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Techwell,Inc.
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TW9906/TW9909 Evaluation Board User's Manual
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(Rev 1.0)
Techwell, Inc. 408 Plumeria Drive San Jose, CA 95134 URL http://www.techwellinc.com
TW9906/TW9909 Evaluation Board
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Disclaimer This document provides technical information for the user. Techwell, Inc. reserves the right to modify the information in this document as necessary. The customer should make sure that they have the most recent data sheet version. Techwell Inc. holds no responsibility for any errors that may appear in this document. Customers should take appropriate action to ensure their use of the products does not infringe upon any patents. Techwell Inc. respects valid patent rights of third parties and does not infringe upon or assist others to infringe upon such rights. 1
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Techwell,Inc. 1. Overview
TW9906/TW9909 Evaluation Board User's Manual
TW9906 and TW9909 are high quality NTSC, PAL, and SECAM multi-standard video decoder plus RGB mixing for multimedia applications. The TW9906/TW9909 evaluation board can demonstrate most of the decoder's features and allows easy evaluation of the TW9906, TW9909 performance. Features such as Scaling and Cropping can be easily examined by modifying a few register setting, switching input and output path can also be changed by a single click of the mouse. The evaluation board is controlled via a RS-232 serial interface cable from a PC, and an application software namely SerCon. User can also use a terminal emulator such as Hyper-terminal, all registers can be manually modified. With TW9909, an OSD menu is also available, together with on-board push buttons, changing register settings and other features without the need of a PC. In order to truly explore the capability and performance of the TW9906/TW9909, user is strongly recommended to use component output (from DAC, default setting). The main signal flow of the evaluation board is depicted below.
Input connectors
Decoder TW9906 or TW9909
FPGA and SDRAM
DAC or Encoder
Output connectors
2. TW9906_9 Evaluation Board Features
2.1. Input/output On the board there are CVBS/S-video/Component/SCART input connectors connected to decoder inputs and CVBS/S-Video/Component output connectors connected to the signals from DAC or the encoder. Use JP3, JP4, JP5 to select the component outputs between DAC and the encoder. Default output is from the DAC. CVBS/S-video output is always from the encoder.
INPUTS: CVBS S-VIDEO Components (YPbPr) SCART OUTPUTS: CVBS S-VIDEO *Components (YPbPr or RGB) CSYNC *Recommended feature for evaluation
CONNECTORS CON1 CON4 Y/G:CON1, Pb/B:CON2, Pr/R:CON3 CON5 CONNECTORS CON13 CON12 Y/G: CON9, Pb/B: CON10, Pr/R:CON11 CON8
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2.2. Downscaling
TW9906/TW9909 Evaluation Board User's Manual
With frame buffer memory turned on, user can see the scaled down image by adjusting register 0x0D, 0x0E and 0x0F. Tips: by only adjusting 0x0E from the default of minimum value of 0x11 to 0x22 or 0x33, the scaling effect can be seen immediately. 2.3. VIP (Video Interface Port), and Headers Header JP1 signals are compatible to VIP standard. User can hook up JP1 to a VGA VIP header with a flat cable (not included). 2.4. Closed-Caption Closed-Caption is supported by Z86129. 2.5. LLC (Line-Locked Clock) / Free-run clock mode In order to avoid output jitter when using Component output thru the DAC, user must turn on the LLC function, and choose Direct Pass mode (turn off the Frame Buffering feature from the board). To turn on LLC mode, Dip switch S1 position 4 must flip to off position (default). Register 0x03 bit 5, LLCMODE set to 1. All above settings are default. When use composite output thru encoder (CVBS or S-Video), user can Free-Run mode (LLC off). In Free-Run clock mode, frame buffer must be turned on to remove the output jitter. 2.6. OSD (On Screen Display) OSD feature is available only with TW9909. This feature can be activated by pressing the menu buttons, and must set slide switch S12 accordingly to match input source. 2.7. Function of the on-board FPGA (U5) As a SDRAM (frame buffer) controller, is mainly for providing buffering for decoder's scaling function as well as removing jitter when the board is in the Free-run clock mode. As a format converter, the FPGA de-multiplex 10-bit, 27MHz clocked ITU-R656 4:2:2 data from decoder into component Y,U,V and feed to triple 10-bit video DAC (U10 AD7123), the output from DAC is component Y/Pr/Pb or R/G/B. The FPGA interfaces to the Encoder in 10-bit mode. In bypass mode, data can feed through the FPGA from decoder directly to encoder. It also generates other synchronous signal in Free-run clock mode for frame buffered signal and to Encoder. A 2-wire Serial interface is used for communication between Microcontroller and the FPGA. LEDs are also controlled by the FPGA.
