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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 onboard 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
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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 RESETPROG
1 2 3 4 5 6 7 8
54MHZ CTL Addr Data RESETRESETALE WRRDA/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 RDWRDAT<7..0> RSTCS4954 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
CDB4954A/55A
TABLE OF CONTENTS
1. CDB4954A/55A SYSTEM OVERVIEW .................................................................................... 4 2. SETUP ACTIVITIES .................................................................................................................. 4 2.1 DIP Switch Options ............................................................................................................ 4 2.2 Control Port Software ......................................................................................................... 4 2.2.1 Changing a CS4954/5 or FPGA Register ............................................................. 4 2.2.2 Actions Menu ........................................................................................................ 5 2.2.2.1 Convert to CCIR656 File Option ........................................................... 5 2.2.2.2 Video Input Source Option .................................................................... 6 2.2.2.3 Download a CCIR656 File to SDRAM and Display Option ................... 6 2.2.2.4 Download a CCIR656 File to Flash Option ........................................... 6 2.2.2.5 Display Video from Flash Option ........................................................... 6 2.2.2.6 Display Test Patterns Option ................................................................ 6 3. COMMAND LINE PARAMETERS ............................................................................................ 6 4. 3.3 V OR 5 V INTERFACE ........................................................................................................ 6 5. DIGITAL VIDEO INTERFACE .................................................................................................. 6 6. ANALOG OUTPUT ................................................................................................................... 6 7. OUTPUT FILTERS .................................................................................................................... 6
LIST OF FIGURES
Figure 1. CDB4954A/55A Evaluation Board Interface .................................................................... 5 Figure 2. Register Edit Box ............................................................................................................. 5 Figure 3. 300 Filters..................................................................................................................... 7 Figure 4. 75 Filters....................................................................................................................... 7 Figure 5. Digital Video Input ............................................................................................................ 9 Figure 6. FPGA ............................................................................................................................. 10 Figure 7. CS4954/5 ....................................................................................................................... 11 Figure 8. Microprocessor............................................................................................................... 12 Figure 9. Video Output Filters ....................................................................................................... 13 Figure 10. Power/RS232 Interface ................................................................................................ 14 Figure 11. Silkscreen Top ............................................................................................................. 15 Figure 12. Top Side....................................................................................................................... 16 Figure 13. Power Layer ................................................................................................................. 17 Figure 14. Ground Layer ............................................................................................................... 18 Figure 15. Bottom Side.................................................................................................................. 19
Contacting Cirrus Logic Support
For a complete listing of Direct Sales, Distributor, and Sales Representative contacts, visit the Cirrus Logic web site at: http://www.cirrus.com/corporate/contacts/
Microsoft, Windows 95, Windows 98, Windows 2000, and Windows NT are registered trademarks of Micosoft Corporation. IBM is a registered trademark of International Business Machines, Inc. Macrovision is a registered trademark of Macrovision Corporation. Preliminary product information describes products which are in production, but for which full characterization data is not yet available. Advance product information describes products which are in development and subject to development changes. Cirrus Logic, Inc. has made best efforts to ensure that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided "AS IS" without warranty of any kind (express or implied). No responsibility is assumed by Cirrus Logic, Inc. for the use of this information, nor for infringements of patents or other rights of third parties. This document is the property of Cirrus Logic, Inc. and implies no license under patents, copyrights, trademarks, or trade secrets. No part of this publication may be copied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photographic, or otherwise) without the prior written consent of Cirrus Logic, Inc. Items from any Cirrus Logic website or disk may be printed for use by the user. However, no part of the printout or electronic files may be copied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photographic, or otherwise) without the prior written consent of Cirrus Logic, Inc. The names of products of Cirrus Logic, Inc. or other vendors and suppliers appearing in this document may be trademarks or service marks of their respective owners which may be registered in some jurisdictions. A list of Cirrus Logic, Inc. trademarks and service marks can be found at http://www.cirrus.com.
