SANYO LC74411N, LC74411NE Datasheet

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.

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

Package Dimensions

unit: mm

3071-DIP64S

unit: mm

3159-QFP64E

CMOS LSI

Ordering number : EN*5519A

93196HA (OT) No. 5519-1/14

Preliminary

SANYO: DIP64S

[LC74411N]

SANYO: QIP64E

[LC74411NE]

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN

PIP Controller

LC74411N, LC74411NE

Note:

When the main screen
synchronization PLL uses the
standard value
(PLL4 : 0 = 10110)

D/A clock

Y 11.6 MHz
R-Y 2.9 MHz
B-Y 2.9 MHz

Pin Assignments

No. 5519-2/14

LC74411N, LC74411NE

Block Diagram

No. 5519-3/14

LC74411N, LC74411NE

LC74411N and LC74411NE Based PIP System

Function Overview

• Reduction sizes
– Vertical : 1/3, 1/4; The vertical filter coefficient can be selected.
– Horizontal: 1/3, 1/4; Variable at the PLL.

• Still image
– Field still image

• Display position
– Eight bits in each of the vertical and horizontal directions

• Frame
– Frame or no frame can be selected.
– Frame types differ according to the insertion method

Pin frame : A pin output that goes high at the frame position (for frame insertion by the application)
DAC frame: Frame overlapped onto the image signal. Four bits for each of the Y, R-Y, and B-Y signals.

• Wipe
– Supports eleven different types of wipe.

• Blanking size
– The vertical and horizontal directions can be specified independently (6 bits each)
– Eleven form specification types

• Memory clear
– The image data written to memory can be set to a fixed value.
– Either 25% white or blue can be selected.

• Wide-aspect-ratio TV support
– Aspect compensation function

• Support for NTSC, PAL, and multi-format systems

• External control function using the I2C bus
– Incorporates six on-chip 8-bit D/A converter circuits
– Provides eight general-purpose port pins.

• Wide range of settings and adjustments
– Sub-screen displacement, color shifting, and other settings can be adjusted using the I2C bus.

No. 5519-4/14

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

LC74411N, LC74411NE