CS4952/53
NTSC/PAL Digital Video Encoder
Features
Description
The CS4952/3 provides full conversion from YCbCr or
YUV digital video formats into NTSC & PAL Composite
and Y/C (S-video) analog video. Input formats can be
27 MHz 8-bit YUV, 8-bit YCbCr, or CCIR656 with sup-
port for EAV/SAV codes. Output video can be formatted
to be compatible with NTSC-M, or PAL B,D,G,H,I,M,N,
and Combination N systems. Also supported is NTSC
line 21 and line 284 closed captioning encoding.
Four 9-bit DACs provide two channels for an S-Video out-
put port and two composite video outputs. 2x oversampling
reduces the output filter requirements and guarantees
no DAC related modulation components within the spec-
ified bandwidth of any of the supported video standards.
Parallel or high speed I
2
C compatible control interfaces
are provided for flexibility in system design. The parallel
interface doubles as a general purpose I/O port when the
CS4952/3 is in I
2
C mode to help conserve valuable
board area.
ORDERING INFORMATION
CS4952/3-CL 44 pin PLCC
CS4952/3-CQ 44 pin TQFP
VAA
CLK
SCL
SDA
PDAT[7:0]
RD*
WR*
8
Host
Parallel
Interface
l
Simultaneous composite and S-video output
l
Supports RS170A and CCIR601 composite
output timing
l
Multi-standard support for NTSC-M, PAL (B, D,
G, H, I, M, N, Combination N)
l
Optional progressive scan @ MPEG2 field rates
l
CCIR656 input mode supporting EAV/SAV
codes and CCIR601 Master/Slave input modes
l
Stable color subcarrier for MPEG2 systems
l
NTSC closed caption encoder with interrupt
l
Supports Macrovision copy protection in
CS4953 version
l
Host interface configurable for parallel or I
2
C
compatible operation
l
General purpose input and output pins
l
Individual DAC power-down capability
l
On-chip voltage reference generator
l
On-chip color bar generator
l
+5 volt only, CMOS, low power modes, tri-state
DACs
I
2
C
Interface
Control
Registers
Output
Interpolate
LPF
9-Bit
DAC
9-Bit
DAC
Σ
9-Bit
DAC
C
Chroma Amplifier
Chroma Modulate
Burst Insert
Chroma Interpolate
CVBS37
CVBS75
ADDR
XTAL
Color Sub-carrier
Synthesizer
9-Bit
DAC
Y
VD[7:0]
8
Video
Formatter
U, V
Y
LPF
Luma Delay
Luma Amplifier
HSYNC*
VSYNC*
FIELD
INT
RESET*
Sync Insert
Video Timing
Generator
Output
Interpolate
GND
LPF
Voltage
Reference
Current
Reference
TEST
VREFIN
VREFOUT
ISET
Preliminary Product Information
Cirrus Logic, Inc.
Crystal Semiconductor Products Division
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.crystal.com
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright
©
Cirrus Logic, Inc. 1997
(All Rights Reserved)
OCT ‘97
DS223PP2
1
CIRRUS [ CIRRUS LOGIC ]
