About s5pv210 ADC and touch screen controller

The 10-bit or 12-bit CMOS analog to digital converter (ADC) comprises of 10-channel analog inputs. It converts
The analog input signal into 10-bit or 12-bit binary digital codes at a maximum conversion rate of 1 MSPs
5 MHz A/D converter clock. A/D converter operates with On-Chip sample-and-hold function. ADC supports low
Power mode.
Touch screen interface can control input pads (XP, XM, YP, and ym) to obtain x/y-position on the external touch
Screen device. Touch Screen Interface contains three main blocks, namely, touch screen pads control logic, ADC
Interface logic and interrupt generation logic.There are two set of touch screen interfaces, which share one ADC.

 

 

 

-- Dizzy, s5pv210 actually has two sets of touch screen interfaces and uses an ad controller. In this case, s5pv210 also has two LCD controllers. Otherwise, two touch screen controllers will be useless.

Hey hey, I only need one touch screen, so it's okay to use another touch screen to control the occupied ad.

 

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 shocould
Be writable med in turn. tssel bit of tsadccon0 register is used to select which touch screen is connected to
ADC. Therefore, you must set '1' to tssel before an access to tsadccon1. Similarly, you must set '0'
Tssel before an access to tsadccon0.
An access to tsadccon1 bits is prohibited when tssel bit is '0', and an access to tsadccon0 bits limit t
Tssel is also prohibited when tssel bit is '1'. An access to tssel bit is always permitted.

 

 

Note:
1. When touch screen is not used, the touch screen ports (ain2 ~ Ain9) can be used as analog input ports for ADC.

 

This is similar. Good, good.