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PRELIMINARY
S3C6400 MICROPROCESSOR
ADC AND TOUCH SCREEN INTERFACE
39-1
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.
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:
z
Resolution: 10-bit
z
Differential Linearity Error:
±
1.0 LSB
z
Integral Linearity Error:
±
2.0 LSB
z
Maximum Conversion Rate:
500 KSPS
z
Low Power Consumption
z
Power Supply Voltage: 3.3V
z
Analog Input Range: 0 ~ 3.3V
z
On-chip sample-and-hold function
z
Normal Conversion Mode
z
Separate X/Y position conversion Mode
z
Auto(Sequential) X/Y Position Conversion Mode
z
Waiting for Interrupt Mode
z
STOP mode wakeup source