Samsung S5PC110, Manual

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S5PC110_UM 7 ADC & TOUCH SCREEN INTERFACE
7-13
Touch screen0 pin conditions in X/Y position conversion.
XP0 XM0 YP0 YM0 ADC ch. select
TS0: X Position Vref GND AIN[3] Hi-Z YP0
TS0: Y Position AIN[5] Hi-Z Vref GND XP0
Touch screen1 pin conditions in X/Y position conversion.
XP1 XM1 YP1 YM1 ADC ch. select
TS1: X Position Vref GND AIN[7] Hi-Z YP1
TS1: Y Position AIN[9] Hi-Z Vref GND XP1
7.7.1.3 ADC Delay Register (TSDLYn)
• TSDLY0, R/W, Address = 0xE170_0008
• TSDLY1, R/W, Address = 0xE170_1008
TSDLYn Bit Description Initial State
FILCLKsrc [16] Reference clock source for delay.
0 = X-tal clock.
1 = RTC clock.
0
DELAY [15:0] In case of ADC conversion mode (Normal, Separate, Auto conversion);
ADC conversion is delayed by counting this value. Counting clock is
PCLK.
→ ADC conversion delay value.
In case of waiting for Interrupt mode:
When stylus down occurs in waiting for interrupt mode, it generates
interrupt signal (INT_PENn) at interval of several ms for Auto X/Y
position conversion.
If this interrupt occurs in STOP mode, it generates Wake-Up signal,
having interval (several ms), for Exiting STOP MODE.
Note: Do not use zero value(0x0000)
00ff
NOTE:
Before ADC conversion, Touch screen uses X-tal clock.
During ADC conversion PCLK (Max. 66MHz) is used.