S5PC110_UM
7 ADC & TOUCH SCREEN INTERFACE
7-4
7.4 FUNCTION DESCRIPTIONS
7.4.1 A/D CONVERSION TIME
When the PCLK frequency is 66MHz and the prescaler value is 65, total 12-bit conversion time is as follows.
•
A/D converter freq. = 66MHz/(65+1) = 1MHz
•
Conversion time = 1/(1MHz / 5cycles) = 1/200kHz = 5us
NOTE:
This A/D converter was designed to operate at maximum 5MHz clock, so the conversion rate can go up to 1MSPS.
7.4.2 TOUCH SCREEN INTERFACE MODE
1. Normal Conversion Mode (AUTO_PST = 0, XY_PST = 0)
The operation of this mode is same as AIN0~AIN9's. To initialize this mode, set the TSADCCON0 (ADC control
register) and TSCONn (Touch screen control register). The switches and pull-up resistor should be turned off (all
switches are turned off if TSCON0 and TSCON1 are set to 0x58). The converted data can be read out from
TSDATX0 (ADC conversion data X register).
NOTE:
TSADCCON1 register is useless in normal conversion mode. Therefore, TSSEL bit of TSADCCON0 register should
be 0. TSADCCON1 register is meaningless if TSSEL bit is 0.
2. Separate X/Y Position Conversion Mode (AUTO_PST = 0, XY_PST = control)
This mode consists of two states, namely, X-position measurement state and Y-position measurement state.
Steps to operate X-position measurement state;
−
Set ‘0x69’ to TSCONn.
(XY_PST=1, AUTO_PST=0, PULL_UP disable, XP enable, XM enable, YP disable, YM disable)
−
Start conversion by setting TSADCCONn.
−
The end of X-position conversion can be notified by interrupt (INT_ADCn).
−
Read out the converted data (X-position) from TSDATXn.
Steps to operate Y-position measurement state;
−
Set ‘0x9a’ to TSCONn.
(XY_PST=2, AUTO_PST=0, PULL_UP disable XP disable, XM disable, YP enable, YM enable)
−
Start conversion by setting TSADCCONn.
−
The end of Y-position conversion can be notified by interrupt (INT_ADCn).
−
Read out the converted data (Y-position) from TSDATYn.
Summary of Contents for S5PC110
Page 4: ...Section 1 OVERVIEW ...
Page 28: ...Section 2 SYSTEM ...
Page 374: ...S5PC110_UM 4 POWER MANAGEMENT 4 14 4 Let DRAMs exit from self refresh mode ...
Page 473: ...S5PC110_UM 6 BOOTING SEQUENCE 6 10 Figure 6 3 Secure Booting Diagram ...
Page 474: ...Section 3 BUS ...
Page 491: ...S5PC110_UM 2 CORESIGHT Figure 2 4 Structure of the Coresight DAP Components 2 8 ...
Page 506: ...Section 4 INTERRUPT ...
Page 537: ...Section 5 MEMORY ...
Page 540: ......
Page 703: ...Section 6 DMA ...
Page 705: ...List of Figures Figure Title Page Number Number Figure 1 1 Two DMA Tops 1 1 ...
Page 737: ...Section 7 TIMER ...
Page 795: ...Section 8 CONNECTIVITY STORAGE ...
Page 883: ...S5PC110_UM 5 USB2 0 HS OTG 5 7 5 6 3 OTG FIFO ADDRESS MAPPING Figure 5 3 OTG FIFO Mapping ...
Page 1100: ...Section 9 MULTIMEDIA ...
Page 1116: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 5 Figure 1 2 Block Diagram of the Data Flow ...
Page 1125: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 14 1 3 3 2 7 16BPP Display 1555 P1 P2 P3 P4 P5 LCD Panel ...
Page 1145: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 34 Figure 1 10 Blending Decision Diagram ...
Page 1149: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 38 Figure 1 14 Hue Control Block Diagram ...
Page 1184: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 73 ...
Page 1226: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 115 ...
Page 1328: ...S5PC110_UM 2 1BCAMERA INTERFACE 2 81 ...
Page 1369: ...S5PC110_UM 4 3BMIPI CSIS 4 2 4 2 BLOCK DIAGRAM Figure 4 1 MIPI CSI System Block Diagram ...
Page 1381: ...S5PC110_UM 4 3BMIPI CSIS 4 14 ...
Page 1431: ...S5PC110_UM 6 5BMULTI FORMAT CODEC 6 39 ...
Page 1471: ...S5PC110_UM 6 5BMULTI FORMAT CODEC 6 79 Figure 6 7 VC1 Parameters ...
Page 1626: ...S5PC110_UM 10 9BHIGH DEFINITION MULTIMEDIA INTERFACE 10 17 Figure 10 10 Channel Status Block ...
Page 1775: ...S5PC110_UM 13 12BG2D 13 6 FIMG 2D FIMG 2D FIMG 2D Figure 13 3 Rotation and Flip Example ...
Page 1798: ...Section 10 AUDIO ETC ...
Page 1803: ...S5PC110_UM 1 AUDIO SUBSYSTEM 1 2 Figure 8 7 Keypad I F Block Diagram 8 8 ...
Page 1951: ...Section 11 SECURITY ...
Page 1954: ...List of Tables Table Title Page Number Number Table 1 1 Security Features of S5PC110 1 2 ...
Page 1964: ...S5PC110_UM 2 ADVANCED CRYPTO ENGINE Figure 2 9 DES Byte Swapping Scheme 2 9 ...
Page 2005: ...Section 12 ETC ...
Page 2039: ...Section 13 SIZE BALL MAP ...