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DKHiQV-PCI (Fab. Rev. B) User’s Guide
&+,36
DKHiQV-PCI (Fab. Rev. B) Subject to Change Without Notice
Revision 1.3 7/2/99
6.12
Mixed Voltage Generation and Power Measurement
The DKHiQV-PCI based board has jumpers to choose different supply voltages for each block of the video
subsystem. The voltages chosen could be 5V from the bus, 3.3V from the bus or a voltage from an onboard
voltage regulator. The latter voltage is adjustable by resistor pots, except for the internal clock power sup-
ply. All HiQVideo
controllers provide an easy and accurate way to measure the power dissipation of the
various blocks of the video subsystem.
Table 6 describes the various blocks of the video subsystem supplied by individually configurable voltages,
as well as where to measure these voltages and the power dissipation (current) for each block. Refer to
Tables 7 through 10 and the DKHiQV-PCI/ABHiQV schematics for the correct default settings.
Table 6: Video Sub-System Voltages
Example: To measure the power consumed by the internal DAC of the 69xxx, replace the W27 jumper plug
with an ammeter. The desired voltage may be measured at W27 pin 2.
6.13
Power Sequencing and Backlight Control
Flat panel displays are extremely sensitive to conditions where full biasing voltage VEESAFE is applied to
the liquid crystal material without enabling the control and data signals to the panel.
The DKHiQV-PCI based board provides three controlled voltages: VDDSAFE (VDD) for driver electronics,
VEESAFE (VEE) for LCD bias and +12VSAFE (BACKLIGHT) for easy access for most panels. The power
sequencing control signals ENAVEE, ENAVDD and ENABKL regulate application of bias voltage and +5V
to the panel and +12V to the inverter for backlight operation.
DKHiQV-PCI
Voltage Name
Blocks of Video Sub-system
Supplied by the Voltage
Voltage
Measurement Point
Current
Measurement Point
GVCC
BIOS, Video encoder digital Vcc
SH5
SH5
AVCC
Video encoder analog Vcc
SH5
FB10
XVCC55X
Video capture port
W34, pin 2
W34
BVCC55X
Bus interface
W33, pin 2
W33
RAMVCC
DRAM
W32, pin 2
W32
MVCC55X
Memory logic
W31, pin 2
W31
DVCC55X
Panel interface
W30, pin 2
W30
IVCC55X
Internal logic
W28, pin 2
W28
AVCC55X
Internal DAC
W27, pin 2
W27
OSCVCC
External oscillator
W26, pin 2
W26
B65555/69xxx
Voltage Name
Blocks of Video Sub-system
Supplied by the Voltage
Voltage
Measurement Point
Current
Measurement Point
VVCC55X
Video interface
W34, pin 2
w34
CVCC55X
CRT interface
W36, pin 2
W36
PVCC
Internal clock synthesizer power 0
W24, pin 2
SH7
SVCC
Internal clock synthesizer power 1
W24, pin 2
SH6
