Texas Instruments PanelBus TFP201EVM User manual

PanelBus  TFP201EVM
September 2000 Mixed-Signal Products
User’s Guide
SLDU001

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Copyright 2000, Texas Instruments Incorporated

Information About Cautions and Warnings
iii
Read This First
Preface
Read This First
About This Manual
This user’s guide describes the characteristics, operation, and use of the
PanelBusTFP201 evaluation module (EVM) kit.
How to Use This Manual
This document contains the following chapters:
- Chapter 1 – Overview
- Chapter 2 – Physical Description
- Chapter 3 – Circuit Description
Information About Cautions and Warnings
This book may contain cautions and warnings.
This is an example of a caution statement.
A caution statement describes a situation that could potentially
damage your software or equipment.
This is an example of a warning statement.
A warning statement describes a situation that could potentially
cause harm to you.
The information in a caution or a warning is provided for your protection.
Please read each caution and warning carefully.

Trademarks
iv
Related Documentation From Texas Instruments
ToobtainacopyofanyofthefollowingTIdocuments,calltheTexasInstrument
Literature Response Center at [phone] or Product Information Center
(PIC) at [phone]. When ordering, identify the literature by its title and
literature number if possible.
Data Sheets:
- TFP201 Literature No. SLDS116
- TFP6422, TFP6424 Literature No. SLDS118
Trademarks
TI is a trademark of Texas Instruments.
PanelBus is a trademark of Texas Instruments.

Running Title—Attribute Reference
v
Chapter Title—Attribute Reference
Contents
1 Overview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Purpose 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 EVM Basic Function 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 TFP201 EVM Board Configuration and Operation 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.1 Power Supply 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.2 High-Speed Data Line Probe Point 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.3 Impedance Matching 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.4 Transmitter Voltage Swing 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.5 Jumper Configuration 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.6 Switch 1 Configuration 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.7 Switch 2 Configuration 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Physical Description 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 TVP201 EVM Board Diagram 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Component List 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Schematics 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Running Title—Attribute Reference
vi
Figures
3–1 TFP201 Receiver Schematic 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–2 Transmitter Schematic 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–3 Power Supply Decoupling Schematic 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables
1–1 Default PDO Jumper Configuration 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–2 Default Power Supply Jumper Configuration 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–3 Default TFP201 EVM Switch 1 Configuration 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–4 Default TFP201 EVM Switch 2 Configuration 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–1 TFP201 EVM Bill of Materials 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1
Overview
Overview
This chapter gives a general overview of the TFP201 evaluation module
(EVM),anddescribessomeofthefactorsthatmustbeconsideredinusingthis
module.
Topic Page
1.1 Purpose 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 EVM Evaluation Function 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 TFP201 EVM Board Configuration and Operation 1-3. . . . . . . . . . . . . . . .
Chapter 1

Purpose
1-2
1.1 Purpose
The TFP201 EVM can be used to evaluate the TFP201 performance and de-
vice parameters, while acting as a guide for high-speed board layout. The
board allows the designer the ease of connecting directly from the output of
an existing system to the input of the flat panel display through a DVI connec-
tor. The board receives encoded serial data sent over three differential pairs
and one clock signal over a fourth differential pair that deserializes the data.
Parallel data and a clock signal are provided to an onboard transmitter, which
reserializes the data and the outputs to the connector, and then sends to the
digital connector of the display.
1.2 EVM Basic Function
The Texas Instruments TFP201 EVM kit is used to evaluate the performance
and design of the TFP201 using an existing system with a DVI interface. The
boardallowsthe designer to connect toavideo card where the dataandclock
are serialized and transmitted along four differential pairs. The receiver then
deserializesthedata,providing24bits(48bitsin2pix/clk)ofdataandaclock.
The receiver than sends the data to an onboard transmitter that reserializes
thedataandoutputsthefourdifferentialpairsthroughtheDVIconnectortothe
display. The TFP201EVM will support up to SXGA resolutions.
Overall,theboardisdesignedandoptimizedtosupporthigh-speedoperation.
In general, the board impedance should be controlled to 50 Ωandimpedance
mismatches should be kept to a minimum by designing the component pad
sizetobeascloseaspossibletothewidthoftheconnectingtransmissionline.
Inaddition, to reduce boardskew, tracelengths should be matchedasclosely
as possible.
Some features offered by this board include:
- PCB and DVI cable are designed for high-speed signal integrity.
- The PCB can be configured for additional power supply options.
- All input/output signals are accessible.
PC Tx Digital CRT / FPD
TFP201
EVM
3.3 V
Supply

