Adc & Touch Screen Interface Operation; Block Diagram - Samsung S3C2416 User Manual

ADC AND TOUCH SCREEN INTERFACE
2 ADC & TOUCH SCREEN INTERFACE OPERATION

2.1 BLOCK DIAGRAM

Figure 22-1 shows the functional block diagram of A/D converter and touch screen interface. Note that the A/D
converter device is a recycling type.
VDDA_ADC
AIN9(XP)
AIN8(XM)
AIN7(YP)
AIN6(YM)
AIN[5:0]
22-2
PULL_UP
XM_SEN
YM_SEN
VDDA_ADC
XP_SEN
YP_SEN
VDDA_ADC
10:1
MUX
ADC input
control
Figure 22-1. ADC and Touch Screen Interface Block Diagram
Touch screen
pads control
A/D
Converter
Waiting for interrupt
S3C2416X RISC MICROPROCESSOR
ADC
interface
&
Touch
screen
control
SUBINT_ADC
Interrupt
generation SUBINT_TC