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S3C2416X RISC MICROPROCESSOR
22
1 OVERVIEW
The 12-bit CMOS ADC (Analog to Digital Converter) is a recycling type device with 10-channel analog inputs. It
converts the analog input signal into 12-bit binary digital codes at a maximum conversion rate of 1MSPS with
5MHz A/D converter clock. A/D converter operates with on-chip sample-and-hold function and power down
(standby) mode is supported.
Touch screen interface can controls input pads (XP, XM, YP and YM) to obtain X/Y-positions on the external
touch screen device. Touch Screen Interface contains three main blocks; these are touch screen pads control
logic, ADC interface logic and interrupt generation logic.
1.1 FEATURES
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Resolution: 10-bit / 12-bit (controllable)
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Differential Linearity Error: ± 2.0 LSB
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Integral Linearity Error: ± 4.0 LSB
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Maximum Conversion Rate: 1 MSPS
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Low Power Consumption
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Power Supply Voltage: 3.3V
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Reference Voltage (VREF): 3.3V
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On-chip Sample-and-hold Function
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Normal Conversion Mode
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Separate X/Y position conversion Mode
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Auto (Sequential) X/Y Position Conversion Mode
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Waiting for Interrupt Mode
ADC & TOUCH SCREEN INTERFACE
ADC AND TOUCH SCREEN INTERFACE
24-1
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