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6.4.2.1 ADC Configuration (CFR0)
Kit Operation
Figure 4. Configuration Tab of Software GUI Screen
This section controls the parameters in CFR0. Each button or selection controls one parameter.
• Pen Control Mode
The button controls if the touch data acquisition is started or initialized by host processor's command
(manually) or by a touch on the screen (automatically). Default by touching screen.
• Stop ADC
This button can stop TSC2004 ADC, or put the ADC to normal running mode. Default to normal
running mode.
• Resolution
Selects between 10- and 12-bit resolution. Note that, the bit #2 of CB1 also controls the resolution and
thus you may need to double-check the settings at both places to make sure they are consistent.
Default setting is 12-bit resolution.
• Conversion Clock
The internal clock which runs the A/D converter can run at 4, 2, or 1 MHz. Note that, when running at
4 MHz, only 10-bit resolution is possible, but 12-bit is not. Thus, you may need to check resolution
setting after selecting 4-MHz conversion clock. By default, the clock is running at 2 MHz.
• Panel Voltage Stabilization Time
This is the time that the TSC2004 allows for the touch screen to settle after turning the drivers on.
• Precharge Time
SLAU215 – May 2007 TSC2004EVM and TSC2004EVM-PDK 11
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