 8-bit
point sequential multiplexed signal.
Note: NTSC and PAL signals are referred to simply as
TV signals in this document.
DTV: One 8-bit digital YCbCr (CCIR 601) input
system. Supports the 480i and 480p formats.
Note: This IC does not perform frame rate conversion.
Thus only frame rates that fall within the
operating range of the LCD panel module used are
supported as input frame rates.
Synchronizing signals:
Both horizontal and vertical synchronizing signal are
input as two independent systems. They are switched
internally.
Any input polarity may be used. The IC detects the
polarity internally.
Blanking signal:
Provides as either a component signal or as a composite
signal.
Input processing clock:
Two clock systems are input independently. They are
switched internally.
Output processing clock: A fixed-frequency oscillator
provides 65.0 MHz clock.
Output Specifications (Main output signals)
Video signal:
with 6 bits per color.
A single-phase output mode is also support, and can be
selected by settings using the I
2
C bus. (Output is from
the ODD pin in this case.)
Synchronizing signals:
The period and polarity of both the horizontal and the
vertical signals may be set. The synchronizing signal
position is also variable.
A composite synchronizing signal can also be output
from the vertical output.
Blanking signals:
Horizontal and vertical blanking signals are provided.
The periods and the polarities can be set.
A composite blanking signal can also be output from the
vertical output.
Output processing clock:
In XGA mode, 65.0 MHz (DCLK1) and 32.5 MHz
(DCLK2) clocks are output.
Two-phase XGA digital RGB signal
Control Specifications
I
2
C bus: Used for setting internal registers and for
reading out status values. (SDA, SCL)
Three-wire bus: Control bus used for OSD control and
γ
correction settings. (AIDA, AICK, AICS)
External control output: EXCTR pin can be used for
general-purpose control of circuits external to the IC
over the I
2
C bus.
No. 6450-2/10
LC74980W
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
DD
V
I
V
I
, V
O
Tstg
–
0.3 to +4.6
V
Input voltage
–
0.5 to V
IN
+ 0.5
–
0.3 to V
DD
+ 0.3
–
55 to +125
V
I/O voltages
V
Storage temperature
°
C
Operating temperature
Topr
–
30 to +70
°
C
Electrical Characteristics
Absolute Maximum Ratings
at V
SS
= 0 V
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Supply voltage
V
DD
V
IN
3.0
3.3
3.6
V
Input voltage range
0
—
5.5
V
Allowable Operating Ranges
at Ta = –30 to +70°C
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Input pins
C
IN
C
OUT
C
I/O
f = 1 MHz
—
—
10
pF
Output pins
f = 1 MHz
—
—
10
pF
Bidirectional pins
f = 1 MHz
—
—
10
pF
I/O Pin Capacitances
at V
DD
= –V
I
= 0 V, Ta = 25°C
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