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PRELIMINARY
ADC AND TOUCH SCREEN INTERFACE
S3C6400 MICROPROCESSOR
39-2
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
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.
Pullup
Waiting for Interrupt Mode
INT_WKU
INT_ADC
8:1
MUX
A/D
Converter
ADC input
control
Touch Screen
Pads control
Interrupt
Generation
ADC interface
&Touch Screen
Control
AVDD
AGND
XP
XM
YP
YM
A[3:0]
note
note
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.