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ADC AND TOUCH SCREEN INTERFACE
ADC & TOUCH SCREEN INTERFACE OPERATION
BLOCK DIAGRAM
Figure 39-1 shows the functional block diagram of A/D converter and Touch Screen Interface.
Note: The A/D converter device is a recycling type.
AVDD
AGND
Pullup
XP
XM
YP
YM
A[3:0]
Figure 39-1. ADC and Touch Screen Interface Functional Block Diagram
*Note (symbol
)
When Touch Screen device is used, XM or YM is only connected to ground for Touch Screen I/F.
When Touch Screen device is not used, XM or YM is connecting Analog Input Signal for Normal ADC conversion.
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
39-2
Specifications and information herein are subject to change without notice.
Touch Screen
Pads control
note
8:1
MUX
note
ADC input
control
Waiting for Interrupt Mode
S3C6400 MICROPROCESSOR
A/D
Converter
ADC interface
&Touch Screen
Control
INT_ADC
Interrupt
Generation
INT_WKU
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