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PDF LC74411NE Data sheet ( Hoja de datos )

Número de pieza LC74411NE
Descripción PIP Controller
Fabricantes Sanyo Semicon Device 
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No Preview Available ! LC74411NE Hoja de datos, Descripción, Manual

Ordering number : EN*5519A
CMOS LSI
LC74411N, LC74411NE
PIP Controller
Preliminary
Overview
The LC74411N and LC74411NE are digital processing
controllers for PIP (picture-in-picture) systems in TV sets
and VCRs. These ICs incorporate three circuits, a
multiplexed A/D converter, field memory, and a D/A
converter, to implement the PIP digital processing block in
a single chip.
Package Dimensions
unit: mm
3071-DIP64S
[LC74411N]
Features
• Horizontal resolution: 450 pixels*
• Single-chip implementation of the three circuits required
in a PIP digital processing block: A/D converter, field
memory, and D/A converter circuits
• High image quality provided by vertical filtering
• I2C bus adopted
• Built-in PLL circuit (requires an external low-pass filter)
• Supports NTSC and PAL, TV and VCR applications,
and multi-format (NTSC and PAL) applications.
• External control function
• 8-bit D/A converter (PWM type): 6 pins
• General-purpose ports: 8 pins
• Sub-screen specifications
• Display on/off, frame/no frame, frame color switching,
wipe function
• Display position - Specifiable as an 8-bit value for each
of the horizontal and vertical directions.
• Size
Vertical reduction: 1/3, 1/4
Horizontal reduction: 1/3, 1/4
– The horizontal size can be adjusted by adjusting the
PLL divisor
– The display area vertical and horizontal positions
can be varied independently.
• Horizontal resolution (Y signal): about 190 dots
• Quantization: 6 bits
• Operating supply voltage LC74411NE : 5 V ±5%
LC74411N : 5 V ±10%
• Package
LC74411NE : QFP64E
LC74411N : DIP64S
Note:
D/A clock When the main screen
Y 11.6 MHz synchronization PLL uses the
R-Y 2.9 MHz standard value
B-Y 2.9 MHz (PLL4 : 0 = 10110)
unit: mm
3159-QFP64E
[LC74411NE]
SANYO: DIP64S
SANYO: QIP64E
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
93196HA (OT) No. 5519-1/14

1 page




LC74411NE pdf
LC74411N, LC74411NE
Sub-Screen Size
The vertical and horizontal directions can be controlled independently.
• Vertical size
– 1/3: Three scan lines are compressed to one.
– 1/4: Four scan lines are compressed to one.
• Horizontal size
– 1/3: A/D clock : D/A clock = 1:3
– 1/4: A/D clock : D/A clock = 1:4
When 1/4 compression is used, the output data will be 3/4 of 1/3 of the input data.
– Aspect ratio correction function
The horizontal size is adjusted by changing the VCO frequency (system clock).
This frequency can be changed from –30% to +30%.
Wipe Function
The WTOP, WBOT, WLEFT, and WRIGHT operations can be specified independently.
Display Area Function
This function controls an area to be blanked.
The vertical and horizontal directions can be set independently.
The operating mode is set using the wipe function WTOP, WBOT, WLEFT, and WRIGHT parameters.
No. 5519-5/14

5 Page





LC74411NE arduino
LC74411N, LC74411NE
Sub-Screen Digital Processing Specifications
Item
Order
NTSC (fH = 15734Hz)
PAL (fH = 15625Hz)
Y, R–Y, Y, B–Y, Y, –, Y, –, ······
Frequency
fT (MHz)
Y only
A/D converter sampling
fTY
R-Y only
fTR
B-Y only
fTB
Number of bits in quantization
7.552
3.776
0.944
0.944
480 fH
240 fH
60 fH
60 fH
6 bits
7.500
3.750
0.938
0.938
D/A converter clock
(MHz)*1
Y signal
fCY
R-Y signal
fCR
B-Y signal
fCB
Number of horizontal bits
11.58
2.895
2.895
736 fH
184 fH
184 fH
288
11.50
2.875
2.875
Y only
192
Write
R-Y only
48
B-Y only
48
Number of vertical lines
73
85
Number of horizontal bits
268
Readout display*2
Y only
R-Y only
180
44
B-Y only
44
Number of vertical lines
72
84
Note: 1. When the PLL divisor has its standard value (PLL4:0 = 10110).
2. Target values are shown. (The number of horizontal bits varies with, for example, the frame width adjustment.)
Initialization
(1) RES pin: Reset
The RES pin must be held low when power is first applied with the timing shown in the figure.
(2) Internal control registers
After a reset, the chip goes to the standby state (SBY = high). When developing the microcontroller software, that
software must be designed so that it transmits data for all registers. Also note that data values of zero (0) must be sent
for the control registers that have ‘0’ entries in the control register table.
No. 5519-11/14

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