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S3C6400 MICROPROCESSOR
39
ADC & TOUCH SCREEN INTERFACE
This chapter describes the functions and usage of ADC & Touch Screen interface S3C6400X RSIC
microprocessor.
OVERVIEW
The 10-bit CMOS ADC (Analog to Digital Converter) is a recycling type device with 8-channel analog inputs. It
converts the analog input signal into 10-bit binary digital codes at a maximum conversion rate of 500KSPS with
2.5MHz A/D converter clock. A/D converter operates with on-chip sample-and-hold function. The power down
mode is supported.
Touch Screen Interface is controlling pads (XP, XM, YP, YM) of Touch Screen and selecting pads(XP, XM, YP,
YM) of the Touch Screen for X-position conversion, Y-position conversion. The Touch Screen Interface contains
Touch Screen Pads control logic and ADC interface logic with an interrupt generation logic.
FEATURES
The ADC & Touch Screen interface includes the following features:
Resolution: 10-bit
Differential Linearity Error:
Integral Linearity Error: ± 2.0 LSB
Maximum Conversion Rate:
Low Power Consumption
Power Supply Voltage: 3.3V
Analog Input Range: 0 ~ 3.3V
On-chip sample-and-hold function
Normal Conversion Mode
Separate X/Y position conversion Mode
Auto(Sequential) X/Y Position Conversion Mode
Waiting for Interrupt Mode
STOP mode wakeup source
± 1.0 LSB
500 KSPS
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
ADC AND TOUCH SCREEN INTERFACE
39-1
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