CDB4954A/55A
Evaluation Board for CS4954/55
Features
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Description
The CDB4954A/55A board allows fast evaluation of the
features of the CS4954 digital video encoders. The
board may also be configured to accept external TTL
level timing and data signals for use during system
development.
Also, to simplify the demonstration of the features of the
CS4954, the CDB4954A/55A is equipped with an on-
board microcontroller and pre-programmed FLASH
memory to facilitate configuration and evaluation of the
CS4954 digital video encoder.
Demonstrates recommended layout and
grounding practices
Supports both parallel and serial digital
video input
On-board test pattern generation
Supports NTSC/PAL video formats
3.3 V or 5 V operation
Composite, S-Video, and RGB outputs
Supports Standalone mode via onboard
DIP switch
RS232 interface with PC
Single 6-9 V external DC power supply
Additional op-amps with open pads for
prototyping additional filters
I
ORDERING INFORMATION
CDB4954A
Evaluation Board
CDB4955A
Evaluation Board
CCIR 656 SERIAL/ PARALELL
INPUTS
POWER
INLET
6.5 - 10VDC
Regulator
+3.3V
3.3V
or
+5V
+5V
DB25
PLD
EEPROM
ISP
656_IN
ECL
RECEIVER
BNC
Regulator
SMPTE-259M
Interface
656
OSC
Reset
OPEN
MPU
PROGRAM
HEADER
Reset
Switch
RESET-
PROG
1
2
3
4
5
6
7
8
54MHZ
CTL
Addr
Data
RESET-
RESET-
ALE
WR-
RD-
A/D7:0
FPGA
CTL
Addr
Data
RESET-
SDRAM
PROGRAMMING
ENABLE
JUMPER
Flash
Motorola 908
Microcontroller
D
B
9
RXD
RS-232
Interface
SDL
SDA
TXD
RESET
TX
RX
PC SERIAL
INTERFACE
245
BUFFER
656
TTX
HS,VS,
27MHz DATA
/2
FIELD
/8
Hdr -
16PIN
Hdr -
16PIN
SELECTABLE
HI/LOW
IMPEDANCE
FILTERS
OUT
FILT
OUT
FILT
OUT
FILT
OUT
FILT
OUT
FILT
OUT
FILT
DIN4
CONN.
u
RCA
CONNECTOR
RCA
CONNECTORS
TTXD,
TTXRQ
R
G
ADDR
RD-
WR-
DAT<7..0>
RST-
CS4954
SDA_O
SCL
SDA
SCL
B
Y
C
CVBS
4K
1%
TEST
Preliminary Product Information
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright
Cirrus Logic, Inc. 2001
(All Rights Reserved)
MAY ‘01
DS278DB2
1
CIRRUS [ CIRRUS LOGIC ]
