
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. 1997
(All Rights Reserved)
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
CS4952/53
NTSC/PAL Digital Video Encoder
Features
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
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
CLK
SCL
SDA
PDAT[7:0]
RD*
WR*
ADDR
XTAL
VD[7:0]
HSYNC*
VSYNC*
FIELD
INT
RESET*
C
CVBS37
CVBS75
Y
VREFIN
VREFOUT
ISET
VAA
GND
TEST
I C
Interface
Host
Parallel
Interface
Color Sub-carrier
Synthesizer
Video
Formatter
Video Timing
Generator
Control
Registers
Output
Interpolate
Chroma Amplifier
Chroma Modulate
Burst Insert
Chroma Interpolate
Luma Delay
Luma Amplifier
Sync Insert
9-Bit
DAC
Voltage
Reference
Current
Reference
8
8
LPF
LPF
Output
Interpolate
LPF
9-Bit
DAC
9-Bit
DAC
9-Bit
DAC
Σ
U, V
Y
OCT ‘97
DS223PP2