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3. Input/output connectors Location
VIP Header DAC/Encoder selector
Inputs
Outputs
CVBS / Y
CVBS/Y/G Pb / Blue Pr / Red S-Video
S-Video Pr / Red Y / Green Pb / Blue CSync
SCART
RS-232
Power 9VDC
User Button
Dip-switch
Reset
LEDs
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TW9906/TW9909 Evaluation Board User's Manual
DC power adaptor is included in the kit, or use any 7~9V/1.5A DC adaptor with center + plug.
5. Dip-switch settings
There are board options user can set by the Dip-switches S1.
Switch Function description
1 2 3 Reserved Reserved Auto Register Set mode ON (default), some registers are changed automatically by the Microcontroller, such as automatically detect video input (color system, interlace, etc). Manual mode: User controls all board function via RS232 Serial Interface. OFF: LLC(default), ON: Free-run clock, When using component output video signal, must set LLC mode. Refer to LLC/Free-run section for detail. Reserved FPGA programming loading M2 FPGA programming loading M1 FPGA programming loading M0
Default pos OFF OFF OFF ON OFF OFF OFF or ON OFF ON
4 5 6 7 8
6. Slide Switch
Slide switch S12 is for OSD selection for CVBS/Component and SCART. This switch must set accordingly to match the source of input for OSD to properly function.
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JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP8 JP9 JP10 JP11 JP12 JP13 JP14,15,16 JP17 JP18
TW9906/TW9909 Evaluation Board User's Manual Function
VIP standard compatible output header Power down (TW9906/TW9909 ) Pr Component output select from DAC or Encoder Y Component output select from DAC or Encoder Pb Component output select from DAC or Encoder Select sync from FPGA or Decoder for VS Select sync from FPGA or Decoder for HS JTAG port for CPLD Programming port CPLD test header Microcontroller test header 2-wire serial interface signal Boot jumper for Microcontroller firmware download when jumped Not applicable Select sync from FPGA or Decoder for CSYNC Audio Clock Signal
8. User Push Button
There are 8 push buttons on the evaluation board.
Button Name
S2 S3 *S4 *S5 S6 RESET MODE DOWN UP SEL
Function
System reset, reset the on-board 8051 Microcontroller Short cut to Function Demo function (LLC, DAC, ENC) Select or Enter the highlighted menu item in red Move to upper menu Input select: CVBS(default) -> S-Video -> component -> SCART(TW9909) -> CVBS. If being held down for >2s, LED T2 will be on indicating Caption is on. *S7 LEFT Scroll down, decrement index or register address *S8 MENU Main Menu *S9 RIGHT Scroll up, increment index or register address *Function only available in TW9909 with OSD feature for menu accessing.
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Techwell,Inc. 9. Menu Map
TW9906/TW9909 Evaluation Board User's Manual
The menu system is accessible through the 5 buttons stated in the User Push Button section. The OSD feature for this menu system is only available in TW9909 and not available in TW9906. On top of the 5 push buttons, there are 2 more short cut buttons that can immediately lead to the frequently used functions such as Video inputs (S6) and Demo Functions (S3). All these push buttons are functional on both TW9906 and TW9909, except that with TW9906, user has to shoot in the dark when traversing the menu using these buttons.
Menu Video In/Out... Composite In S-Video In Component In SCART In S-Video Out Decoder Encoder FPGA Composite Horizontal Vertical Caption LLC Mode DAC Output Mode ENC Output Mode Reset... Help... Escape ON OFF ON OFF ON OFF Direct Pass Frame Buffering Frame Buffering Direct Pass
Component Out S-Video Out Register Status Register Status Register Setting Register Setting
Register Set...
Scaling...
Function Demo...
