User’s Manual
SDA 55xx
TVTEXT PRO Evaluation Board
Version 1.2
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Revision History
Version no.
V1.0 Initial version June 21st 1999
V1.1 Circuit diagram updated July 5th 1999
V1.2 Chapter 1-5 added August 20th 1999
HISTORY DATE
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Table of contents
1. Introduction...............................................................................................................4
2. Features of the TVTEXT PRO Evaluation Board ......................................................4
3. Getting Started .........................................................................................................5
4. Hints for Operation....................................................................................................6
4.1. RGB Buffer Stage and TVTEXT PRO Design Step V0.1...............................6
4.2. COR/BLANK Decoder...................................................................................6
4.3. BLANK Signal and TVTEXT PRO Design Step V0.1.....................................6
4.4. 2.5V Power Supply and TVTEXT PRO Design Step V0.1 .............................7
5. Known Bugs of the TVTEXT PRO Evaluation Board.................................................8
5.1. Labelling of SW02, SW03 and SW04............................................................8
5.2. Voltage Level of H-Sync and Sandcastle Signal............................................ 8
5.3. Address Lines to SRAM................................................................................8
5.4. Floating Pin at FLASH Device.......................................................................9
5.5. Pull-up Resistor for In fra re d Receiver............................................................9
6. Circuit Diagram.........................................................................................................9
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1. Introduction
The TVTEXT PRO Evaluation Board is a versatile tool, providing you quick access to the capabilities
of TVTEXT PRO’s powerful architecture.
To enable applications to be developed quickly and easily the TVTEXT PRO Evaluation Board is fitted
with a variety of peripherals for connections to the outside word.
2. Features of the TVTEXT PRO Evaluation Board
• CPU: - TVTEXT PRO in open top socket (MQFP100 package)
• MEMORY: - EPROM/FLASH up to 512k x 8 (PLCC32 package)
- SRAM 512k x 8 (SO32 package)
- NV-Memory (DIP8 package, I2C controlled)
• CLOCK: - 6 MHz crystal
• INTERFACES: - Serial int erface for RS-232 (RS232 connector, DB9)
- TV interface for display (SCART connector, SCART)
- Signal interface for Full Data Service Slicer (CVBS connector, BNC)
- Multifunctional interface for extension (Universal connector, 96pin)
- Oscillator interface for timing analyses (Oscillator connector, SMB)
- Memory interface for logic analyses (LA connector, Mictor)
• POWER: - external stable 5V and 12V
- generated internally 3.3V, 2,5V (adjustable)
• MODULES: - Infrared receiver for IR remote control
- Sync separator for generating H- and V-sync
• DIMENSIONS: - Euro format 100 mm x 160 mm
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3. Getting Started
The following table gives an overview on all jumper and switches of the TVTEXT PRO Evaluation
Board. The setting recommended in the last column is used for operation with ext. ROM, e.g. for
running the demo software P090VXXX and a television connected via the SCART connector.
Jumper Description if Jumper is set SETTING
J01 Apply regulated 3.3V power supply to whole board YES
J02 B: BLANK signal from COR/BLANK-Decoder
A: Buffered BLANK signal
J03 Connect RS232-Interface Driver (RxD0) to TVTEXT PRO don’t care
J04 Connect RS232-Interface Driver (TxD0) to TVTEXT PRO don’t care
J05 Apply regulated 2.5V power supply to whole board YES
J06 Apply 10uF capacitor to reset pin. YES
J07 Use external clock applied to X09 (remove crystal) NO
J08 Connect WR# signal to 96-pin Universal connector NO
J09 Connect RD# signal to 96-pin Universal connector NO
J10 Connect PSEN signal to 96-pin Universal connector NO
J11 Connect ALE signal to 96-pin Universal connector NO
J12 Connect A19 to connector X10 don’t care
J13 Connect A18 to connector X10 and memories YES
J14 Connect A18 to connector X10 and memories YES
J15 Connect P3.4/SDA to NV-Memory YES
J16 Connect P3.2/SCL to NV-Memory YES
J17 Connect V-sync to TVTEXT PRO (not needed if Sandcastle is
used)
J18 Connect infrared receiver to TVTEXT PRO YES
J19 Pull EXTIF pin of TVTEXT PRO down to GND YES
J20 Connect A15 to chip select of SRAM NO
J21 Pull Enable# pin of ROM device down to GND YES
J22 Pull XROM pin of TVTEXT PRO down to GND YES
SW2 Selection of CVBS source for the sync separator:
BNC connector or SCART connector
SW3 Selection of CVBS source for TVTEXT PRO’s slicer:
BNC connector or SCART connector
SW4 selection of sync source for the HS/SC input pin:
Sandcastle (SSC) or H-sync
Position A
NO
Position
CVBS-SCART
Position
CVBS-SCART
Position
*
SSC
*
*
*
Note: The labelling of SW2, SW3 and SW4 has been interchanged. If revision B004-V001 of the
TVTEXT PRO Evaluation Board is used, select the other jumper position to get the desired setting.