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CDB4954A/55A
LIST OF TABLES
Table 1. System Connections ................................................................................................................ 7 Table 2. CBD4954 Jumper/Switch Settings........................................................................................... 7 Table 3. DIP Switch Settings ................................................................................................................. 8
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CDB4954A/55A
1. CDB4954A/55A SYSTEM OVERVIEW
The CDB4954A/55A Evaluation Board allows the CS4954/55 NTSC/PAL Digital Video Encoder ICs from Cirrus Logic to be evaluated with a variety of internal and external video signals. DIP switches on the evaluation board allow external serial or parallel video to drive the CS4954/55, display test patterns contained in the evaluation board's control FPGA, and display NTSC images stored in FLASH. When the CDB4954A/55A (Microsoft Windows95(R), Windows 98(R), Windows NT(R), and Windows 2000(R) compatible) software is used, bitmaps up to 720x480 pixels may be converted to CCIR656 PAL or NTSC files, downloaded to SDRAM on the evaluation board and played from SDRAM through the CS4954/55. In addition, NTSC CCIR656 files can be stored to FLASH memory on the evaluation board for later play back. The CDB4954A/55A board supports Composite, RGB and S-Video outputs simultaneously. The CDB4954A/55A has been partitioned into 6 schematics shown in Figure 5, Figure 6, Figure 7, Figure 8, Figure 9, and Figure 10. Notice that the partitioned schematics show the interconnections between the pages.
2.1
DIP Switch Options
If you use the CDB4954A/55A Evaluation Board without a PC (i.e. in the standalone mode), use the followings to set up the board using the 8 position dip switch. The dip switch positions are marked 18. The individual switches select these functions: Switches 1-4 select different operating modes. (Refer to Table 3 on page 8 for more information.) Switch 5 - Not Used Switch 6 - PAL/NTSC data format. Switch 7 - Pedestal Offset ON/OFF. Switch 8 - Clipping Input Signals ON/OFF.
2.2
Control Port Software
The CDB4954A/55A is shipped with Microsoft(R) Windows(R) based software for interfacing with the CS4954/55 via the DB9 connector, J26. This software allows the user to have complete access to the control registers of the CS4954/55, as well as the ability to access some features of the on-board FPGA. A comprehensive online Help is included.
2.2.1
Changing a CS4954/5 or FPGA Register
2. SETUP ACTIVITIES
Setup of the CDB4954A/55A is straightforward. DC Power is supplied to the board either via the supplied "wall wart" style power supply or by using the binding posts on the board (but not both!) When the board is powered, the Power In LED (D6) will illuminate. If you're planning to use the supplied software, you will need to copy the files on the distribution disk shipped with the evaluation board to your hard disk drive. You should use the supplied 9-pin serial cable to connect your IBM(R) PC (or compatible) to the 9-pin D-Sub connector (labeled J6, RS-232) on the CDB4954A/55A.
There are two ways to change the values of either CS4954/55 or FPGA registers. When a register check box is checked, the corresponding register bit is set to a "1". When unchecked, the bit is set to "0". The first approach, shown on Figure 1 on page 5, is to check or uncheck particular bit values in the desired register. For example, in Figure 1, the CONTROL_0 configuration register of the CS4954/55 is set for CCIR656 mode (CCIR656 check box checked) and for video input from V[7:0] (IN_MODE check box checked). In addition, the background color generated by the CS4954/55 is set to blue (BLUE1 and BLUE0 check boxes are checked). The second approach is to click the register label above any set of register check boxes. This brings up a dialog which is
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CDB4954A/55A
Figure 1. CDB4954A/55A Evaluation Board Interface
Figure 2. Register Edit Box
shown in Figure 2. You can directly enter the hex value for all bits in the register and click the OK button. This will set all bits at once. The new value will be reflected in the pattern of checks in the register check boxes and immediately downloaded to either the CS4954/55 or the FPGA.
be downloaded to the FLASH on the evaluation board for storage and later replay, or downloaded directly to SDRAM for immediate playing.