TFP201 EVM Board Configuration and Operation
1-3
Overview
1.3 TFP201 EVM Board Configuration and Operation
TheTFP201EVMboardissimpletouse,requiringonlyafewstepstooperate:
1) Connect power supply GND and 3.3 V VCC.
2) Connect DVI input cable from PC (typically 2–3M cable).
3) Connect DVI output cable to monitor (typically 2–3M cable).
4) Power on the supply.
The TFP201 EVM board has various options for different modes of operation,
selectable by jumpers and switches. When shipped, the board is fully opera-
tional and all jumpers are in the default positions.
Note:
When handling board, ESD protection is needed.
1.3.1 Power Supply
A 3.3-V dc power supply is needed to operate the TFP201 EVM. This board
is designed for use with one or two power supplies. Two supplies can be used
ifthereisadesiretoseparatepowertotheTFP201fromtheonboardtransmit-
ter. If two supplies are used, jumper P14 must be removed; if one supply is
used, P14 must be connected. The default configuration is jumper P14 on.
1.3.2 High-Speed Data Line Probe Point
The high-speed data lines can be monitored on an oscilloscope via the SMA
connectors on the TFP201 EVM. Each data line has a 1-kΩresistor in series
with the SMA connector. This creates a 21:1 test probe point; thus the signal
is attenuated by a factor of 21. This 21:1 probe point is used to compensate
for rise time degradation through scope probes.
1.3.3 Impedance Matching
TheTMDS inputs to the TFP201 Receiver have a fixed signal-ended termina-
tion to AVDD. The TFP201 is internally optimized using a laser trim process
to precisely fix the impedance at 50 Ω. The device will function normally with
or without a resistor on the EXT_RES terminal. The fixed impedance elimi-
nates the need for an external resistor while providing optimum impedance
matching to standard 50 ΩDVI cables.
1.3.4 Transmitter Voltage Swing
The voltage swing on the transmitter can be adjusted via resistor R21. The
voltage swing can be adjusted depending on the length of the cable being
used. The larger the voltage swing, the better the signal to noise ratio.
1.3.5 Jumper Configuration
Table 1–1 and Table 1–2 reflect the default configuration of jumpers on the
TFP201 EVM board.

TFP201 EVM Board Configuration and Operation
1-4
Table 1–1.Default PDO Jumper Configuration
Designator Function Condition
P19 Jumper SCDT to PDO Off
P20 Jumper PDO to SW1 On
Table 1–2.Default Power Supply Jumper Configuration
Designator Function Condition
P14 Jumper Vcc1 to Vcc2 On
P6 Jumper Vcc1 to PVCC On
P7 Jumper Vcc1 to AVCC On
P8 Jumper Vcc1 to OVCC On
P13 Jumper Vcc1 to DVCC On
P9 Jumper Vcc2 to IVCC On
P10 Jumper Vcc2 to PVCC1 On
P11 Jumper Vcc2 to VCC On
P12 Jumper Vcc2 to AVCC_tx On
Note: Power supply jumpers should only be removed and replaced with power turned off.
Power supply supply jumpers can be removed to monitor individual supply currents.
1.3.6 Switch 1 Configuration
Table 1–3 reflects the default configuration of Switch 1 on the TFP201 EVM
board to operate the TFP201 in normal mode. Refer to the data sheet for
specific terminal functions.
Table 1–3.Default TFP201 EVM Switch 1 Configuration
Designator Function Condition
1TFP201 RSVD Off (high)
2TFP201 STAG select Off (high)
3TFP201 DFO select On (low)
4TFP201 PIXS On (low)
5TFP201 ST Off (high)
6TFP201 OCK_INV select On (low)
7TFP201 PD select Off (high)
8TFP201 PDO select Off (high)