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4. Hints for Operation
4.1. RGB Buffer Stage and TVTEXT PRO Design Step V0.1
The RGB buffer stage of the TVTEXT PRO Evaluation Board is designed for the specified RGB
voltage offset of 0.3V and a gain adjustment of 1.2V. Due to a bug (see Errata Sheet V1.0, H8) in the
DAC module of the first test chip of TVTEXT PRO (V0.1) the RGB buffer stage of the TVTEXT PROEvaluation Board is not working well. Colour will not be displayed correctly. Especially if the board is
used together with TEDIpro (OSD and Font Editor) and the first design step of TVTEXT PRO (V0.1)
the RGB buffer stage should be reworked to get the right colours at the SCART connector.
TVTpro A11 or later TVTpro V0.1
100
+3.3V
68
47
200
+5.0V
100
75
4.2. COR/BLANK Decoder
The COR/BLANK decoder circuit is used to separate the BLANK signal and the COR signal (contrast
reduction) out of the combined COR/BLANK signal provided by the TVTEXT PRO. The on-board
COR/BLANK decoder connected to pin 60 (MQFP100 package) of the TVTEXT PRO as shown in the
circuit diagram cannot be used, because it is working much to slow. Furthermore the COR function of
the TVTEXT PRO in the first test chip V0.1 is not working (see Errata Sheet V1.0, H2).
4.3. BLANK Signal and TVTEXT PRO Design Step V0.1
Due to a malfunction of the BLANK pin (TVTEXT PRO Errata V1.0, H2) an external pull-up resistor is
required to generate the BLANK high level if TVTEXT PRO design step V0.1 is used. This resistor
(200 Ohms) is already applied in all Evaluation Boards with TVTEXT PRO samples design step V0.1.
This resistor must be removed if other design steps of TVTEXT PRO than V0.1 are used.
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4.4. 2.5V Power Supply and TVTEXT PRO Design Step V0.1
Due to a short between the 3.3V and 2.5V power domain on-chip of the TVTEXT PRO V0.1 (see
Errata Sheet V1.0, H11) the 2.5V voltage on-board is increased. This can be avoided by
disconnecting the 3.3V power from pin 40 (MQFP100 package) and connecting 2.5V to this pin. Doing
this will also decrease the output voltage of Port 3 and Port 4.2-3 to 2.5V. This should only be done if
accurately converted values of the ADC modules are needed or the slicer performance is measured.
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5. Known Bugs of the TVTEXT PRO Evaluation Board
5.1. Labelling of SW02, SW03 and SW04
The labelling of the switches SW02, SW03 and SW04 is inverted.
SW02 (selection of CVBS source for the Slicer):
If the jumper is set to ‘CVBS-BNC’ the slicer is supplied with the CVBS signal from the SCART
connector. If the jumper is set to ‘SCART’ the slicer is supplied with the CVBS signal from the BNC
connector.
SW03 (selection of CVBS source for the sync separator):
If the jumper is set to ‘CVBS-BNC’ the sync separator is supplied with the CVBS signal from the
SCART connector. If the jumper is set to ‘SCART’ the sync separator is supplied with the CVBS
signal from the BNC connector.
SW04 (selection of sync source for the HS/SC input pin):
If the jumper is set to ‘SSC’ the HS/SC input pin of the TVTEXT PRO is supplied with the H-sync
signal from the sync separator. If the jumper is set to ‘HSYNC’ the HS/ SC input pin of the TVTEXT
PRO is supplied with the Sandcastle signal from the sync separator.
5.2. Voltage Level of H-Sync and Sandcastle Signal
The horizontal synchronisation signal (H-sync) or Sandcastle signal connected to pin 29 (MQFP100
package) of the TVTEXT PRO may not exceed a voltage level of 2.5V. Some boards delivered in the
first weeks could have a wrong H-sync/sandcastle level. This will cause disturbance on the 2.5V
power domain and can influence the slicer performance. Hence we recommend to decrease the level
of the H-sync and Sandcastle signal to max. 2.5V. Therefore the hot end of R40 and R43 must be
disconnected from the 3.3V power domain and connected to 2.5V power supply. R41 has to be
replaced by a 2k7 Ohm resistor.
5.3. Address Lines to SRAM
Some address lines between TVTEXT PRO and SRAM are connected in a wrong way. Following
address lines have to be connect as follow (only used for more than 10 page acquisition software):
Pin of
TVTEXT PRO
A16 A15
A17 A16
A18 A17
A19 A18
Pin of SRAM
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5.4. Floating Pin at FLASH Device
Pin 31 of IC05 (W# pin of Flash ROM) must be pulled high (to 3.3V) permanently by a resistor (100
kOhm) or short connection to 3.3V. Otherwise the Flash device is not working stable. Most boards are
already delivered with a 100-kOhm pull-up resistor.
5.5. Pull-up Resistor for Infrared Receiver
The output of the on-board infrared receiver needs a 2k7 Ohm pull-up resistor connected to 3.3V for
correct operation. This resistor is already drawn in the circuit diagram (R34) but there is no position on
the PCB. Most boards are already delivered with a pull-up resistor.
6. Circuit Diagram
(See next page)
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