Button Name
S8 S5 S4 S9 S7 MENU UP DOWN RIGHT LEFT
Function
Main Menu Move to upper menu Select or Enter the highlighted menu item in red Scroll up, increment index or register address Scroll down, decrement index or register address
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Power Done CPLD T1 T2 T3 T4
TW9906/TW9909 Evaluation Board User's Manual Function indicated when LED on
Power on FPGA loading fail Reserved PAL mode on Caption mode on Reserved Reserved
11. How to control the TW9906_9 registers
Note: If the Auto Mode is on (position 3 of Dip Switch S1 is set to off), the on-board Microcontroller continues checking the decoder status and changes registers when weak/bad signals occur such as VCR Playing FF, Fast Rewind, noisy TV, etc. It also automatically detects color system. User may want to turn off this function when manually changing registers. Turn `ON' the Dip-switch3. This will stop the auto compensation feature. There are two ways to adjust the register of the TW9906 and TW9909 on the TW9906/TW9909 evaluation board. First method is using the on-board push buttons, second method is using a PC via the RS232 serial port. 11.1. Using Push Buttons When using push buttons, it is best with TW9909 where OSD feature is available. Even though these buttons are functional under TW9906, due to lack of the OSD feature, it is hard for user to control the board functions. Follow the menu map in previous section to traverse the menu item and adjust the register content by using the Left (S7) and Right (S9) button, or use these 2 buttons to scroll up and down among menu items. Use the Down (S4) button to enter lower level menu or select the highlighted item (in red). Use Up (S5) button to move up one level from the current menu. 11.2. Using PC Serial port When using a PC to control, there are 2 ways. First, user can use the HyperTerminal command line style to control. Second, use the Serial Controller application which is a user friendly application with Graphical User Interface (supplied by TechWell). Using PC to control requires that a null-modem cable between PC serial port and the board serial port. The nullmodem cable is provided with the board.
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11.2.1. Null Modem Cable
TW9906/TW9909 Evaluation Board User's Manual
If a null-modem cable is not available, user can build one with the connections as follows. 9 PIN D-SUB FEMALE
Receive Data [2] Transmit Data [3] Data Terminal Ready [4] System Ground [5] Data Set Ready + Carrier Detect [6]+[1] Request to Send [7] Clear to Send [8]
9 PIN D-SUB FEMALE.
[3] Transmit Data [2] Receive Data [6]+[1] Data Set Ready + Carrier Detect [5] System Ground [4] Data Terminal Ready [8] Clear to Send [7] Request to Send
Null Modem Cable from PC Serial Port connected to here.
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11.2.2. Set up and Use the Hyper Terminal to Control the Board Follow these steps to create a Hyper Terminal control short cut Select "Hyper Terminal"
Connection Description
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Choose COM port.
TW9906/TW9909 Evaluation Board User's Manual
Set the COM port properties. Those should be 57600bps, 8 data, No parity, 1 stop, No flow control.
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TW9906/TW9909 Evaluation Board User's Manual
Set line delay :10~30ms, Note: if there is check sum error during firmware download, user may need to adjust this value. Character delay:0ms. Select [File\Properties\Settings\ASCII Setup..\]. It is required when user download new firmware.
Type [Enter] and see if it works.
The command prompt will be displayed.
[88]>
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11.2.2.1.
TW9906/TW9909 Evaluation Board User's Manual
Basic Command Set and Control Example via the Hyper Terminal
Type H or ? at the command prompt will display the available command set.
Examples. Change address [88]>C 28 Address : 28 [28]> Dump registers [88]>d 0 Read [Adrs:88h,00h] 50h Read [Adrs:88h,01h] 93h Read [Adrs:88h,02h] 41h Read [Adrs:88h,03h] A2h Read [Adrs:88h,04h] 00h Read [Adrs:88h,05h] 81h Read [Adrs:88h,06h] 00h Read [Adrs:88h,07h] 12h [88]> Read register [88]>r 2 Read [Adrs:88h,02h] 68h [88]> Write register [88]>w 2 41 Write 41h to [Adrs(88h)Index(02h)] Read [Adrs:88h,02h] 41h [88]>
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TW9906, 09: 0x88 Z89129 : 0x28 ADV9174 : 0x54 Example [88]>C 54 [54]>
TW9906/TW9909 Evaluation Board User's Manual
// User can change the address to 0x8A, by swap R39, R40 resisters
Changing 2 wire serial bus slave device address.