2.2.2.1
Convert to CCIR656 File Option
2.2.2
Actions Menu
If you use the CDB4954A/55A Evaluation Board with a PC, the Action Menu will allow you to convert bitmaps of up to 720x480 pixels to CCIR656 PAL or NTSC files. These converted files can then
This option converts a bitmap image (".bmp" file extension) of up to 720x480 into a CCIR656 NTSC (".nts" file extension) or PAL (".pal" file extension) file. This step is necessary before attempting to download either a NTSC or PAL image to SDRAM and displaying it. It is also necessary before saving an NTSC or PAL file to FLASH.
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CDB4954A/55A
2.2.2.2 Video Input Source Option
-f: This parameter shows the FPGA Register Values tab. This allows FPGA registers to be manipulated directly. Note that the FPGA Register is NOT part of the CS4954/55. -m: This parameter shows the Macrovision(R) Registers tabs if a CS4955 is in place on the CDB4954A/55A Evaluation Board. If a CS4954 is in place on the board, the Macrovision Registers tabs are not shown (since the CS4954 doesn't have Macrovision support) whether or not the "-m" command line parameter is included.
This option selects the video source which will serve as input for the CS4954/55. Internal Video means all video content which is supplied by the FPGA. External parallel inputs use J4, the 25 pin D-Sub connector. External serial inputs use J19, the right angle BNC connector.
2.2.2.3
Download a CCIR656 File to SDRAM and Display Option
This option downloads a previously converted bitmap file to SDRAM on the evaluation board and displays it on the video outputs. Either a NTSC or a PAL format file may be downloaded and displayed, but the monitor used must be compatible with the downloaded file format to display correctly.
4. 3.3 V OR 5 V INTERFACE
The CS4954 allows either 3.3 V or 5 V operation. The CDB4954A/55A evaluation board is built so that you can test this feature by changing jumper configurations. The voltage should only be changed when no power is applied. Please refer to Table 1 on page 7.
2.2.2.4
Download a CCIR656 File to Flash Option
5. DIGITAL VIDEO INTERFACE
The evaluation board is designed to accept the standard ITU-R BT.656 (i.e.: ECL) levels, but it also allows for TTL levels and SMPTE-259M serial digital interface to facilitate system development. Please refer to Table 2 on page 7 for a description of all the connectors located on the board.
This option downloads and stores a previously converted bitmap file to a block of on board Flash memory. FLASH block 1 is contains the Cirrus logo screen in NTSC format, while FLASH block 2 contains the Cirrus logo screen in PAL format.
2.2.2.5
Display Video from Flash Option
This option displays video from one of the 3 FLASH blocks.
6. ANALOG OUTPUT
Before connecting equipment such as a monitor to one of the analog video outputs, verify that the jumper configuration for the video connectors are properly set for your application.
2.2.2.6
Display Test Patterns Option
This option displays one of the eight test patterns generated by the control FPGA. These patterns are color bars, luma bars, step, aqua screen, luma ramp (1 bit/2 pixel ramp rate), luma ramp (1bit/pixel), luma ramp (2bits/pixel), and luma ramp (4bits/pixel).
7. OUTPUT FILTERS
The filters present on the evaluation board are calculated for both high impedance loads (doubly terminated 300 ) and low impedance loads (doubly terminated 75 ). Please note that when in low impedance mode, only 3 DACs may be enabled. Refer to Table 2 on page 7 for the proper configuration. Also, the CDB4954A/55A evaluation board allows for other filter topologies by providing an extra opamp with open pads. Please refer to Figure 9 for more detail.
3. COMMAND LINE PARAMETERS
There are two valid command line parameters which can be used to modify the action of the program.
