Samsung S5PC110 Manual page 1927

S5PC110_UM
7.4.2.3 Touch Screen0 Pin Conditions in Wait for Interrupt Mode
Mode
TS0: Waiting for Interrupt Mode
7.4.2.4 Touch Screen1 Pin Conditions in Wait for Interrupt Mode
Mode
TS1: Waiting for Interrupt Mode
7.4.3 STANDBY MODE
Standby mode is activated when TSSEL bit is '0' and STANDBY bit is '1' in TSADCCON0 register. In this mode,
A/D conversion operation is halted and TSDATXn and TSDATYn registers hold their values.
7.4.4 TWO TOUCH SCREEN INTERFACES
There are two set of touch screen interfaces, namely, AIN[5] ~ AIN[2] for touch screen 0 and AIN[9] ~ AIN[6] for
touch screen 1. There are separate switches for XP, XM, YP and YM control and separate registers to interface
with two touch screens. They share one analog digital converter, so interfacing with the two touch screens should
be performed in turn. TSSEL bit of TSADCCON0 register is used to select which touch screen is connected to the
ADC. Therefore, you must set '1' to TSSEL before an access to TSADCCON1. Similarly, you must set '0' to
TSSEL before an access to TSADCCON0.
An access to TSADCCON1 bits is prohibited when TSSEL bit is '0', and an access to TSADCCON0 bits except
TSSEL is also prohibited when TSSEL bit is '1'. An access to TSSEL bit is always permitted.
XP0
VDDA_ADC
(Pull-up enable)
XP1
VDDA_ADC
(Pull-up enable)
7 ADC & TOUCH SCREEN INTERFACE
XM0 YP0
Hi-z Hi-z
XM1 YP1
Hi-z Hi-z
YM0
VSSA_ADC
YM1
VSSA_ADC
7-6