// change slave address to ADV9174 // Now user can access registers in ADV9174
How to test the down-scaling. To evaluate down-scaling performance, just change scaling registers(0x0d, 0x0e, 0x0f). Example) [88]>W e 22 // 1/4 size [88]>W e 33 // 1/9 size [88]>W e 44 // 1/16 size [88]>W e 11 // full size
11.2.2.2.
Down Load new Firmware to TW9906/TW9909
Warning: This procedure could erase the firmware, if not handle correctly, the board will not work. Connect serial cable to host PC, and start Hyper Terminal. Make sure Hyper Terminal settings are: COM port properties: 57600bps, 8 data, No parity, 1 stop, No flow control. Line delay : 30~10ms, Character delay : 0ms Put a jumper at J13 next to reset push button. loader screen will show up. Power On or Press {Reset}. The boot
Type `Y', the following message will be seen,
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TW9906/TW9909 Evaluation Board User's Manual
Click Hyper Terminal menu [Transfer\Send Text File..] Select the HEX file to be downloaded. Click Open Button and downloading will begin.
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Firmware is being downloaded
TW9906/TW9909 Evaluation Board User's Manual
Programming completed.
Follow the on screen instruction, and recycle the board power, then the board will run with new firmware.
11.2.3. Install and Use the Serial Control application 11.2.3.1. Install the Serial Control application
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The SerCon application can be downloaded from the Techwell Website. Download the application software in a compressed file SerCon170.zip. Unzip it to a local folder and install it. During the installation, if it asks for the serial number, user can type in 000. After installation is done, the following icon will be found under the program application. User can copy the short cut to the desk top. Following is the icon.
Sercon.lnk
Detail instruction on how to use the SerCon, please refer to document "Instruction of Serial Controller1216.pdf." The SerCon program also has command line input option for those who prefer using command line input. This can be done by typing in the command in the command box in the bottom of the SerCon GUI. 11.2.3.2. Use SerCon to control registers and board features.
Turn on the power of the board, plug in the serial cable, and make sure JP13 is open. Execute the SerCon program, the following will display.
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TW9906/TW9909 Evaluation Board User's Manual
Select device TW9906 or TW9909 from the device box, and check the box before the word Display (right under P2). Click on P1, P2 and P1 again. The following screen will be seen with current register content. Hit the Reset button, pay attention to the Message Viewer, there are message scroll up quickly.
Now user can change any register content and will see the resulting effect in real time. Example 1: Scaling: change the content of Register 0Eh, from 11 to 22, the screen will be scaled downed. Example 2: Change Brightness. Register 10h, change content to 7F maximum brightness, or 80 to minimum. User can explore other register following the datasheet. Note that when placing the mouse cursor over the register in the SerCon graphical interface, the name of that register will pop up.
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TW9906/TW9909 Evaluation Board User's Manual
Some frequently used features can be changed quickly by using the test menu. Click on T6 from the menu bar (for TW9906 and 09)
The test menu will show up. User can click on the radio button to change the board features such as decoder mode, encoder mode, LLC, DAC output mode, RTC mode, Progressive mode, etc.
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11.2.3.3.
TW9906/TW9909 Evaluation Board User's Manual
Down Load Firmware to on board Microcontroller Make sure JP13 boot jumper is short, and Display ON is checked. Push Reset button.
Type `Y' in the Command box after received message from the message viewer.
When the erase is done the following screen will disply.
Click on "Send" button from the menu bar
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TW9906/TW9909 Evaluation Board User's Manual
Click on "Browse" and select the hex file to be down loaded.
Select the newest hex file, and click open, the download will begin.
Down Load In progress.
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Download completed, click OK, remove JP13 jumper, and recycle the power.
11.2.3.4.
Down Load Firmware to on board FPGA
Set dip switch S1 pos 6, 7 and 8 respectively M2, M1, M0 to OFF. Recycle the power. Click "Flie Add" from menu tool bar.
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TW9906/TW9909 Evaluation Board User's Manual
Click on "Browse" from the File Merger and Loader window.
Choose "bit" file from open window.
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TW9906/TW9909 Evaluation Board User's Manual
Downloading in progress
The ending screen is shown as follow
Set dip switch pos 6, 7, 8 back to ON OFF ON or OFF OFF ON respectively. Recycle the power, the board's FPGA firmware is updated.
12. Revision History
Version 0 1.0 Date 01/21/2005 3/08/2005 Revision history Initial release Update and add details. By Brian An Albert Au
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