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CDB4954A/55A
22 pF ENCODER DRIVER ENCODER
22 pF TO 75 LOAD
1.8 H 300
2.2 H 75
300
330pF 270pF
330 pF
270 pF
Figure 3. 300 Filters
Figure 4. 75 Filters
.
Connector J1 J4 J11 J12 J30 J14 J16 J19 J35 J26 Input/Output Input Input Output Output Output Output Output Input Input Input/Output Description 6 - 9V DC Power Supply 656 Parallel Video Input R Video Output G Video Output B Video Output Composite Video Output S-Video Output 656 Serial Video Input (-) 656 Serial Video Input (+) RS232 Interface
Table 1. System Connections
.
Header/Switch J2 J5 J7 J6 J8 J9 J10 J18 J28 J32 J33 Purpose Voltage Supply Select Output Test Point for Serial Receiver Phase Sensor Output FPGA Program/Debug Header Flash Write Enable Testpoint from FPGA External 1.2V Source for CS4954 MPU Debug Dig Video Input to CS4954 Processor Bus to CS4954 Jumper Position 3.3V 5V Jumpered Open Jumpered Open Function Selected 3.3 V Operation 5 V Operation Testpoints Testpoints Testpoints Write Enabled Write Not Enabled Testpoints 1.2 V Ex Source No 1.2 V Source Testpoints Testpoints Testpoints
Table 2. CBD4954 Jumper/Switch Settings
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CDB4954A/55A
J34 J3 J13 J15 J17 J20 J21 J22 J23 J24 J25 J27 J29 J31 S1 S2 GND Jumper for Dig Video Input High/Low Impedance Select Jumpered Open High Low Gnd Connected No Gnd Connect High Impedance Low Impedance
NOTE: All Jumpers must be in the same position, namely High or Low. Also, only change impedance loading with the power off.
DIP Switch for Stand Alone Mode Reset Switch
(See Table 3) -
(See Table 3) Resets the CDB4954A/55A
Table 2. CBD4954 Jumper/Switch Settings (Continued)
Switch 8 7
Purpose Clipping Input Signals Pedestal Offset
Position ON OFF ON OFF
Function Selected Clipping On Clipping Off (CS4954 Con Reg 6, bit 6) Pedestal Offset = 7.5 IRE Pedestal Offset = 0 IRE (CS4954 Con Reg 1, bit 1) PAL-B Mode NTSC-M Mode Display Color Bars (70% Amp, 70% Sat) Display Luma Bars (70% Amp, 70% Sat) Display a Luma Step Display an Aqua Screen Display a Luma Ramp (1 bit/2 pixels) Display a Luma Ramp (1 bit/ pixel) Display a Luma Ramp (2 bit/ pixel) Display a Luma Ramp (4 bit/ pixel) Select Parallel Video Input as External Source Select Serial Video Input as External Source Display Video from Flash Block 1 (Cirrus Logo - NTSC) Display Video from Flash Block 2 (Cirrus Logo - PAL) Display Video from Flash Block 3 Select the D656 Bus Header(J32) as external video input source.
6 5 1-4
NTSC/PAL Format Not Used Operating Modes NOTE: OFF = 0 ON = 1
ON OFF 0000 1000 0100 1100 0010 1010 0110 1110 0001 1001 0101 1101 0011 1011
Table 3. DIP Switch Settings
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CDB4954A/55A
Figure 5. Digital Video Input
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CDB4954A/55A
10
Figure 6. FPGA
CDB4954A/55A
Figure 7. CS4954/5
11
12
CDB4954A/55A
Figure 8. Microprocessor
CDB4954A/55A
Figure 9. Video Output Filters
13
14
CDB4954A/55A
Figure 10. Power/RS232 Interface
CDB4954A/55A
Figure 11. Silkscreen Top
15
16
CDB4954A/55A
Figure 12. Top Side
CDB4954A/55A
Figure 13. Power Layer
17
18
CDB4954A/55A
Figure 14. Ground Layer
CDB4954A/55A
Figure 15. Bottom Side
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