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CS4954-CQ Scheda tecnica(PDF) 1 Page - Cirrus Logic

Il numero della parte CS4954-CQ
Spiegazioni elettronici  NTSC/PAL Digital Video Encoder
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Produttore elettronici  CIRRUS [Cirrus Logic]
Homepage  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS4954-CQ Scheda tecnica(HTML) 1 Page - Cirrus Logic

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Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
1
Copyright
© Cirrus Logic, Inc. 1999
(All Rights Reserved)
Cirrus Logic, Inc.
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.crystal.com
CS4954
CS4955
NTSC/PAL Digital Video Encoder
Features
l Six DACs providing simultaneous composite,
S-video, and RGB or Component YUV
outputs
l Programmable DAC output currents for low
imped-ance (37.5
Ω) and high impedance
(150
Ω) loads.
l Multi-standard support for NTSC-M, NTSC-
JAPAN, PAL (B, D, G, H, I, M, N,
Combination N)
l ITU R.BT656 input mode supporting
EAV/SAV codes and CCIR601 Master/Slave
input modes
l Programmable HSYNC and VSYNC timing
l Multistandard Teletext (Europe, NABTS,
WST) support
l VBI encoding support
l Wide-Screen Signaling (WSS) support, EIA-J
CPX1204
l NTSC closed caption encoder with interrupt
l CS4955 supports Macrovision copy
protection Version 7
l Host interface configurable
for parallel or I2C
compatible operation
l On-chip voltage reference
generator
l +3.3 V or +5 V operation,
CMOS, low-power modes,
tri-state DACs
Description
The CS4954/5 provides full conversion from digital video
formats YCbCr or YUV into NTSC and PAL Composite,
Y/C (S-video) and RGB, or YUV analog video. Input for-
mats can be 27 MHz 8-bit YUV, 8-bit YCbCr, or ITU
R.BT656 with support for EAV/SAV codes. Video output
can be formatted to be compatible with NTSC-M, NTSC-
J, PAL-B,D,G,H,I,M,N, and Combination N systems.
Closed Caption is supported in NTSC. Teletext is sup-
ported for NTSC and PAL.
Six 10-bit DACs provide two channels for an S-Video
output port, one or two composite video outputs, and
three RGB or YUV outputs. Two-times oversampling re-
duces the output filter requirements and guarantees no
DAC-related modulation components within the speci-
fied bandwidth of any of the supported video standards.
Parallel or high-speed I2C compatible control interfaces are
provided for flexibility in system design. The parallel interface
doubles as a general purpose I/O port when the CS4954/5 is
in I2C mode to help conserve valuable board area.
ORDERING INFORMATION
CS4954-CQ
48-pin TQFP
CS4955-CQ
48-pin TQFP
APR ‘99
DS278PP4
CLK
ISET
DGND
SCL
SDA
PDAT[7:0]
RD
WR
ADDR
XTAL_OUT
VD[7:0]
HSYNC
VSYNC
FIELD
INT
RESET
I2C Interface
Host
Parallel
Interface
Color Sub-carrier Synthesizer
8
Video Formatter
Control
Registers
Chroma Modulate
Chroma Amplifier
Output
Interpolate
LPF
Burst Insert
Chroma Interpolate
LPF
Luma Interpolate
Luma Amplifier
Sync Insert
U,V
Y
Video Timing
Generator
TEST
Current
Reference
Voltage
Reference
VREF
R
DAC
Y
DAC
CVBS
DAC
C
10-Bit
DAC
Σ
VAA
XTAL_IN
Teletext
Encoder
TTXRQ
TTXDAT
YCbCr to RBG
B
DAC
G
DAC
10-Bit
10-Bit
10-Bit
10-Bit
10-Bit
RGB
RGB
Y
Y
8
Color Space
Converter


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