MAX3815EVKIT-DVI Maxim Integrated, MAX3815EVKIT-DVI Datasheet - Page 2

• Manufacturer Part Number: MAX3815EVKIT-DVI
• Description: Video ICs MAX3815 Evaluation Kit for DVI Cables
• Manufacturer: Maxim Integrated

MAX3815 Evaluation Kit for DVI Cables
For evaluation of the MAX3815, configure the evaluation
kit as follows:
1)
2)
3)
4)
Table 1. Adjustment and Control Descriptions (see Quick Start)
2
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COMPONENT
If power is supplied to the MAX3815 through the
battery pack, place two AA batteries in the battery
holder and place a shunt on the bottom two pins of
JU1.
If power is supplied by an external source, set the
power supply’s current limit to 300mA and connect
+3.3V at J3 and ground at J4. Then place a shunt on
the top two pins of JU1.
If no cable is attached at J2 (INPUT FROM CABLE),
the red LED at D1 should be illuminated (CLK LOSS).
This indicates that no clock signal is being detected
by the MAX3815. If the LED does not illuminate and
no cable is attached at J2, check to make sure the
batteries are getting proper contact. Alternatively, if
external power is used, ensure that it is supplying
+3.3V.
Set the equalizer to automatic equalization by
switching SW4 to AUTO.
SW2
SW4
JU1
JU3
JU4
R12
SB1
SB2
SB3
SB4
D1
J3
J4
DDC Ground Return
MANUAL EQ SET
MAX3816 VDD
EQ CONTROL
OUTLEVEL
CLK LOSS
SQUELCH
DRVR_EN
MAX3816
CPL_EN
POWER
NAME
+3.3V
GND
This LED turns on when the MAX3815 does not detect clock signal.
External power-supply positive connection.
External power-supply ground connection.
Placing a shunt across the top two pins connects the MAX3815 to the supply connectors J3
and J4 so an external power supply can be used. Place a shunt across the bottom two pins
to supply the MAX3815 from the battery pack (requires two AA batteries).
For future functionality.
For future functionality.
When manual control of the equalizer has been selected using SW4, the level of equalization
can be controlled using R12. Turning the potentiometer clockwise increases the amount of
equalization applied to the input signal. The voltage at EQ CONTROL can be measured at
TP3.
Short SB1 with solder to squelch the outputs when no clock signal is detected.
Short SB2 with solder to set the outputs to transmit one-half normal amplitude signals
(500mV P-P differential).
For future functionality.
To connect the display-side DDC return ground to the cable-side DDC return ground, short
the left two pads of SB4. To connect the display-side DDC return ground to the EV kit ground
short the right two pads of SB4.
For future functionality. This switch is replaced by two 0Ω resistors that set the DDC clock
and data signals to pass directly through the board.
Slide the switch to the left to manually control the level of equalization of the MAX3815. Slide it to the
right to have the MAX3815 automatically control the level of equalization.
Quick Start
5)
6)
If manual control of the equalizer is desired, switch SW4
to MANUAL. To increase the amount of equalization
(long cables), turn R12 clockwise. To decrease the
amount of equalization (short cables), turn R12 counter-
clockwise. Note that during manual equalization, all
three data channels will be set to the same level of
equalization.
The MAX3208 provides 15kV of ESD protection for the
DVI interface. It is designed to provide protection to the
differential lines while maintaining a low capacitance for
minimal effects on signal transmission. Three MAX3208
devices are included on the reference design board on
the cable side of the MAX3815.
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Connect a DVI source to J2 (INPUT FROM CABLE)
and a DVI monitor or DVI receiver at J1 (OUTPUT).
Once the DVI source has begun transmitting, the
red LED (CLK LOSS) will no longer be illuminated.
This indicates that the DVI source has begun
transmitting video.
FUNCTION
ESD Protection