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Preliminary
ADC AND TOUCH SCREEN INTERFACE
S3C2451X RISC MICROPROCESSOR
24-2
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 24-1 shows the functional block diagram of A/D converter and touch screen interface. Note that the A/D
converter device is a recycling type.
10:1
MUX
PULL_UP
XM_SEN
YM_SEN
XP_SEN
YP_SEN
Touch screen
pads control
A/D
Converter
ADC
interface
&
Touch
screen
control
ADC input
control
Interrupt
generation
SUBINT_ADC
SUBINT_TC
Waiting for interrupt
VDDA_ADC
VDDA_ADC
AIN9(XP)
AIN8(XM)
AIN7(YP)
AIN6(YM)
AIN[5:0]
VDDA_ADC
Figure 24-1. ADC and Touch Screen Interface Block Diagram